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post #19751 of 22341
Quote:
Originally Posted by cephelix View Post

Quote:
Originally Posted by tolis626 View Post

I've heard quite a lot of people recommending 27.9, but I haven't gotten around to trying it. Maybe I will, although I doubt my chip will fare any better. Temps do rise and most of the time I can't do anything about it. It needs delidding, but I'm chickening out of it all the time. tongue.gif
Version 26.6 and 27.9 are so much cooler than the more recent versions . Give it a try and if you're still unsatisfied with temps then you can seriously consider delidding. With the easy delidding tool now it should be fool-proof but the vice only method is still as easy

Well, using der8auer's Delid Die Mate (I suppose that's the tool you mean) is fool proof, but it also costs like 100€. Seriously, what the hell? If that thing was 50€ it would be selling like hotcakes. The vice method is easy, but I get really clumsy when anxious and that's what scares me most. Plus, I have to get a vice. Damn... First world problems right there. biggrin.gif
post #19752 of 22341
Quote:
Originally Posted by cephelix View Post

Version 26.6 and 27.9 are so much cooler than the more recent versions . Give it a try and if you're still unsatisfied with temps then you can seriously consider delidding. With the easy delidding tool now it should be fool-proof but the vice only method is still as easy

Yeah, Man! I've been using P95 26.6, 27.7 & 27.9, instead of anything higher in order...

The P95 28.'s create too much heat, for my 4790K.

I don't want to, unnecessarily, burn that baby out!
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post #19753 of 22341
So no one has an idea what that voltage is yet? I forgot the users name but he was helping me out wiyh using HWInfo, he has yo check an MSI Rep to get the exact use for it.*i havent followed up on that however*

25 runs of x264 enough or should i change methods?
I suppose i can say my 1.315 VID is stable so far, now to wotk on cache ratio.

One thing to add to this is lowering VCCIN gave me a few FPS in X264 from 4.20 ish yo 4.27-4.28...am I gaining performance lowering it?? Have i been running too much from the beginning at 1.90 VCCIN?
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post #19754 of 22341
Quote:
Originally Posted by JourneymanMike View Post

Yeah, Man! I've been using P95 26.6, 27.7 & 27.9, instead of anything higher in order...

The P95 28.'s create too much heat, for my 4790K.

I don't want to, unnecessarily, burn that baby out!
Yeah, I still have a few years on this current build. I did try v28 small fft when I first got my 4790K together..Temps shot up to 95C within minutes...Shut it down and never touched that particular p95 version again. lol
Quote:
Originally Posted by v1ral View Post

So no one has an idea what that voltage is yet? I forgot the users name but he was helping me out wiyh using HWInfo, he has yo check an MSI Rep to get the exact use for it.*i havent followed up on that however*

25 runs of x264 enough or should i change methods?
I suppose i can say my 1.315 VID is stable so far, now to wotk on cache ratio.

One thing to add to this is lowering VCCIN gave me a few FPS in X264 from 4.20 ish yo 4.27-4.28...am I gaining performance lowering it?? Have i been running too much from the beginning at 1.90 VCCIN?
For me personally, I do 50 runs, 16 threads, normal priority of x264. Never had a bsod after that. I just let it run overnight. 1.9vccin is fine, still within specs
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post #19755 of 22341
Quote:
Originally Posted by tolis626 View Post

So I've been using OCCT and Prime95 for stability testing these past few days, and it seems they aren't really any better at finding instabilities than RealBench or x264, but they do it faster.

OCCT always confuses me. So many options. Am I supposed to use OCCT test (really cool) or linpack test? AVX? How do you enable error checking and where are errors reported?

I've used OCCT with its gpu stress and error checker. That seems solid, albeit as you say extremely hard to pass.
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post #19756 of 22341
prime 95 v28.7 vs. v27.9

Seeing as ppl are saying 28.7 is too hot and 27.9 is cooler I decided to run a comparison. I ran both for 10 minutes using FFT size 1344/1344 with 13 GB of memory, all other settings at default and ambient temps the same. Here are the results.

Clearly the latest version, 28.7 is cooler and it is clear why. The older 27.9 draws up to 10W more peak power.

28.7:

Max temp = 78c, max average temp = 73.8c , max package power = 121,64 W, average package power = 118.586 W

27.9:

Max temp = 85c, max average temp = 75.5, max package power = 131.483, average package power = 119.961

28.7



27.9

post #19757 of 22341
Yeah I've been using 28.7 for a while. Apparently I was using it without realizing it on my g3258 and only doing 1344-1344. It was hot but after delid no problems there even at the motherboard's maximum voltage (lol). But once I realized I was using 28.7 then I swapped down and it was barely different.

However, if you use blend then there might be a big difference.

Lately I've been using the actual prime search function. It gets a search set from the server and then spends like 10 days (lol again) searching. Apparently it defaults to "playing a noise" if a Mersenne prime is found (there are 49 known Mersenne primes). No noises yet. I've been using this to test my uncore (more on this later), as p95 seems like the best test for that. To that end I have it on my 4690k at 4.5@1.23V while varying the uncore. While x264 usually hovers around 57C on this setting (my temps are godlike after delidding - highly recommended), p95 *usually* hovers around 64C. But it can occasionally still get much hotter, definitely into the mid 70s and possibly up toward 80C which is where I have overheat shutdown set. Carried to a higher level of overclock or with weaker cooling this would definitely be thermally problematic. I'm approaching the end of my uncore tests and my p95 workload is 25% complete.

Now for a perfect transition into uncore, which I've been testing with this setting and using p95.

pubchart?oid=312211089&format=image

This is the chart I have so far. Just like core (that chart is many pages back), the voltage requirement is linear at low voltages, and becomes quadratic at higher ones.

There's a few interesting points though. The main thing seems to be a very close tie between uncore voltage and input voltage needed. I haven't narrowed this down yet, just as I haven't stabilized 45x despite a ton of settings. All tests were done with 1.23V core (about .015V more than needed for my normal 45x overclock) and 1.95V input voltage (a full 0.2V more than needed for my normal 45x). The above graph would indicate about 1.33V is needed, so I started at 1.30V and worked my way up. But as I did so I found wildly varying results, where one voltage would crash after 200 minutes while .01V more would crash after just 4 minutes. Pretty consistent with lack of input voltage.

I've upped input voltage to 2.1V (higher than I use even for my 47x profile) and I'm working my way back up again at 45x uncore. Still doubt I'm going to complete this p95 workload though before finishing with it. And I definitely can't use p95 to help stabilize 47x or 48x, so I'll have to decide whether to run it for another 5 days (...120 hours) to finish it or not.

However the real takeaway here is to keep low uncore voltage. If higher uncore voltage really does make input voltage harder or stress the FIVR more, then the 1.05V/40x setting is pretty ideal.
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post #19758 of 22341
I'm going to be building another build (ITX) this year and was wondering if I should get another 4790k or go with Skylake?

How many years from now should the 4790k be good for?
post #19759 of 22341
Quote:
Originally Posted by CoreyL4 View Post

I'm going to be building another build (ITX) this year and was wondering if I should get another 4790k or go with Skylake?

How many years from now should the 4790k be good for?

Do you think you can still find a good Z97 motherboard? They are scarce. And if you do get one and it fails a little down the road ...

.
post #19760 of 22341
I say go for it smile.gif.

I just built my Z97 after Christmas after having a 1090T for about 5 years.

Plenty of Z97 boards here smile.gif.
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