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Xeon Hacking and Overclocking X79/X99 [Beyond X58]

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post #1781 of 1791 (permalink) Old 05-13-2019, 05:02 PM
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Just grabbed a 1680 v2 since they dropped to the $200 range and also because I recently acquired a X79-Deluxe for $75. My current machine is a 6800k + X99-A II with 32gb Samsung B-Die but it has not been a very pleasant experience. I feel when Zen 2 comes on the market it will cannibalize the X99 platform and unless you're running with a top of the line Mobo + 6950X, these components are going to drop drastically in price. I'll sell off my X99 Mobo + CPU, make a few dollars, and get to play around with this X79 8 core until I see where all the next gen Zen 2 chips land.

Anyway, I tried running 8 x 2GB 1600mhz CL6-8-6 1.5v on top of a 4.5ghz overclock and it became very temperamental. Was running at 1.35v core, 1.15 vccsa and 1.125 vtt @ 1.6v DRAM. Still have to catch up on this thread and find out what are safe voltages here and what people usually had to use to get overclocks stable with all 8 DIMM's populated. It would boot normal after applying the overclock, be stable, and then boot loop after I tried to restart, sitting on error code 19 for a few seconds before restarting. I would have to power cycle the machine, it would tell me the overclock failed, I wouldn't change any settings, and the computer would start up perfectly fine... Rinse and repeat. If my only chance of hitting 2133+ mhz on the RAM is with only 4 slots populated then I'll have to go that route with some 8GB LP Ballistix modules.

And am I reading this correctly? The CPU I have was made in 2017??? They were still making Ivy-E that recently?
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post #1782 of 1791 (permalink) Old 05-14-2019, 04:24 AM
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Quote: Originally Posted by xenkw0n View Post
Just grabbed a 1680 v2 since they dropped to the $200 range and also because I recently acquired a X79-Deluxe for $75. My current machine is a 6800k + X99-A II with 32gb Samsung B-Die but it has not been a very pleasant experience. I feel when Zen 2 comes on the market it will cannibalize the X99 platform and unless you're running with a top of the line Mobo + 6950X, these components are going to drop drastically in price. I'll sell off my X99 Mobo + CPU, make a few dollars, and get to play around with this X79 8 core until I see where all the next gen Zen 2 chips land.

Anyway, I tried running 8 x 2GB 1600mhz CL6-8-6 1.5v on top of a 4.5ghz overclock and it became very temperamental. Was running at 1.35v core, 1.15 vccsa and 1.125 vtt @ 1.6v DRAM. Still have to catch up on this thread and find out what are safe voltages here and what people usually had to use to get overclocks stable with all 8 DIMM's populated. It would boot normal after applying the overclock, be stable, and then boot loop after I tried to restart, sitting on error code 19 for a few seconds before restarting. I would have to power cycle the machine, it would tell me the overclock failed, I wouldn't change any settings, and the computer would start up perfectly fine... Rinse and repeat. If my only chance of hitting 2133+ mhz on the RAM is with only 4 slots populated then I'll have to go that route with some 8GB LP Ballistix modules.

And am I reading this correctly? The CPU I have was made in 2017??? They were still making Ivy-E that recently?
I wonder where did you find e5 1680v2 200 dollars a pop?
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post #1783 of 1791 (permalink) Old 05-14-2019, 09:22 AM
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Quote: Originally Posted by ahujet View Post
I wonder where did you find e5 1680v2 200 dollars a pop?
Ebay... The one listed for 240 from the seller who has buy it now. Offered 175, they countered with 225, I offered 200, they accepted.
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post #1784 of 1791 (permalink) Old 05-14-2019, 10:40 AM
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Yup, got mine on ebay as well. Was listed for $299, offered $200, they accepted, happy camper.

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post #1785 of 1791 (permalink) Old 05-14-2019, 12:11 PM
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So I very quickly found this apparent 2400mhz memory bug with 100mhz strap - The posts I found related to this were from 2014. Is this still a thing? Is there a fix or something I should be doing to get 2400mhz memory write bandwidth taken care of?
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post #1786 of 1791 (permalink) Old 05-14-2019, 01:22 PM
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Are you experiencing it?

Most of that stuff has been resolved (to at least some degree) with the BIOS updates

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post #1787 of 1791 (permalink) Old 05-14-2019, 01:26 PM
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Quote: Originally Posted by deafboy View Post
Are you experiencing it?

Most of that stuff has been resolved (to at least some degree) with the BIOS updates
I am indeed. BIOS 4805 on X79-Deluxe. When I first set to 2400mhz CL10 and ran AIDA64 the numbers were around 65-70k across the board. After restarting and other stuff I went back to AIDA64 and the write speeds dropped to 40k and latency up from 50ns to 55ns.
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post #1788 of 1791 (permalink) Old 05-17-2019, 08:07 AM
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Hi guys, I'm testing for oc a Xeon e5 2680v2.


I'm on a Gigabyte x79 up4
4 x 8GB ddr3 hyperx 1867Mhz 1.656v
GTX 1080
Noctua NH15
EVGA G2 850w Gold



Seems stable (14+ hours of Prime95, still running):


BCLK: 114.00Mhz
Vcore: 1.15
Max temp: 53° C
Peak Power: 132.35W



yesterday I tested 115Mhz BCLK at 1.180 Vcore, but it started to boot loop.


I'm open to advise that can help me to push it a bit up with the frequencies. I will update this post while testing
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post #1789 of 1791 (permalink) Old 05-18-2019, 08:58 AM
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Took a bit to realize my mobo was setting very aggressive tertiary timings when overclocking into the 2133 and 2400mhz range. I had to loosen them up a bit to not get errors in memtest. I will say this 1680v2 runs hotttttttttt.
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post #1790 of 1791 (permalink) Old 05-20-2019, 03:32 PM
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It seems like LLC does more harm than good unless pushing serious overclocks because these chips get pretty warm well before pushing into the 1.4v+ range.

Settled my 4.4ghz overclock with LLC off and under stress it bounces between 1.264 and 1.28v. Without being fully taxed it hits up to 1.32v and overall there's just no need for LLC in this instance. If I wanted to push to 4.6 I could see it becoming useful but even at 4.5ghz and LLC off, 1.4v works as it droops down to 1.328 territory. I found myself using .02 additional turbo voltage to help combat the serious vDroop on this X79-Deluxe board.

Memory tightening is going to be a lot longer of a process than it normally would be because the system wasn't setting tertiary timings lax enough for me to just worry about what could be causing instability in the other timings. Was getting memtest errors (not a lot, but I don't want any...) with auto settings on my third timings and they went away after I loosened them up. Just means there's gonna be some small adjustments and then daily memtest runs when I'm at work until I hone in on what my sticks can do without risking data corruption. Bumping the voltages wasn't helping, they were way too tight... the memory training is impressive on this board but the memory is good enough to operate for initial boot with the aggressive timings. We're talking 1-2-3 and a few 0 timings set in the tertiary ones. None of them get set over 4 even on auto when setting to 2133 or 2400mhz.
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