Corsair Memory Not Hitting 2000MHz.

Speirs · 24 Dec 2010 at 16:54

Hi.
I have this memory http://www.overclockers.co.uk/showproduct.php?prodid=MY-279-CS&groupid=701&catid=8&subcat=1392 and installed on a i7 950 oc'd to 4.25 on an Asus Rampage II Extreme Intel X58 mobo.
Any idea what settings I have to change for it to hit 2000MHz?

Thanks in advance.

cammy5477 · 24 Dec 2010 at 20:55

i have that ram also....it is difficult to get it to those settings whilst keeping the cpu that high.....if you look in your bios you will see dram freqencies...go in there and you will be able to play with the bclk and watch the ram settings change...choose the settings nearest 2000mhz and slowly increase the bclk....it just takes alittle bit of time and tweaking......i settled at 1925mhz on it as it allows me to keep my 980x at 4.55ghz...ive had my ram to 2100mhz but the clock on the chip was at 4.1ghz or something so its just about getting a balance where your happy

d3m0n_edge · 25 Dec 2010 at 21:55

I'm running mine at the full whack of 2000MHz with my 920 at 4GHz on my Rampage II Extreme. BCLK of 200 with a multiplier of 20, with the memory set to 2000MHz (2005MHz according to the mobo).

Speirs · 26 Dec 2010 at 11:58

Many thanks for the replies.
Demon, what voltages have you got to get it to 2005MHz.
I put in your settings but it wouldn't boot.
Cheers.

1Day · 26 Dec 2010 at 13:21

The ram will work at the XMP settings if your CPU can do the BLK. And nearly all can.

The XMP profile will automatically set your ram voltages, amongst others too.

d3m0n_edge · 26 Dec 2010 at 20:16

Settings for my overclock using this hardware with bios 1914:

Asus Rampage II Extreme
Intel Core I7-920 D0
Corsair Dominator GT 6GB DDR3

CPU: 1.23125
PLL: 1.81592
QPI: 1.50000
DRAM : 1.65

DRAM Timing: 8-9-8-24

The rest of the settings are left on auto.

I initially started with:

CPU: 1.35
PLL: 1.96
QPI: 1.53

But have managed to tune the voltages down where my system doesnt fail Prime95 or Intel Burn Test. Mind you, my CPU is cooled via water.

Amidar · 28 Dec 2010 at 00:05

I would knock that qpi voltage down to 1.35v or it's bye bye cpu's memory controller.

ViRuS2k · 28 Dec 2010 at 09:58

Amidar said:
I would knock that qpi voltage down to 1.35v or it's bye bye cpu's memory controller.

Thats utter trash lol

if you have 2000 memory your not going to hit it with a low QPI voltage its as simple as that.
my memory requires high QPI to get it stable at 2000 with extreme tight memory timings of 7.8.7.21 T1

though the memory im usings is very high speed binned Elphia BBSE ocz blades 2000 c9 stuff

they dont make this type of IC anymore.

Amidar · 28 Dec 2010 at 12:04

What ever

I've allready killed a 920 cpu by putting 1.5v qpi through it, granted it took 9 months to kill it.

d3m0n_edge · 28 Dec 2010 at 20:07

Intel's max spec for the QPI is 1.45. I manually set mine to 1.53v because of the droop. I checked the current running voltages through the bios where 1.53 actually gives me 1.455v which allows me to run my RAM at its intended spec.

Justintime · 28 Dec 2010 at 20:14

d3m0n_edge said:
Intel's max spec for the QPI is 1.45. I manually set mine to 1.53v because of the droop. I checked the current running voltages through the bios where 1.53 actually gives me 1.455v which allows me to run my RAM at its intended spec.

QPI voltage max by Intel is 1.35v, not 1.45v. Wouldn't really run 1.5v tbh, opinions vary. I only needed 1.375v for 24GB Ripjaw memory @ 1600 7 8 7, with cpu at 3.8Ghz.

ViRuS2k · 28 Dec 2010 at 20:51

Amidar said:
What ever

I've allready killed a 920 cpu by putting 1.5v qpi through it, granted it took 9 months to kill it.

Dont roll your eyes at me..
im not surprised you killed your chip running 1.5v lol when i was saying high QPI i will talking about 1.4-1.44v MAX lol

Amidar · 28 Dec 2010 at 21:34

That's a roll eyes.

Also the 1.5v was in bios, which by the time you add v-droop this would be around 1.45v (This was on a Rampage II Extreme).

ViRuS2k · 29 Dec 2010 at 02:11

Amidar said:
That's a roll eyes.

Also the 1.5v was in bios, which by the time you add v-droop this would be around 1.45v (This was on a Rampage II Extreme).

Im talking about QPI voltage not Vcore voltage.

You do know QPI/DRAM/VTT is your Uncore Voltage right lol and that voltage does not have VDROOP.

Justintime · 29 Dec 2010 at 02:25

Amidar said:
That's a roll eyes.

Also the 1.5v was in bios, which by the time you add v-droop this would be around 1.45v (This was on a Rampage II Extreme).

d3m0n_edge said:
Intel's max spec for the QPI is 1.45. I manually set mine to 1.53v because of the droop. I checked the current running voltages through the bios where 1.53 actually gives me 1.455v which allows me to run my RAM at its intended spec.

Yeah i think these two fellas are talking vcore..I don't use the motherboard software, does the Asus suite have QPI voltage monitoring?

ViRuS2k · 29 Dec 2010 at 02:43

Justintime said:
Yeah i think these two fellas are talking vcore..I don't use the motherboard software, does the Asus suite have QPI voltage monitoring?

Yes the asus extreme software has QPI/DRAM voltage monitoring. though there is settings the bios to eliminate vdrooping on the cpu voltage *load line calibration* enabled no vdroop disabled intel spec.

though UNCORE voltage named : CPU VTT / QPI/DRAM voltage does not have Vdroop.

Justintime · 29 Dec 2010 at 02:52

Yea i tend not to use dampening, heard and read a fair few bad things in the 775 days and i keep vdroop and just find the stable non dampened voltage. I'm aware things have likely gotten better in that respect with i series boards, just me being cautious i suppose.

Amidar · 29 Dec 2010 at 09:14

No i'm talking qpi voltage my cpu's voltage was set at 1.35v with llc enabled & my qpi voltage was set at 1.5v but this used to drop for some odd reason.

And yes virus i know the difference between the 2 as i've owned an x58 board since december 2008 when the came out :rolleyes:

d3m0n_edge · 29 Dec 2010 at 09:49

I read an article somewhere I can't remember now, something relating to overclocking 1366 I7s on X58 boards.

Well either way, I'm open to suggestion as I'm here for support and to learn. The first time I hooked up the Dominator GTs, I laoded the XMP and the profile set my QPI to 1.53. I'll try 1.35 and see what happens.

ViRuS2k · 29 Dec 2010 at 13:07

Amidar said:
And yes virus i know the difference between the 2 as i've owned an x58 board since december 2008 when the came out

Your rolling those eyes again.

Clearly something was wrong with your motherboard and damaged the cpu with your settings.
i have done extensive searches on loads of various forums and if you keep the 0.5v spec between uncore voltage and dram voltage you shouldnt have any issues with VTT/QPI/DRAM voltage @1.4-1.44v hell there is people running there uncore voltages at 1.56v up to max 1.6v and been doing that for 6+months and they have no issues and thats on air aswell.

My screenshot speaks for its self if you want to be able to run 2000 memory at spec with tight timings your going to need to bump the QPI/DRAM/VTT above 1.4. simples.
the reason why you need that much voltage for 2000 is to stabilize the 4000 uncore that you need for 2000 to operate.