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1366 X58 Xeon 5650

OK so x5670 on x58a-UD3R revision 1 bios f8b

[voltage Setting]
LLC - set to Auto - with my i7 920 I had it at Standard
Vcore - 1.39375V - This is actually 3.76v after drop and 1.360v when under full load.
QPI/VTT = 1.355v
Dram at 1.660V
Everything else is at auto

My i7 920 required adjusting other voltages to get it stable but this chip was much easier.
make sure you start from default because my xeon was not stable if I copied my i7 voltages for PLL etc

[Frequency Setting]
Ratio x22
Turbo - Disabled
QPI Clock - x36
Uncore Clock x17
BCLK - 201
xmp Memory profile [profile1]
memory multiplier - x8

[memory Setting]
Performance enhance - Standard

Was a lot easier than my i7 to overclock.
I found if the cpu voltage in cpu-z dropped below 1.360v under load I would run into errors/crashes in prime/ IBT
 
Very helpful Weldon thank you! I've not yet worked out whether I'm on a Rev 1 or Rev 2 but will get that sorted asap!

I too have all manner of stuff tweaked on my i7 920 as 4g.2 ghz wasn't all that straight forward. Will note it down, reset and go from there.
 
weldon855 said:
OK so x5670 on x58a-UD3R revision 1 bios f8b

[voltage Setting]
LLC - set to Auto - with my i7 920 I had it at Standard
Vcore - 1.39375V - This is actually 3.76v after drop and 1.360v when under full load.
QPI/VTT = 1.355v
Dram at 1.660V
Everything else is at auto

My i7 920 required adjusting other voltages to get it stable but this chip was much easier.
make sure you start from default because my xeon was not stable if I copied my i7 voltages for PLL etc

[Frequency Setting]
Ratio x22
Turbo - Disabled
QPI Clock - x36
Uncore Clock x17
BCLK - 201
xmp Memory profile [profile1]
memory multiplier - x8

[memory Setting]
Performance enhance - Standard

Was a lot easier than my i7 to overclock.
I found if the cpu voltage in cpu-z dropped below 1.360v under load I would run into errors/crashes in prime/ IBT
Click to expand...

Thanks mate, I'll give that a go.
 
Do you get away with 1.4v on air or are you on water?

Also what would you recommending as a starting point?
 
Ste said:
Do you get away with 1.4v on air or are you on water?

Also what would you recommending as a starting point?
Click to expand...

just make sure to check the temperatures should be fine.
Im using a h100i cooler but some air coolers are just as good as it.
prime temps max at 80. bf4 mid 60s.

leave vcore at auto and see if 200x20 is stable.
if its not then bump up vtt until it is. load cpu-z and note the vcore voltage there and use it as a starting point + 1 or 2 notches to allow for drop.

then change multi to 21 and start increase vcore to get it stable.
check your temperatures when testing especially as you bump the voltage up.
make sure your ram is not being overclocked.
 
Last edited:
I was hoping the CPU would turn up today. Alas not, still at least I am on holiday next week so will have plenty of time to tinker.

Has anyone here tried OCing one of these on a Sabertooth MB?
 
Sabertooth here and have mine clocked to 4ghz (200blk) and have disabled turbo (can't be bothered to try and get it stable when it on). I think I'm on 1.29v core but I will check and post later.
 
Ok thanks will try that.

Have a noctua d14 so should be reasonable. My 920 needs 1.36v to be stable at 4.2 which gets to about 80 though So may not have much headroom.
 
Bloody hell, like today wasn't dragging slowly enough already being last day before a week and a bit off, just got a message from my other half to say the X5670 has arrived.
 
Can you get 4.2 stable with 21x200?

I know you are working the bclk to clock but be interesting to see if the chip is happy at those speeds. Certainly not got anywhere to really go voltages wise.

what's the top vcore on these Xeons?

Edit: Intel suggest max 1.35v
 
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Well she is all tucked in and being kept at a rather staggering 16-18 degrees at 3.2ghz

Let me start tinkering, it's been about 3 years since I last overclocked and that was the old 950.

Let me see what I can dislodge in the memory department.
 
Well, there's definite promise in this one. Got 4.2ghz stable, with max temps in prime at 61degrees on 1 core, reality was averaging at closer to 56 degrees.

got into windows at 4.4 vcore at 1.32 ish idle at about 37/38 ish. Got 2 random bsod with weird stop codes

Max bck topped out at 220.

thinking bsod might he qpi volt related.
 
Batfink1892 said:
Well, there's definite promise in this one. Got 4.2ghz stable, with max temps in prime at 61degrees on 1 core, reality was averaging at closer to 56 degrees.

got into windows at 4.4 vcore at 1.32 ish idle at about 37/38 ish. Got 2 random bsod with weird stop codes

Max bck topped out at 220.

thinking bsod might he qpi volt related.
Click to expand...

Up your vcore, 1.32v is too low for 4.4 I think.

I'd try 1.35-1.38v

Qpi 1.35-1.375v
 
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