ok , here is some linx test # for the SR-2 with 2x 5680.
 
I haven't tighten the voltages yet on the x5680, because I hitted a voltages wall @ around 4.5GHz. and the settings is without vdroop with 2:10 memory divider ( 1333MHz in the SR2 Bio ) Turbo mode is enabled ,

The Uncore on the x5680 is LOCKED!!!!!!!! so its required higher vtt as you upped the bclk
(especially with 2:10 memory divder). I can lower the vtt somewhat, but I would have to lower the ram to 2:8 to get it stable for the linx
 
Also I noticed a cooler mosfet temp help with bclk. and that can be done by couple of 120mm fan blowing on top, or simply lower the pwn freq in the bio from the highest settings to the lowest settings.
 
also this is aircooled, it is on a HOT side, because i have the system in the basement along with my other folding systems ( about 10 other folding farms ) and the room temp is about 90F at the time of testing. Also it is one of the reason for higher vcore, because of the heat. ( hotter cpu temp required higher vcore for stabilty )
 
I am still playing around with the settings for bigadv folding stabilty. because Linx or prime stabilty is crap compare to stabilty for bigadv folding.
 
linx / prime test passed is only 98% stable in my opinion. And bigadv folding stable is 99.99% in my opinion.
 
here is some # for review. 
 


173x26 with Ram @ 2:10
 
I may have to re-apply TIM on the CPU ( i was a little dot short on my tube when I installed the cpu and heatsink )


WB


I am currently running another test of linx 25x with VDROOP and cooler room temp. ( was 90F and now 78F room temp ) and yes the Temp is dropping along with my vcore.

will update any photo shoot in a few hours

Thanks for sharing WB!

Those are some great results being able to run LinX @ 4.5 GHz for both CPU's via air cooling. Due to the locked Uncore, it seems the x5680 would be the ideal choice for these high overclocks since it supports the higher core multiplier.

Ok, Higher bclk on the SR-2 and x5680

Same Vcore settings. But I have to bumped up the VTT to get stabity on linx test.

only 3 passes this time, as i have already done 25x before, so i am not wasting time on it, and just trying to figure out what is the highest bclk on 2X x5680

you can see the temp is lower then the prevoius test , due to lower room temp ( A/C is Cranking full BLAST for the past 6 hrs)

I was able to get it to POST with 205 bclk , BUT IT FREEZE during linx test. ( I think due to the locked uncore ) and Yes I have made adjustment to the bio for higher bclk. And It post with NO issue nor startup issue , until you torture test it.

I have no issue with 200 bclk on linx, So I am going to try 203bclk next . This uncore LOCKED is really getting on my nerves


200X22 with Ram 2:8


WB

DraginElite

nice .... when you get this fully dialed in for you perhaps you can post a guide in the folders section as to setting up the SR-2 for Linx folding and the such

YES SIR!

I will do that. I know everyone is waiting for a PPD results for this MONSTER MOBO. When I figure out what this cpu like and dislike, then I am going to do some Bigadv testing for folding, for all the EVGA folders @ the folding forum.

I aleady have a linux guide in the folding section for 8, 12 and 24 cores folding, but I will updates on the PPD when I get the results. And possible any issues on the SR-2 bigadv folding with uncore issues

WB

edited

Ok 203, 205 bclk and 2:8 or 2:10 RAM is a " NO GO" for me. The max stable bclk is 200 on my CPU with ram 2:8.
(frezze on 2:10) no matter what VTT I set to. ( up to 300mv ) or Dimm.  And that VTT is the most I am going to torture it on pair of x5680,

unless Microcenter sell a $200 version of the 56XX xeon , then I don't care. I will torture it all day and night.

lehpron

  I hope you weren't being serious with this.  Intel never meant these CPUs to be overclocked since SR-2 is the first and only example of an overclockable dual-socket after almost 14 months since the type debuted; I don't see how you can complain.  We got lucky (and spoiled) with unlocked uncores in cheaper Bloomfield models, but it isn't a standard across all 1366 CPUs.

I know, and understand these CPU aren't meant to be OC ( stabilty is the main focus for main server ) , and no other LGA1366 server mobo on the market today have this ability , beside the SR-2. But I got spoiled by the Bloomfield CPU. and I am just saying , I won't be suprised by Intel locking all their future CPU uncore, So that you will have to buy a higher multi CPU, than getting a cheap cpu and overclocking to their Extreme Edition.

WB