R6E: Any clue on what is the expected i9-7940X overclock?

[Inkar]

Hi,

Does anyone have a clue about what is the all core expected i9-7940X (non-avx) overclock range with the Rampage VI Extreme and an AIO?.
I know nothing is guaranteed other than the factory specs. I just can't find any reviews with this kind of data for the 7940X.


Thanks.

[Marko911]

Hot Trout wrote:
Similar requirements here. For my motherboard I choose to put the OS and Apps onto an Optane 900p riser card (fastest storage around). That left me both the M.2 slots for dedicated Samsung 960 Pro drives. I can average somewhere around 2500MB/s between disks during repacking. I noticed that the i9 released some lost performance from within my 980ti but the real benefit was being able to multitask without any slow down.

Look...:D In my opinion this CPU specimen isn't overclokable after all. 😄 https://imgur.com/a/kzvZe

[Hot_Trout]

Marko911 wrote:
Point taken,I'm new to HEDT platform so I'm used to run prime on i7 7700k...Can you suggest me something to test stability on i9?I didn't have any issue with TPU II OC profile but,but temps on those settings are pretty much high for delid CPU...

I agree, realworld testing is more to the point. That said, running blender with something like the classroom scene for periods of a few hours will test the reliability of the CPU without boiling it. I also recommend running the Intel Processor Diagnostic Tool as this will properly test AVX calculations and cache. If you pass these then you can run anything. Prime is still a great stress tester but hammering all the cores will cook the CPU and this will never happen in Windows with 12 or 14 cores present so why test for it.

[Marko911]

Hot Trout wrote:
I agree, realworld testing is more to the point. That said, running blender with something like the classroom scene for periods of a few hours will test the reliability of the CPU without boiling it. I also recommend running the Intel Processor Diagnostic Tool as this will properly test AVX calculations and cache. If you pass these then you can run anything. Prime is still a great stress tester but hammering all the cores will cook the CPU and this will never happen in Windows with 12 or 14 cores present so why test for it.

Those tests my CPU passed with flying colors 😄 Max reported temp was 80,I think. 🙂

[CSN7]

Hot Trout wrote:
Well I have been for the past few weeks running 24/7 a mixture of large scale zip work consisting of over 42,000 files being opened, changed and repackaged from one SSD to another using all cores. This produces heavy loads on all cores, heavy memory use and constant I/O. This has been stable. The PC also runs blender for 6+ hours with 100% CPU without fail. I have not de-lidded but I did use liquid metal paste between the CPU and the HUGE dedicated EK CPU & VRM waterblock.

Can I just ask again what people with the 7940x are setting their VCCIO and CPU System Agent to?

Running a 7920X, but SA 0.880v should be about right. Didn't really need to raise it beyond that even at 4000Mhz and 15-15-15-35 1T.
IO on the other hand is very usefull to stabilize Mesh frequency. I think not everyone realizes that. Is set to 1.1v IO for everyday use @3200 Mesh.

But that's what's possible with a good combination of settings:

[Hot_Trout]

Just wanted to add that certain cores will heat up a lot more than others and that the only way to keep heat issues resolved is to back off on the cores that run hot and concentrate on the others that don't.

[Marko911]

Hot Trout wrote:
Just wanted to add that certain cores will heat up a lot more than others and that the only way to keep heat issues resolved is to back off on the cores that run hot and concentrate on the others that don't.

yeah,I thought I was the only one having one core heating up drastically than others ...:D Obviously I will have to do some granular fine tuning of my OCed CPU.

[Silent_Scone]

Who delidded that CPU? This is my non delidded 7940x running at 1.25v 4.7

[Marko911]

Silent Scone wrote:
Who delidded that CPU? This is my non delidded 7940x running at 1.25v 4.7

I have delided my CPU..You think I did something wrong? 😄 All my other cores have great temps except this one...
Damn boy,when I see your results can't help but wonder what kind of crap intel sells in my country :confused:

[Silent_Scone]

You could try relidding it to be certain, a core disparity that high isn't unheard off on these. Question is, was it that bad before you delidded?

[Marko911]

Silent Scone wrote:
You could try relidding it to be certain, a core disparity that high isn't unheard off on these. Question is, was it that bad before you delidded?

It was bad even before delidding.But not that much ,than again look at my liquid metal application,it was done as it should and IHS is tightly glued together with silicone with PCB .it isn't elevated at all. https://imgur.com/a/dmuNB