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Old 09-27-11, 09:00 AM   #1
nekrosoft13
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Default Help OC with new Ram

Yesterday I bought new ram, 16GB of corsair vengence (since 16gb set of same ram was cheaper then 12gb set)

anyway its 1600mhz ram, and having trouble getting my i7 stable on them.

before I had my i7 920 at 182x20 (3640mhz), forgot the ratio, but before with my OCZ ram, I had it running at around 1500mhz, uncore was set to around 3100mhz.

I tried to go higher with the corsair, since its faster ram, but that sends my uncore to 3600mhz and up, and system will BSOD on windows logon.

i was able to get the system stable yesterday at 200x19 (3800mhz), and ram is at 1600mhz now, but that might put stress on my vreg temps.

anyone had a similar system oc experience
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Old 09-27-11, 09:19 AM   #2
ViN86
 
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Default Re: Help OC with new Ram

Can you set your uncore multiplier? Or is it handled by the BIOS? Or is the problem your uncore can't handle the 3600 MHz required when your RAM is running at 1800?

Just as a reminder, make sure your uncore is at least twice the RAM speed.
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Old 09-27-11, 09:57 AM   #3
nekrosoft13
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Default Re: Help OC with new Ram

I can set uncore, but i believe it can't handle more then 3400mhz
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Old 09-28-11, 09:47 AM   #4
nekrosoft13
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Default Re: Help OC with new Ram

still to early to be 100% sure. but i think i found good setting.

200x19 (3800mhz) uncore at I believe 3400ish mhz.
ram at 1600mhz 1.5v

just have to add a fan, to the mosfets (vreg), those temps get little high when in torture test, but still in safe zone.
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Old 09-28-11, 09:55 AM   #5
ViN86
 
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Default Re: Help OC with new Ram

Quote:
Originally Posted by nekrosoft13 View Post
still to early to be 100% sure. but i think i found good setting.

200x19 (3800mhz) uncore at I believe 3400ish mhz.
ram at 1600mhz 1.5v

just have to add a fan, to the mosfets (vreg), those temps get little high, but still in safe zone.
If you can set your uncore, you can get it down to 3200 MHz if you have the multiplier for it.
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Old 09-28-11, 10:38 AM   #6
nekrosoft13
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Default Re: Help OC with new Ram

Quote:
Originally Posted by ViN86 View Post
If you can set your uncore, you can get it down to 3200 MHz if you have the multiplier for it.
i could set it to 3200mhz, so far seems stable. not sure how big of impact 3200 vs 3400ish bring.

will try to add a fan, and see if i can cool the vreg a bit. I have the C0 version of i7 920 btw.
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Old 09-28-11, 10:46 AM   #7
ViN86
 
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Default Re: Help OC with new Ram

Quote:
Originally Posted by nekrosoft13 View Post
i could set it to 3200mhz, so far seems stable. not sure how big of impact 3200 vs 3400ish bring.

will try to add a fan, and see if i can cool the vreg a bit. I have the C0 version of i7 920 btw.
Overclocking the uncore usually doesn't offer any significant performance gains. Just leave it at 2x DDR speeds, the required minimum. No point in risking stability for little to no gain.
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Old 09-28-11, 12:09 PM   #8
nekrosoft13
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Default Re: Help OC with new Ram

ok, will lower it when i get home.

really waiting for new x78 (or 79) boards, I want to update with SATA III and USB 3 but don't want to waste time with sandry bridge (just a small backwards steping stone)
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