Ram Speed questions!

[FireFox]

G.Skill only lists up to DDR3 1600 in triple channel kits, and the command rate should be set to 2.
1866 should work, i'd love to get my hands on one to try it.

Last night after many hours trying different settings i have managed to make the Ram run at 1000+, to make that possible i have had to increase the Bus Speed to 198 and decrease the CPU's multiplier to 12, decreasing the CPU multiplier decrease the CPU GHz and the results were:
CPU 2.4GHz - Ram 1000+, not worth at all, right now the CPU's are overclocked at 4.0GHz, last night i did a slight overclock to 4.2GHz and the Ram was running at 800+, higher overclock = higher Ram Speed, till i don't Watercooler those CPU's i won't overclock higher than 4.2GHz.

Edit: if i had a CPU with higher multiplier, for example: with a multiplier of 30 things would be a lot easier, so far as i know the X5687 3.6GHz/ turbo boost 3.80GHz is 27 but i don't think that things would change that much.

Changing the MCH strap will overclock ram too (Memory Controller Hub)

I have set it at 2266MHz

 

[jsfitz54]

Last night after many hours trying different settings i have managed to make the Ram run at 1000+, to make that possible i have had to increase the Bus Speed to 198 and decrease the CPU's multiplier to 12, decreasing the CPU multiplier decrease the CPU GHz and the results were: CPU 2.4GHz - Ram 1000+, not worth at all

So what is the memory set at, with the 4.0GHz on the cpu? The SR-2 manual would seem to imply that 1600 is the best ram speed you can do.

At 1333 I can lower timing to 7-7-7 on a X5677 paired with MSI Big Bang XPower, the memory is rated for 2133.

 

[FireFox]

So what is the memory set at, with the 4.0GHz on the cpu?

1500.

 

[FireFox]

Here are my results from last night:

 

[INSTG8R]

Could you try to be a bit more condescending?

It's possible that he needs an earlier model Ram that is meant to run at 1.65V, from Ivy Bridge chip set onwards voltages reduced to 1.5V.

Sorry I thought it was pretty common knowledge. But yeah 1366 1.65 was default voltage and it was Sandy when it went to 1.5

 

[CAPSLOCKSTUCK]

I just set default on my rig

 

[FireFox]

I just set default on my rig

View attachment 78048

Right now i have auto, Voltage increase automatically when it need it.

 

[CAPSLOCKSTUCK]

I meant "just this minute", not just as in "simply".

The snip was a demo of what my board sets as default volts with 1366.

XMP profile is 1.5 too

 

[INSTG8R]

I meant "just this minute", not just as in "simply".

The snip was a demo of what my board sets as default volts with 1366.

XMP profile is 1.5 too

View attachment 78049

While it might be a special case with Xeon your XMP profile means nothing other than that is the XMP profile for that particular RAM. Doesn't mean it's "Spec" 1366 mainstream was 1.6V Sandy was when 1.5 became Spec. I bought an upgrade Bundle for when I did my Ex-Wifes new build(CPU/MoBo RAM) 2500K and they bundled it with 1.6V Ram which rather annoyed me because it was "old spec" not to say it doesn't work(of course it does) but it's not "correct" for Sandy or anything after.

 

[Agentbb007]

While it might be a special case with Xeon your XMP profile means nothing other than that is the XMP profile for that particular RAM. Doesn't mean it's "Spec" 1366 mainstream was 1.6V Sandy was when 1.5 became Spec. I bought an upgrade Bundle for when I did my Ex-Wifes new build(CPU/MoBo RAM) 2500K and they bundled it with 1.6V Ram which rather annoyed me because it was "old spec" not to say it doesn't work(of course it does) but it's not "correct" for Sandy or anything after.

I'm a bit confused so does the Microarchitecture (Sandy Bridge, Ivy Bridge, Haswell etc) specify the RAM spec (voltage, speed)? Or does the CPU Socket (LGA 1155, LGA 1150, LGA 1151 etc)?
And then in your case where you have 1.6V ram but the mobo spec says 1.5V do you run the ram at the 1.6V ram spec or the 1.5V mobo spec?

 

[slozomby]

I'm a bit confused so does the Microarchitecture (Sandy Bridge, Ivy Bridge, Haswell etc) specify the RAM spec (voltage, speed)? Or does the CPU Socket (LGA 1155, LGA 1150, LGA 1151 etc)?
And then in your case where you have 1.6V ram but the mobo spec says 1.5V do you run the ram at the 1.6V ram spec or the 1.5V mobo spec?

the ram sticks themselves will have a recommended voltage. and the motherboard will have adjustments to match that. most ddr2 ecc 1333 ram ( very common server ram) is 1.65 volts. ddr4 sticks will go anywhere from 1.2 to 1.65v depending on size of chip and speed. thats why the vendors all put out a "supported ram list".

age of the system will affect it as well. older boards ( such as the one this thread is discussing) didnt know about anything higher than pc1333.

Server boards have far less ( or at least harder to get at) settings for overclocking or using "unsupported" tech

 

[Caring1]

Sandy was when 1.5 became Spec. I bought an upgrade Bundle for when I did my Ex-Wifes new build(CPU/MoBo RAM) 2500K and they bundled it with 1.6V Ram which rather annoyed me because it was "old spec" not to say it doesn't work(of course it does) but it's not "correct" for Sandy or anything after.

Actually Ivy Bridge was when 1.5 became spec, Sandy Bridge was 1.6. G.Skill actually had it printed on the Ram I bought that it could not be used in older systems, and there were forum threads about it at the time.

 

[Caring1]

I'm a bit confused so does the Microarchitecture (Sandy Bridge, Ivy Bridge, Haswell etc) specify the RAM spec (voltage, speed)? Or does the CPU Socket (LGA 1155, LGA 1150, LGA 1151 etc)?
And then in your case where you have 1.6V ram but the mobo spec says 1.5V do you run the ram at the 1.6V ram spec or the 1.5V mobo spec?

The Processor used contains the Memory Controller Hub, so determines the Ram capabilities.
I would not use 1.5V spec Ram in an older board.

 

[FireFox]

The Processor used contains the Memory Controller Hub, so determines the Ram capabilities.
I would not use 1.5V spec Ram in an older board.

My Ram is rated 1.5V and i have the voltages set Auto.

Results: 1.682V

 

[jsfitz54]

My Ram is rated 1.5V and i have the voltages set Auto.
Results: 1.682V

Not sure if the over volt is due to "Auto" setting, the OC or SR-2 specific but have you tried to set it at 1.65v( that may be plenty for a 1.5v kit). The less heat the better.

Also, what is the ram set at (7 or 8 or 9), have you tried to lower the latency, command rate at 1 or 2T?

 

[FireFox]

Not sure if the over volt is due to "Auto" setting, the OC or SR-2 specific but have you tried to set it at 1.65v( that may be plenty for a 1.5v kit). The less heat the better.

Also, what is the ram set at (7 or 8 or 9), have you tried to lower the latency, command rate at 1 or 2T?

I prefer to run command rate 1T, i will try this settings: 9-11-9-27

 

[INSTG8R]

I'm a bit confused so does the Microarchitecture (Sandy Bridge, Ivy Bridge, Haswell etc) specify the RAM spec (voltage, speed)? Or does the CPU Socket (LGA 1155, LGA 1150, LGA 1151 etc)?
And then in your case where you have 1.6V ram but the mobo spec says 1.5V do you run the ram at the 1.6V ram spec or the 1.5V mobo spec?

Like any "Overclocking" you go out Spec.

 

[Schmuckley]

Last night after many hours trying different settings i have managed to make the Ram run at 1000+, to make that possible i have had to increase the Bus Speed to 198 and decrease the CPU's multiplier to 12, decreasing the CPU multiplier decrease the CPU GHz and the results were:
CPU 2.4GHz - Ram 1000+, not worth at all, right now the CPU's are overclocked at 4.0GHz, last night i did a slight overclock to 4.2GHz and the Ram was running at 800+, higher overclock = higher Ram Speed, till i don't Watercooler those CPU's i won't overclock higher than 4.2GHz.

Edit: if i had a CPU with higher multiplier, for example: with a multiplier of 30 things would be a lot easier, so far as i know the X5687 3.6GHz/ turbo boost 3.80GHz is 27 but i don't think that things would change that much.



I have set it at 2266MHz

View attachment 78073

I prefer to run command rate 1T, i will try this settings: 9-11-9-27

There should be another RAM divider.1500-low 2000s is the sweet spot.

here:
http://www.techreaction.net/2010/09/07/3-step-overclocking-guide-bloomfield-and-gulftown/ miahallen knew his stuff.

 

[INSTG8R]

Actually Ivy Bridge was when 1.5 became spec, Sandy Bridge was 1.6. G.Skill actually had it printed on the Ram I bought that it could not be used in older systems, and there were forum threads about it at the time.

Sandy was 1.5...That is what I was using (Corsair Vengence 1600 1.5V) It wouldn't have been available for me to use if it started with Ivy..

 

[Caring1]

Sandy was 1.5...That is what I was using (Corsair Vengence 1600 1.5V) It wouldn't have been available for me to use if it started with Ivy..

You might be right.
I do remember, that G.Skill Ripjaws Ram used on Sandy Bridge could not be used on the new Ivy Bridge boards when it came out, there was articles about it and a big deal made about the new Ram released for the new chip. Like I said previously, it was on the packaging that it was compatible for Ivy Bridge and newer Motherboards.
Maybe that was just marketing to get people to buy new stuff.

 

[INSTG8R]

You might be right.
I do remember, that G.Skill Ripjaws Ram used on Sandy Bridge could not be used on the new Ivy Bridge boards when it came out, there was articles about it and a big deal made about the new Ram released for the new chip. Like I said previously, it was on the packaging that it was compatible for Ivy Bridge and newer Motherboards.
Maybe that was just marketing to get people to buy new stuff.

Yeah P67 was the first 1155 Board/Chipset and was definitely 1.5V But it was definitely a confusing time for RAM because of it.

 

[jsfitz54]

I prefer to run command rate 1T, i will try this settings: 9-11-9-27

You should try 9-9-9-24 if OK then
drop to 8-8-8-(24 auto)
7-8-8-24
7-8-7-24
7-7-7-(? auto)

 

[FireFox]

You should try 9-9-9-24 if OK then
drop to 8-8-8-(24 auto)
7-8-8-24
7-8-7-24
7-7-7-(? auto)

9-9-9-24 are the settings that i am using, I will try the 8 and if works the 7.

Btw, my Ram is rated 1.5V but i have it auto and the bios set it at 1.68V, isn't that too much?

 

[eidairaman1]

9-9-9-24 are the settings that i am using, I will try the 8 and if works the 7.

Btw, my Ram is rated 1.5V but i have it auto and the bios set it at 1.68V, isn't that too much?

The ram is fine with voltages. Dont worry about that.

 

[FireFox]

The ram is fine with voltages. Dont worry about that.

I have read somewhere that Ram degrade faster than other components.

I guess that the Ram it's not that happy running with those extra voltages, plus for sure they run hotter.