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Sandy Bridge Overclockers BEWARE! People have killed CPUs already! BCLK OC IS A NO-NO

post #1 of 21
Thread Starter 
Guys, I just came upon this when reading overclockers.co.uk!

As a future SB user (waiting for my stuff), I felt the need to share this with everyone.

Quote:
Sandybridge maximum safe voltages

Core Voltage - Not recommended too exceed 1.38v, doing so could kill the CPU, we therefor recommend a range of 1.325-1.350v if overclocking.

Memory Voltage - Intel recommend 1.50v plus/minus 5% which means upto 1.58v is the safe recommended limit. In our testing we have found 1.65v has caused no issues.

BCLK Base Clock - This is strictly a NO, anyone using base clock overclocking could/will cause damage to CPU/Mainboard. (Set manually to 100).

PLL Voltage - Do not exceed 1.9v!!



Processor - Basically we recommend customers not to exceed 1.35v to play it safe, all our bundles are set at 1.3250v or lower, any competitors offering bundles above 4.6GHz you should be enquiring as to what voltage they are using as we believe anything over 1.38v will limit CPU lifespan and anything over 1.42v will likely kill the CPU or severely limit its lifespan.

Memory - Intel recommend 1.50v plus/minus 5% which means 1.60v is the ideal safe maximum, but we have found in our testing all 1.65v memory is fine. We have also found most new 1.65v like Corsair XMS3 will run at its rated timings with just 1.50-1.55v which is well within Intel specifications. So people upgrading to Sandybridge you can still use your old DDR3, but we do recommend you run it at 1.60v or less. We are shipping most of our bundles which feature Corsair XMS at 1.50v-1.55v at rated timings. We've also discussed with Asus and MSI regarding voltages for memory and they also confirm in their testing 1.65v caused no issues with reliability.

Base Clock - To put it simple if you value the life of your components, do not overclock using base clock!

PLL Voltage - Again do not exceed 1.9v!

Source

Looks like EXTREME care is necessary with these CPUs, and BCLK Overclocking seems to be a no go.

Be careful, fellow SB users.
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post #2 of 21
Already been posted
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post #3 of 21
Thread Starter 
Quote:
Originally Posted by TickleMeElmo View Post
Already been posted
Didn't see it anywhere, sorry
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post #4 of 21
I take it you can't OC the CPU on H67 mobo's?
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post #5 of 21
Quote:
Originally Posted by SSJVegeta View Post
I take it you can't OC the CPU on H67 mobo's?
You can, if you want to OC the BCLK. But that's your choice, the only thing that is officially supported for OC is the GPU multiplier. The BCLK is on your own so if you fry your board or CPU at 105 BCLK, oh well. But H67 is a no go for overclocking. If you want both support for overclocking CPU/GPU then wait for Z68.

You either pick H67 for HTPC or go P67 for mainstream gaming and overclocking and of course 980X like CPU performance for applications.
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post #6 of 21
Quote:
Originally Posted by anoob View Post
You can, if you want to OC the BCLK. But that's your choice, the only thing that is officially supported for OC is the GPU multiplier. The BCLK is on your own so if you fry your board or CPU at 105 BCLK, oh well. But H67 is a no go for overclocking. If you want both support for overclocking CPU/GPU then wait for Z68.

You either pick H67 for HTPC or go P67 for mainstream gaming and overclocking and of course 980X like CPU performance for applications.
z68 -> estimated arrival?
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post #7 of 21
Quote:
Originally Posted by uKnighted View Post
z68 -> estimated arrival?
Supposedly Q2 2011. No guarantees though.
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post #8 of 21
someone posted this over at XS, and got his ass ripped apart. he was the writer of the article too, they don't take it easy on you over there.
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post #9 of 21
Ya I and others said you take 32nm CPU's and try to run them at the same voltage as 45nm you're gonna fail.

Old.
post #10 of 21
bulldozer won't have that problem
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