can't get the xeon e5-1660 v3 to 4.5 ghz - Overclock.net - An Overclocking Community
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can't get the xeon e5-1660 v3 to 4.5 ghz

 
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post #1 of 6 (permalink) Old 05-10-2020, 07:43 AM - Thread Starter
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can't get the xeon e5-1660 v3 to 4.5 ghz

hi,

I changed my old 5820k to an Xeon E5-1660 v3 (5960X).

I tried to overclok the new cpu but it's way harder than the 5820k, my skill for overcloking is terrible.

For now the Xeon is stable at 4.3 ghz, (test 3H with real-bench at 1.25V and up the voltage to 1.275 just to be sure), but i can't get 4.5 ghz, and even 4.4 ghz even at 1.3Volt(input at 1.95V). the rest of voltage are on auto.


at 4.4 ghz i have freeze and blue-screen, the temperature go above 80C

my configuration is
MSI x99 Sli plus
RtX 2080 8 Go
32 go of ram at 2666mhz
Corsair H110

what setting can i change to be stable at 4.5 ghz, or even 4.4 ghz or stay at 4.3 ghz but with a lower voltage like 1.2V,
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post #2 of 6 (permalink) Old 05-10-2020, 10:16 AM
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Hi

Welcome to OCN.

Quote: Originally Posted by cou60 View Post
hi,

what setting can i change to be stable at 4.5 ghz, or even 4.4 ghz or stay at 4.3 ghz but with a lower voltage like 1.2V,
Considering that you passed Realbench at 4.3 GHz 1.25v, it probably isn't realistic for your chip to do 4.5 GHz at only 1.2v. My guess is that you will need 1.36v or higher if you were lucky and that chip was able to do it at any given voltage, and considering you reached 80c already with a very average and gentle stress test at only 1.3v your cooling solution just isn't going to cut it at 1.36v+.
Try running the memory and cache at stock to make sure they aren't the reason behind the instability, put VCCIN at 1.95v and increase the load-line calibration by setting it a tier lower than the highest level to make sure that the chip is getting enough voltage supply from the voltage regulators.

Peace

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Last edited by HeadlessKnight; 05-10-2020 at 10:21 AM.
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post #3 of 6 (permalink) Old 05-10-2020, 06:37 PM - Thread Starter
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i have a EVGA CLC 280 on the way, i hope it will provide enough cooling, i tried setting the LLC to the second higest level, 4.4 ghz is still not stable,

i gonna try once again when i receive the new cooler. I am not lucky with the silicon lottery. i can holy hope that the instability is cause by the high cpu temps

i am a bit scared to go above 1.3V i am planning to keep the system until DDR5 arrive.
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post #4 of 6 (permalink) Old 05-10-2020, 06:47 PM
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1.3v isn't even in the ballpark of dangerous for 32nm so long as your temps are in check, even 1.4v is a bit conservative as a max voltage.

get your new cooler and give it a bit more voltage.

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post #5 of 6 (permalink) Old 05-21-2020, 02:22 PM - Thread Starter
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Quote: Originally Posted by HeadlessKnight View Post
Hi

Welcome to OCN.



Considering that you passed Realbench at 4.3 GHz 1.25v, it probably isn't realistic for your chip to do 4.5 GHz at only 1.2v. My guess is that you will need 1.36v or higher if you were lucky and that chip was able to do it at any given voltage, and considering you reached 80c already with a very average and gentle stress test at only 1.3v your cooling solution just isn't going to cut it at 1.36v+.
Try running the memory and cache at stock to make sure they aren't the reason behind the instability, put VCCIN at 1.95v and increase the load-line calibration by setting it a tier lower than the highest level to make sure that the chip is getting enough voltage supply from the voltage regulators.

Peace
I tried putting the VCCIn at 1.95V , 1.3Volt at the core and even with the cache as stock, I am not stable at 4.4 ghz. I think 4.3 is as fast as the cpu can go. Even with my the EVGA CLC 280 the temperatre are high. My case do not support 360 AIO


well I though that my 5820k at 4.4 ghz 1.3 Volt was bad.

thank for your help
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post #6 of 6 (permalink) Old 05-21-2020, 07:09 PM
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Quote: Originally Posted by cou60 View Post
I tried putting the VCCIn at 1.95V , 1.3Volt at the core and even with the cache as stock, I am not stable at 4.4 ghz. I think 4.3 is as fast as the cpu can go. Even with my the EVGA CLC 280 the temperatre are high. My case do not support 360 AIO


well I though that my 5820k at 4.4 ghz 1.3 Volt was bad.

thank for your help
Well 4.5 GHz is nice and all if you were able to get it stable, but realistically 4.3 isn't much slower than 4.5 GHz in real life workloads, it is only a 4.7% increase in frequency, so this is the maximum performance you can get out of it in the best case scenario.

On a positive note, you get around 20-25% increase in apps that are octa-core optimized and even a slight single-threaded bump.

Anyway, enjoy!

Desktop
(20 items)
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(10 items)
CPU
Intel Core i7-5960X @ 4.5GHz 1.216V/1.792VINPUT/LLC5
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Asus Rampage V Extreme/U3.1 @ BIOS 3801
GPU
Zotac RTX 2080 Ti AMP Edition
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Zotac RTX 2080 Ti AMP Edition
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WD BLACK 6TB 256MB CACHE (WD6003FZBX)
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WD GOLD 2TB 128MB CACHE (WD2005FBYZ)
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NZXT Kraken X62
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Operating System
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