Dell Workstation Owners Club

[Mafiatounes]

For the GPU limitation i don't think there is a limitation i now have a RTX 2080ti with 8pin to 2x8pin my psu is a 1300w and the gpu pulls approximatly 265w in total according to hwinfo.

I am not sure if a lower psu model would have limits, my current config is not the standard since most have the 685/825w psu. I had the 685w stock but did not ran the 2080ti with it.

Can't help with the bios, still need to get to it while waiting on a programmer.

Welcome to TPU and happy holidays

 

[sk111]

1) https://www.techpowerup.com/forums/threads/throttlestop-overclocking-desktop-pcs.235975/page-63 - if you overclock a 16xx v3 (eg 1650v3 1660v3) you can use scewin and xtu script at startup (this will not work on v4 cpus eg 1650v4 etc (no need for Throttlestop) this will not work on 26xxx v3 CPUs. For TBU (turbo boost unlock) you need the external programmer and that will work on 26xxx v3 processors (2697v3, 2699v3 etc) and not on V4 CPUs or 16xx v3/v4. The best performance is go overclock on a 16xx v3 CPU as better gains for gaming if that is the objective (have a look in the thread above on how to do this). The TBU which is applied in the series 26xxx v3 is not as powerful in gaming as the cpus are bound by TDP limitations on that hack and need to either remove hypethreading in bios or even disable some cores to increase single core frequency (but still single core performance will be well below the overclocking on 16xx v3 hence the performance issue in gaming). In that case you dont need XTU or Throttlestop as it is a different operation. Also to note with that hack the sleep is disabled (or if you use it will crash shortly after) - something that is not happening if you go the overclock method on 16xx v3.

2) I have a rtx 3080 that can draw around 350Watts (OCed) on an 825Watt power supply - for such a power you need 1 8pin coming from the Power_VGA1 in your distribution board and 1 coming from the CPU2. If the power supply is 685 it doesnt split the rails of CPU2 and Power_VGA1 which now are on the same rail and you cannot power such a high spec GPU. In the 685 Watt power supply the max you can get is 18Ampsx12V=216 Watts + the 75 Watt from the power of the PCIE slot= 291watt (you can either do that with a single cable from the Power_VGA1 that has 2x8pins (or 8+6) or 1 from Power_VGA1 and 1 from Power_CPU2 but it is the same rail either way). So if your card is well below that limit (eg lower spec card or significant undervolt in the 3080) you should be fine in theory (in practice the leeway need to be more as the gpu could have power spikes and may not work properly).

 

[stefan0815]

Thanks for the welcome!

My 2. question was written very late in the evening.
There are several mod Bios versions around this forum. Most information i got was from miyconst (@masterdeejay ?), who did also a few very intersting youtube videos.
My Idea is to buy a cheap V3 CPU and let it run in moded allcore boost most of the time. What i did not understand is, how the overclocking mechanism is on the T5810.
@sk111 i think i will start with software and then flash (with programmer) later.

I know that i am a little bit late, since the V3 were a hot thing a few years ago. Thanks for the links to the right places!

To the Powersupply:

I started years ago with a 3600 with a 425W Powersupply. I put REG ECC Memory in and couldn't believe my eyes, since dell blocked ECC REG Memory with the low Power supplys (nice message on screen).
You had to use a 600w supply to get at least ECC working. So i compared the 635W supply with a 425W one and moded the Power supply PCB in a way that it can also run ECC REG Memory. I am sorry that i forgot the exact details. Since today those powersupplys are very cheap, noone will go this way ;-).

What you can do on the regular T3600 Board (might be simmilar in T5810) is, that you connect one or both CPU Power Rails to the GPU ones. I got the Fury X flawlessly working with the 425W Supply.
The 425W and 635W Powersupply is internal single rail Supply. As long as you don't short the rails, it should be fine (I think the 18A is to prevent burning a single 12V cable).

@sk111 the power Board you have shown is a T5600 Board ?
It is much nicer to use this one with a proper molex connector to adapt CPU Power to GPU Power but it also needs some time to build proper cables and find this PCB as a replacement Part quite cheap.

 

[sk111]

Thanks for the welcome!

My 2. question was written very late in the evening.
There are several mod Bios versions around this forum. Most information i got was from miyconst (@masterdeejay ?), who did also a few very intersting youtube videos.
My Idea is to buy a cheap V3 CPU and let it run in moded allcore boost most of the time. What i did not understand is, how the overclocking mechanism is on the T5810.
@sk111 i think i will start with software and then flash (with programmer) later.

I know that i am a little bit late, since the V3 were a hot thing a few years ago. Thanks for the links to the right places!

To the Powersupply:

I started years ago with a 3600 with a 425W Powersupply. I put REG ECC Memory in and couldn't believe my eyes, since dell blocked ECC REG Memory with the low Power supplys (nice message on screen).
You had to use a 600w supply to get at least ECC working. So i compared the 635W supply with a 425W one and moded the Power supply PCB in a way that it can also run ECC REG Memory. I am sorry that i forgot the exact details. Since today those powersupplys are very cheap, noone will go this way ;-).

What you can do on the regular T3600 Board (might be simmilar in T5810) is, that you connect one or both CPU Power Rails to the GPU ones. I got the Fury X flawlessly working with the 425W Supply.
The 425W and 635W Powersupply is internal single rail Supply. As long as you don't short the rails, it should be fine (I think the 18A is to prevent burning a single 12V cable).

@sk111 the power Board you have shown is a T5600 Board ?
It is much nicer to use this one with a proper molex connector to adapt CPU Power to GPU Power but it also needs some time to build proper cables and find this PCB as a replacement Part quite cheap.

All the things I mention are based on T5810 - no idea on what is applicable on other Dells.

 

[stefan0815]

I think that T3600 is simmilar, when my 5810 arrived can give some feedback.

Now i am thinking about the CPU choice, i don't whant to spend more than 10€ so the following are on my list:

E5-2687W V3
E5-2690 V3
a little bit over buget (16€) is the:
E5-2697 v3

I think the 2690V3 would be the best choice for the price?

 

[sk111]

I think that T3600 is simmilar, when my 5810 arrived can give some feedback.

Now i am thinking about the CPU choice, i don't whant to spend more than 10€ so the following are on my list:

E5-2687W V3
E5-2690 V3
a little bit over buget (16€) is the:
E5-2697 v3

I think the 2690V3 would be the best choice for the price?

1660 v3 OC is the best option. I got it for 15 or so. I wouldnt be bothered with the 26xx but whatever floats your boat. The 1660 v3 is in effect the xeon version of i7-5960X which can be overclocked.

Intel Core i7-5960X Specs

Haswell-E, 8 Cores, 16 Threads, 3 GHz, 140 W

www.techpowerup.com

 

[stefan0815]

In the Moment there are no cheap 1660v3 available and the 1650v3 with only 6cores seems to be overpriced too. It's said that the 1620v3 does not have an unlocked Multiplier.

 

[sk111]

In the Moment there are no cheap 1660v3 available and the 1650v3 with only 6cores seems to be overpriced too. It's said that the 1620v3 does not have an unlocked Multiplier.

I got them from Aliexpress including delivery. 1650v3 is like 7. But depends whether they can post to your location.

 

[Cyber Akuma]

I have a Dell Precision T5810, does anybody know the pinout for the 12-pin CPU2 connector shown in post #3,227? Or what the name of the other end of the connector is called if that's a standard connector?

I am trying to make some adapter cables to power additional fans with it.

 

[sk111]

I have a Dell Precision T5810, does anybody know the pinout for the 12-pin CPU2 connector shown in post #3,227? Or what the name of the other end of the connector is called if that's a standard connector?

I am trying to make some adapter cables to power additional fans with it.

Dell T7810 / 7610 / 5810 10pin CPU connection to 8pin PCIe | DELL Technologies

Greetings, here is how to wiring a cable to get the 10pin CPU_2 connection to 8pin PCIe Maybe it will help someone.

www.dell.com

See above. Another idea - I use the dvd sata power connector converter to fan cable. Like the one below and you can find ones with 4 or 5 fan connectors which can be adapted eg to power leds etc

 

[Cyber Akuma]

Dell T7810 / 7610 / 5810 10pin CPU connection to 8pin PCIe | DELL Technologies

Greetings, here is how to wiring a cable to get the 10pin CPU_2 connection to 8pin PCIe Maybe it will help someone.

www.dell.com

See above. Another idea - I use the dvd sata power connector converter to fan cable. Like the one below and you can find ones with 4 or 5 fan connectors which can be adapted eg to power leds etc

That's exactly very similar to my current setup (Mine just has a fourth connector to get a PWM signal), problem is it started giving me problems. If I plug it into my SATA power cable it stops my HDD that I also have plugged into the other SATA connector on that cable from working. So I am trying to figure out alternate ways to power the fans, such as either from the CPU power port or from that internal USB port.

 

[sk111]

That's exactly very similar to my current setup (Mine just has a fourth connector to get a PWM signal), problem is it started giving me problems. If I plug it into my SATA power cable it stops my HDD that I also have plugged into the other SATA connector on that cable from working. So I am trying to figure out alternate ways to power the fans, such as either from the CPU power port or from that internal

Don't you have 2 sata power cables? I have one that is connected to the ssd (which is double so can take 2 drives) and another that goes to the dvd. I used the dvd one for fans etc. Also my PC boots from nvme and the others are backup drives.

 

[david18820]

I have a T3500
CPU: Intel Xeon W3550 @ 3,07GHz 4CPUs, ~3,1 GHz
GPU: Quadro FX 580

 

[Cyber Akuma]

Don't you have 2 sata power cables? I have one that is connected to the ssd (which is double so can take 2 drives) and another that goes to the dvd. I used the dvd one for fans etc. Also my PC boots from nvme and the others are backup drives.

Yeah, though I am now a little weary on if then that will cause problems with the DVD drive. Also I am planning to put a Blu-Ray drive in this system down the line so I might need that plug.

By the way, I forgot to mention in the pinout diagram you posted. It doesn't show it in that diagram, but at all the top pins +12V and all the bottom pins ground then? The diagram doesn't list what pins 9 and 10 are, though unless they don't follow the pattern of all the others they appear to be +12V.

And moreso, do you know what kind of connector that is? I eventually found out that the fan headers Dell used were Molex SL connectors so I was able to create adapters to add a second CPU fan as a rear exhaust and breakout the PWM pin, so I am assuming that even though the connectors they use on their PSU are not the standard connectors PSUs use, they likely are a type of standard connector that already exists and they didn't manufacture their own connector from scratch.

 

[lexluthermiester]

I have a T3500
CPU: Intel Xeon W3550 @ 3,07GHz 4CPUs, ~3,1 GHz
GPU: Quadro FX 580

Are you using it as a daily driver or a retro machine? Either way, that's a good shout. You got room to grow with that system. It'll easily take 6core CPU's, and a better GPU. I still have mine and still use it.

Welcome to TPU and this Club! And Happy New Year!

 

[sk111]

Yeah, though I am now a little weary on if then that will cause problems with the DVD drive. Also I am planning to put a Blu-Ray drive in this system down the line so I might need that plug.

By the way, I forgot to mention in the pinout diagram you posted. It doesn't show it in that diagram, but at all the top pins +12V and all the bottom pins ground then? The diagram doesn't list what pins 9 and 10 are, though unless they don't follow the pattern of all the others they appear to be +12V.

And moreso, do you know what kind of connector that is? I eventually found out that the fan headers Dell used were Molex SL connectors so I was able to create adapters to add a second CPU fan as a rear exhaust and breakout the PWM pin, so I am assuming that even though the connectors they use on their PSU are not the standard connectors PSUs use, they likely are a type of standard connector that already exists and they didn't manufacture their own connector from scratch.

Multimeter will confirm the voltages - not really tested it. I use the CPU2 socket to drive my rtx 3080 with this cable

https://www.amazon.co.uk/dp/B07XMGDRBP

and one cable from the power VGA

https://www.amazon.co.uk/dp/B07HCYDK5K

Hope it helps.
For the fans I simply purchased one of the dell front case fans and strapped it at the front of my CPU and removed the plug of the fan at the front (directly front of CPU) - already the airflow is excellent and need extra air on the CPU for cooling - just need to adjust the offset in bios for the fans to around 20% and you will see massive improvement are you aware of the bios adjusting? For me it cools the overclocked cpu even at 175 watt stress test to below 80C plus you get a nice airflow over the VRMs (I assume you have put some aluminium fins there if you overclock). I will still add a smaller fan for the VRM directly in front of them just behind the cpu cooler as an extra measure - but again this is if you push the machine hard on OC. I am running it at 4.5-4.6 daily with OC and core voltage 1.30-1.31. See photo below. Also have removed the DVD drive altogether on this machine to fit the GPU which is quite massive.

But can I ask why you need so many fans are you overclocking too? Otherwise with a small 8 or 9 cm fan at the back like I have potentially powered from the internal USB port and the offset I mentioned in bios on your main fans (10-20 %) you have more than enough airflow. So no need to mess up with the other bits.
The machine has super powerful inflow as the fans it has are workstation industrial fans (the one I strapped on the cpu says 110 cfm max) so no need for anything extras for normal usage. If you slide the fan speed control towards 50% you will see what I mean. I dare you to test the 100% will be like it is ready to take off

 

[Cyber Akuma]

For the fans I simply purchased one of the dell front case fans and strapped it at the front of my CPU and removed the plug of the fan at the front (directly front of CPU) - already the airflow is excellent and need extra air on the CPU for cooling - just need to adjust the offset in bios for the fans to around 20% and you will see massive improvement are you aware of the bios adjusting? For me it cools the overclocked cpu even at 175 watt stress test to below 80C plus you get a nice airflow over the VRMs (I assume you have put some aluminium fins there if you overclock). I will still add a smaller fan for the VRM directly in front of them just behind the cpu cooler as an extra measure - but again this is if you push the machine hard on OC. I am running it at 4.5-4.6 daily with OC and core voltage 1.30-1.31. See photo below. Also have removed the DVD drive altogether on this machine to fit the GPU which is quite massive.

But can I ask why you need so many fans are you overclocking too? Otherwise with a small 8 or 9 cm fan at the back like I have potentially powered from the internal USB port and the offset I mentioned in bios on your main fans (10-20 %) you have more than enough airflow. So no need to mess up with the other bits.

Wouldn't that give you a warning that the CPU fan is missing every time you boot the system that you have to manually press a button on your keyboard every time to bypass? I recall reading that it will complain if their proprietary CPU fan is not plugged into the CPU fan header.

Regardless, the CPU temperature is not the problem (Especially after I installed a rear exhaust fan, which I see you have too. Seriously, it's INSANE that they don't have one, I haven't seen a computer missing a rear exhaust fan since my Pentium 1 system from 30 years ago.) The whole point of all of this is to cool my GPU, I noticed with the cover on it was going past 80C which I believe is around it's max and was likely throttling, with the fans I lowered it to the high 60s. Sure I can take the cover off, but the computer fills with dust and dirt quickly, especially since it's on the floor.

 

[sk111]

Wouldn't that give you a warning that the CPU fan is missing every time you boot the system that you have to manually press a button on your keyboard every time to bypass? I recall reading that it will complain if their proprietary CPU fan is not plugged into the CPU fan header.

I did not unplug the cpu fan. I unplugged one of the case fans as I mentioned. So I have the cpu fan and an extra case fan. And it doesn't know the case fan is unplugged because have replaced it with another dell case fan .

Regardless, the CPU temperature is not the problem (Especially after I installed a rear exhaust fan, which I see you have too. Seriously, it's INSANE that they don't have one, I haven't seen a computer missing a rear exhaust fan since my Pentium 1 system from 30 years ago.) The whole point of all of this is to cool my GPU, I noticed with the cover on it was going past 80C which I believe is around it's max and was likely throttling, with the fans I lowered it to the high 60s. Sure I can take the cover off, but the computer fills with dust and dirt quickly, especially since it's on the floor.

Yes the rear exhaust is important. With the settings i told you in the bios for the fans my rtx 3080 is very cool with the case cover on like 60-70 on normal gaming. I have undervolted it so topping up 280 watts at 100% usage. What gpu do you have?
In my case more concerned on vrm temps for my overclock.

I have similar settings for my other system which I modded a bit 2699v3 turbo unlocked with the rx 6650xt. Similarly cool temps on the gpu and fans at 20% in the winter and 25% in the summer. In this case the standard cooler is fine just an extra fan at the back.

 

[Cyber Akuma]

I have a EVGA RTX 2060 Super, IIRC it's model number is 08G-P4-3062-KR

And I missed the part where you mentioned changing the fans in your BIOS, I thought the BIOS did not have an option to change the fan curves? Regardless though, the front fans can be very loud, I don't want to increase their speeds further (especially if I can't bind the bottom fan somehow to my GPU temps)

 

[sk111]

I have a EVGA RTX 2060 Super, IIRC it's model number is 08G-P4-3062-KR

And I missed the part where you mentioned changing the fans in your BIOS, I thought the BIOS did not have an option to change the fan curves? Regardless though, the front fans can be very loud, I don't want to increase their speeds further (especially if I can't bind the bottom fan somehow to my GPU temps)

That's an 170 watt tdp card ... no issue at cooling it at the front fans at 10%-20%. The fans are not loud at all. If you haven't tried how do you know they are loud. Probably you are thinking that the fans are loud because you have done the setup test where it operates the fans at 100 % when it checks if they work properly. With the fans at 10- 20 % is actually quiet.
Have a try and let us know.
In any case you can match the wattage of your new fans with the Dell fans and select the appropriate percentage of offset so you compare like for like on noise level. My estimate is that your fans are below the 10 percent level of the dell fans unless you bought strong ones. What wattage are they at max or amperes?

 

[Cyber Akuma]

That's an 170 watt tdp card ... no issue at cooling it at the front fans at 10%-20%. The fans are not loud at all. If you haven't tried how do you know they are loud. Probably you are thinking that the fans are loud because you have done the setup test where it operates the fans at 100 % when it checks if they work properly. With the fans at 10- 20 % is actually quiet.
Have a try and let us know.
In any case you can match the wattage of your new fans with the Dell fans and select the appropriate percentage of offset so you compare like for like on noise level. My estimate is that your fans are below the 10 percent level of the dell fans unless you bought strong ones. What wattage are they at max or amperes?

The 120mm fan is 0.6W/0.05A and the two 60mm fans are 0.96W/0.05A each.

https://www.amazon.com/gp/product/B00650P2ZC

https://www.amazon.com/gp/product/B00VXTANZ4

The rear 80mm fan is also 0.96W.0.08A but that one is connected to the CPU fan header along with the stock CPU fan

https://www.amazon.com/gp/product/B00NEMG62M

The main issue is that the card exhausts all of it's hot air right against the side of the case, and there is very little space between the card and the side of the case for the air to go. It's more getting rid of the hot air the card generates that's the problem rather than getting fresh air to it.

 

[lexluthermiester]

I thought the BIOS did not have an option to change the fan curves?

The default Dell BIOS does not.

 

[sk111]

The 120mm fan is 0.6W/0.05A and the two 60mm fans are 0.96W/0.05A each.

https://www.amazon.com/gp/product/B00650P2ZC

https://www.amazon.com/gp/product/B00VXTANZ4

The rear 80mm fan is also 0.96W.0.08A but that one is connected to the CPU fan header along with the stock CPU fan

https://www.amazon.com/gp/product/B00NEMG62M

The main issue is that the card exhausts all of it's hot air right against the side of the case, and there is very little space between the card and the side of the case for the air to go. It's more getting rid of the hot air the card generates that's the problem rather than getting fresh air to it.

I see yes these are relatively weak fans (which is standard) imagine the dell ones are 18 watts each on the front so you can do the math what that equates at full power. What cfm do they have your fans is it around 20-30 cfm each? The idea is 1) to get fresh air in so that your gpu can operate on cool air 2) to get the hot air out. The front down dell fan provides cool air that goes out from the vents below the gpu and sucked into the gpu. The back exhaust fan will push the hot air out as it rises and this fan needs to operate independently of the cpu and at good speed. Mine runs at 3000 rpm basic Arctic and is connected to the sata cable I mentioned cfm around 23 (all the time) I do not know if you plugging it into the cpu drops the speed/cfm. The addional 2 dell front fans increase the pressure inside the case and this leads to higher exhaust speed from vents at the top and helping the back fan. It's like blowing into a tube to get you the idea. Also i have remove the rm shrouds to combine pressure from all fans.The fact that the machine is not wide means less airflow to increase the pressure and this works well.
Curious if you give it a shot with the configuration told you how it performs. As I told I have good temps in both of my systems and particularly I am running a higher tdp card than yours and an overclocked processor.

The default Dell BIOS does not.

Yes the latest available version a34 has and probably a couple versions back but I heard the original did not have it. So bios needs updating from the dell website.

Also I assume you have the machine upright like a tower as otherwise the thermals would probably be wrong as you need to capture the air that rises otherwise would be on the side as you said and probably confined there.

 

[lexluthermiester]

Yes the latest available version a34 has and probably a couple versions back but I heard the original did not have it. So bios needs updating from the dell website.

Fair enough. Didn't know about that. Nice addition. Wish that had done this on all of their systems.

 

[sk111]

Fair enough. Didn't know about that. Nice addition. Wish that had done this on all of their systems.

Yes and even better if they had speed control in Windows rather that the bios but anyhow works. It is something you don't change often maybe once per season to account for external temps.