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post #341 of 399
Quote:
Originally Posted by whatsthatsmell View Post
Doesnt Uncore have to be equal voltage as Vcore?
Does it? Which guide are you looking at? I looked at 3 or 4 of them and don't remember seeing that. It does make sense now that I think about it, since both the core and uncore are getting affected equally by the base clock.
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post #342 of 399
Batch 3847A764

Does 4.5GHz@1.48v
24/7 settings 4.2GHz@1.32v

What do you think guyz?
LL
Edited by imo - 8/28/09 at 6:37am
post #343 of 399
Quote:
Originally Posted by aph View Post
Does it? Which guide are you looking at? I looked at 3 or 4 of them and don't remember seeing that. It does make sense now that I think about it, since both the core and uncore are getting affected equally by the base clock.
They are both affected but vary from processor to processor. Uncore is part of the cpu that consists of the integrated mem controller and L3. Some processors might not have as good quality mem controller and require more voltage (VTT) when overclocking while others might have better IMC requiring less increase in voltage. Long story short - they can be the same or different and vary from cpu to cpu.
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post #344 of 399
Quote:
Originally Posted by imo View Post
Batch 3847A760

Does 4.5GHz@1.48v
24/7 settings 4.2GHz@1.32v

What do you think guyz?
not bad
what temps i wanna try that Speed but my temps are to high
maybe when i get watercooling
nice OC
is it stable.
if it is i will
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post #345 of 399
Quote:
Originally Posted by sanjuroM View Post
They are both affected but vary from processor to processor. Uncore is part of the cpu that consists of the integrated mem controller and L3. Some processors might not have as good quality mem controller and require more voltage (VTT) when overclocking while others might have better IMC requiring less increase in voltage. Long story short - they can be the same or different and vary from cpu to cpu.
I tried out matching the Uncore volts to the Vcore and this only made things more unstable. For whatever reason, raising the Uncore voltage on my setup is causing Prime95 fails before 1 set. Any ideas as to why would be appreciated.
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post #346 of 399
Quote:
Originally Posted by bluebunny View Post
not bad
what temps i wanna try that Speed but my temps are to high
maybe when i get watercooling
nice OC
is it stable.
if it is i will
Yes it is stable @4.5GHz, The Batch is 3847A764 confirmed.

84-90C max 4 cores temp on after prime95 1 hour.

But 24/7 use never stress the cpu that much as prime does!

24/7 temp are
38c-42c idle and 78c-82c load
Water cooling


On air does 4.2GHz with 1.32 volt temp @ idle 45C @ load 82C max after priming

Temp monitored with Real temp 3.30
Edited by imo - 8/28/09 at 6:40am
post #347 of 399
Quote:
Originally Posted by aph View Post
I tried out matching the Uncore volts to the Vcore and this only made things more unstable. For whatever reason, raising the Uncore voltage on my setup is causing Prime95 fails before 1 set. Any ideas as to why would be appreciated.
Prime95 or Linx errors are an indication of too hi VTT. You don't need to raise VTT unless you are raising your BCLK some more or switching to a different memory divider that would result in a higher Uncore and even then VTT might not need to be raised, it depends on the stability tests after.
Edited by sanjuroM - 8/28/09 at 11:07am
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post #348 of 399
Quote:
Originally Posted by sanjuroM View Post
Prime95 or Linx errors are an indication of too hi VTT. You don't need to raise VTT unless you are raising your BCLK some more or switching to a different memory divider that would result in a higher Uncore and even then VTT might not need to be raised, it depends on the stability tests after.
A Prime95 fail is an indication of too high a voltage? I thought the main cause was too high of a BCLK with not enough voltage, and that too much voltage would just produce extra heat/shorten lifespan.
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post #349 of 399
Quote:
Originally Posted by aph View Post
A Prime95 fail is an indication of too high a voltage? I thought the main cause was too high of a BCLK with not enough voltage, and that too much voltage would just produce extra heat/shorten lifespan.
It possibly could be. Too high of a VTT isn't good because it increases signal noise.
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post #350 of 399
Quote:
Originally Posted by aph View Post
A Prime95 fail is an indication of too high a voltage? I thought the main cause was too high of a BCLK with not enough voltage, and that too much voltage would just produce extra heat/shorten lifespan.
Too low voltages normally gives BSODs, "Machine Check Exceptions", 0x124 error in Vista, or POSTing failures.
Too hi voltages can be as much of a problem as too low voltages besides just heat.
If it's stable and you haven't raised BCLK or changed ratios there is really no need to raise voltages - that's contrary to overclocking. In fact you want to see if you can get away with lower voltages.
If stable then lower voltage else
if not stable raise voltage (at the risk of oversimplifying things).
Repeat the above till it's finally stable and you pretty much finetuned your oc.
Edited by sanjuroM - 8/28/09 at 11:59am
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