Xeon Hacking and Overclocking X79/X99 [Beyond X58] - Page 29 - Overclock.net

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post #281 of 1557 Old 06-17-2016, 12:33 AM
 
 
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Quote:
Originally Posted by jakethesnake438 View Post

Has anyone got a e5-1680/V2 in their system?
I miss my e5-1650 @4.2+ dearly

Still have my 1680 V2:



Only bench stable at this speed and volts. I can run all benchies like 3dmark at this speed with 1.4v under normal ambient and water. Need winter weather to get 5GHz.

24/7 I run it 4.5GHz with 1.275v, ram @2666MHz CL10 on custom water. Really is a nice cpu.smile.gif

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post #282 of 1557 Old 06-17-2016, 02:45 AM
 
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That is strange !! the CPU reference indicates both 2690V2 and 1680V2 in CPU-Z .
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post #283 of 1557 Old 06-17-2016, 07:57 AM
 
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Here is what I think about unlocking the dual socket Xeons for OC,

1) all of the unlocked Xeons have i7 counterparts (1680v2 is an exception, E5-1603 and E5-1607 cannot OC due to not having a similar i7 counterpart), meaning they have similar CPU config that Intel Management Engine sees them as basically same thing, this may be related to the CPUID that is recognized in the BIOS

2) since there are 2 QPIs, we can try and block the contacts for the 2nd QPI links to make them similar to their i7 counterparts.
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post #284 of 1557 Old 06-17-2016, 02:56 PM
 
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@gofasterstripes, it seems that very little of X79 owners are eager doing some research on unlocking 2xxx xeons oc capabilities...... strangely...
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post #285 of 1557 Old 06-18-2016, 01:43 AM
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Quote:
Originally Posted by Beufesamiteur View Post

That is strange !! the CPU reference indicates both 2690V2 and 1680V2 in CPU-Z .

Yep, because the 1680v2 is a 2690v2 with some qpi's and cores disabled if I remember right.

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post #286 of 1557 Old 06-18-2016, 01:47 AM - Thread Starter
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Oh come on then! Hasn't anyone got a spare 2670 and some kapton tape??
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post #287 of 1557 Old 06-18-2016, 02:01 AM
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Quote:
Originally Posted by gofasterstripes View Post

Oh come on then! Hasn't anyone got a spare 2670 and some kapton tape??

Well to start, you'd need a 2690v2, which is even more expensive than the 1680v2 and then there is still no clue how to disable the qpi links and cores. Could just start taping the bottom of the chip up and see what happens, I really have no interest in experimenting in that way with my board though.. Maybe when there are some 2011 boards for $50 or something. biggrin.gif

Would be nice if someone could get straps to work on locked chips though, that could help quite a bit. smile.gif

Edit:
Here's something that someone could try on x58:
http://www.overclock.net/t/1469242/could-i-disable-a-xeons-second-qpi

No idea if it's ever been tried, but hey, if you cover those pins and end up with an unlocked x5650 then maybe it's also possible on x79? biggrin.gif

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post #288 of 1557 Old 06-18-2016, 04:46 AM - Thread Starter
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I'd say it's worth a go with any of the dual QPI chips.

Based on some previous research into QPI topology, I don't think it's dangerous to actually straight-up block pins used for QPI signalling alone - the bus has per-channel error detection [ie QPI connections are actually multiple single-channel buses in parallel, each with error-monitoring AFAIK]. They have fallback fail safes, and if I had to guess I would say it doesn't look like it would cause damage to insert a CPU with modded QPI connections or even ones that were NOT fully blocked - the bus should just detect the dirty contact and switch off.

I have to say though, anyone trying that is taking a risk.

But go on, someone wink.gif

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post #289 of 1557 Old 06-18-2016, 05:33 AM
 
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Just read through this thread.. makes me want to pick up a board and xeon chip to play around with.

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post #290 of 1557 Old 06-18-2016, 07:36 AM
*cough* Stock *cough*
 
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I wish I could unlock my Xeon E5-2637 v3 and push it up to around the 4.4 GHz mark. Then I wouldn't be feeling like I need to buy a new 4.4 GHz i7 6800k from Silicon Lottery so badly... 3.4 GHz stock is just so low these days.

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