Xeon Owners Club

[gizmo613]

Well, the i7 920 was delivered yesterday. Didn't get a chance to try it due to my daughter having bronchitis. Should get some time late tonight. Will update then.

 

[Edwired]

Well the tdp is what the max power cpu will use anything beyond that it a waste in heat just because someone said it uses more than 145w doesnt mean the cpu is using all that as it down to all the parts in the computer. Sure if anyone is clever to find a way to measure the power usage in all the pc parts the subtract each one and see what you left with. Then again if one to find a way to make a board to test the true cpu power comsumption it would be alot easier. But the real problem is the vrm power delivery on the motherboard will have to work overtime just to keep the cpu happy but then again the bios is in auto setting is supplying more voltage than it should which explained the increased power comsumption as you are better off setting all the voltages and any other feature manually in order to control the power comsumption. As that just the way i see it

 

[lexluthermiester]

Phil over at PhilsComputerLab did this video on 775/771 Xeons. Thought it was a very interesting perspective.

 

[ManGupta]

TDP doesn't really mean anything anyway. Its supposed to be the amount of heat itll chuck out hence the T for thermal. Also there is no standard way of measuring it and so a 95w intel part will be different, in terms of heat and power, from a 95w amd part.

Its more like a guideline and cooler manufacturers hardly ever say how many watts a cooler can dissipate anyway so its nearly pointless

For the sake of knowledge ........ can you enlighten us whether "is there any correlation between Power Rating/Power Consumption of processor and TDP (Is the Thermal Dissipation of Processor a derivative of its Power consumption) or are they completely independent of each other.

BTW CPU cooler Manufacturer do mention in their Spec the TDP ...... even if just for guideline ..

 

[lyra]

I know some do but its not as common as you would think.
And yes there will be some correlation as the amount of power you put in means the more heat you get out but its not an empirical industry standard. As i said guideline. Not 100% total accurate and perfect unit of measurment

 

[ManGupta]

Phil over at PhilsComputerLab did this video on 775/771 Xeons. Thought it was a very interesting perspective.

Very Informative Video on Socket 775/771 processors .... actually in past I had been using Gigabyte Soc 775 MB ..... got a Quadcore Q9400 on ebay for just $10 ..... was @ 2.66 GHz OCed it to 3.20 GHz Stable (Cheap G31 MB with just 4 Gigs DDR2 limit allowed only so much) ....... got a Cinebench score of 325.

I know some do but its not as common as you would think.
And yes there will be some correlation as the amount of power you put in means the more heat you get out but its not an empirical industry standard. As i said guideline. Not 100% total accurate and perfect unit of measurment

OK Is there any way to know how much power was actually consumed by my PC ?

 

[lyra]

the whole thing is easy, you get one of those plug socket watt meter thingys. single components are harder, you can do things like get clamp style ammeters on the pcie power leads for graphics cards and add 75 watts based on the assumption that the pcie slot itself is delivering 75watts. cpus are a pain cause there are things like the VRM which have their own power consumption themselves so getting an amp measurement of the eps cable wont be very accurate. HWmon does give you a reading but software readings are always to be taken with a pintch of salt. hwy you shopping for a power supply or something?

 

[ManGupta]

the whole thing is easy, you get one of those plug socket watt meter thingys. single components are harder, you can do things like get clamp style ammeters on the pcie power leads for graphics cards and add 75 watts based on the assumption that the pcie slot itself is delivering 75watts. cpus are a pain cause there are things like the VRM which have their own power consumption themselves so getting an amp measurement of the eps cable wont be very accurate. HWmon does give you a reading but software readings are always to be taken with a pintch of salt. hwy you shopping for a power supply or something?

No Just for sake of knowledge ........ but yes I will upgrade my PSU once I get a new GPU but not right now.

 

[Edwired]

The plug for watt reading is a good idea but that combined every other parts of the computer like i said it best to run every thing stock including the bios set manually in order to get a baseline for power comsumption otherwise it involved more time figuring it out

the whole thing is easy, you get one of those plug socket watt meter thingys. single components are harder, you can do things like get clamp style ammeters on the pcie power leads for graphics cards and add 75 watts based on the assumption that the pcie slot itself is delivering 75watts. cpus are a pain cause there are things like the VRM which have their own power consumption themselves so getting an amp measurement of the eps cable wont be very accurate. HWmon does give you a reading but software readings are always to be taken with a pintch of salt. hwy you shopping for a power supply or something?

How the asus p5k premium getting on with the x5450?

 

[lexluthermiester]

the whole thing is easy, you get one of those plug socket watt meter thingys.

There is the KillAWatt.;
https://www.amazon.com/P3-P4400-Electricity-Usage-Monitor/dp/B00009MDBU

 

[gizmo613]

I put in the i7 920 and still no boot.

 

[Zyll Goliat]

I put in the i7 920 and still no boot.

Try to reset the CMOS/BIOS first....and then try it again...let´s hope it will work otherwise it might be that your mobo is kaput.......

 

[ManGupta]

I put in the i7 920 and still no boot.

You can also try figuring out by using a motherboard speaker .... and observe what Beep Code Error it throws.

 

[Edwired]

You can also try figuring out by using a motherboard speaker .... and observe what Beep Code Error it throws.

Some motherboard dont have a speaker some come with a lcd error code display and some with nothing. Most likely the cpu doesnt support higher speed ram or try a cpu that works then adjust some settings then pop back the i7 920 back in to see if it boots.

Here some info based on that i7 920
These processors support DDR3 memory with a maximum frequency of 1066 MHz. If faster DDR3 memory is used (such as 1333 MHz or 1600 MHz), it will be down-clocked to operate at 1066 MHz.

 

[agent_x007]

That's why you get JEDEC profiles in RAM though.
There is no such thing as "too fast RAM", and that 1066MHz "limitation" for i7 920 - doesn't exist in the first place.
X58 chipset can set whatever frequency You desire, and I didn't find a motherboard that doesn't allow frequency manipulation on X58 platform (I didn't checked OEM only one, or server stuff).

If BIOS supports the chip capacity of the RAM module, it should work with that module.

Keep in mind : Nehalem CPUs have IMC limitation, which makes three of RAM slots "primary" and other three "secondary". You have to install at least one RAM module into primary slot for CPU to work (assuming the slot works). Which ones are which are described in MB manual.

 

[Edwired]

That's why you get JEDEC profiles in RAM though.
There is no such thing as "too fast RAM", and 1066MHz "limitation" for i7 920 - doesn't exist in the first place. X58 chipset can set what ever frequency You desire and I didn't find a motherboard that doesn't allow frequency manipulation on X58 (as long as it's not OEM only, or server one).
If BIOS supports the chip capacity of the RAM module, it should work with that module.

Keep in mind : Nehalem CPUs have IMC limitation, which makes three of RAM slots "primary" and other three "secondary". You have to install at least one RAM module into primary slot for CPU to work (assuming the slot works).

Dont forget some motherboard cant adjust to the jedec at all some will need to be forced to adjust as i learned the hard way with my asus p5q premium as the bios selected it own not the ram jedec for example the trfc is 52 by bios and jedec stated 68

 

[agent_x007]

Well, I woudn't be surprised if adjusting to JEDEC only worked if :
1) Auto option is set in BIOS (ie. AUTO for ALL DRAM settings)
2) ICs used by memory module are supported by BIOS
Also, tRFC is a timing (and not primary one on top of that), DRAM frequency is different.
Lastly, X58 is an enthusiast chipset, in case of LGA 775 - have you heard about X38/X48 board that doesn't allow Frequency change ?

 

[Edwired]

Im not saying you have to change jedec but some bios and boards dont change timings according to memset. I explain my case i have mushkin and gskill both different brand works fine but the asus p5q premium have selected it own timings where it didnt obey the jedec. I cant say im right or wrong but that as clear as day

 

[agent_x007]

Well, that's why you get a "RAM Support" list isn't it ?
If memory wasn't problematic - it would be in there (that is, if manufacturer was bothered enough to test it that is ).
Sorry to ask (but I don't remember), do your different RAM modules have the same tRFC in JEDEC profiles ?

 

[Edwired]

Then again the xmp is used in newer board it shows the adjusted timing at selected freq where the older jedec dont change the timings at the selected freq there for we have to force it to run it manually

 

[agent_x007]

Sure, XMP can be used... on X58 and later (since it was made for X58/P55 in the first place).
It never worked for me on LGA 775 boards I got (option for it either simply wasn't there, or PC never booted when it was selected)
I didn't tried that many boards (or memory modules) with it, so I can't be 100% sure that there are no exceptions to this.

 

[Edwired]

I know that

Nothing worse if anyone bought ram thinking it will work straight away but theres alot more that meet the eye when some dont read the support list as most just follow everyones pc spec like example on youtube jay2cent skunkworks pc is extremely overkill theres no way he dumped that much money into it like that easily 6 or 7 grand of parts in it

 

[gizmo613]

I had the battery removed for over 24 hours and installed it when I install the i7 920, still no boot, same symptoms. Then I read up on how this MB is picking with power supplies. And......

It was the power supply. I swapped power supply and it booted into bios with the i7 920. It has bios revision FB. It'll need an update to support the Xeon that I have. Just have to remove the old power supply and reroute the new power supply.

 

[Edwired]

So the power supply was busted what brand was it?

 

[gizmo613]

Not sure if it was busted. I will install it in the other PC PC I swapped the power supply from.