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post #9701 of 9748 (permalink) Old 03-14-2019, 10:24 AM
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So, tried the 4.9 and increased the vcore up to 1.3v gradually
Still bsod after 1h+ in blend, prime95 26.6 (since I kept the same 4.7 / -2 avx offset)
Increasing the vcore over 1.3 won't make me feel comfortable, nor the cpu package temps that will probably get easily up to 80C+ (under sustained stress test).
I don't know, maybe increasing the vccio (still low) may help?

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post #9702 of 9748 (permalink) Old 03-14-2019, 10:29 AM
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Hi,
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I would need for 4.9 at least avx-4

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post #9703 of 9748 (permalink) Old 03-14-2019, 10:54 AM
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Quote: Originally Posted by kingofblog View Post
Obviously if your dT is already very low, then increasing flow rate does nothing. For your example, a jet turbine can not cool a reactor through a 120 mm radiator, but it would certainly cool the radiator itself down to ambient.



(1) I only need 3000 rpm fans to run benchmarks. My existing (bad) airflow setup can already run my daily workloads.
(2) This is an actual problem. I need high-flow exhaust fans too, and then the total cost of all the fans is approaching $200.
(3) Do higher fan speeds imply faster dust accumulation?

I understand that more radiators can deliver the same cooling at lower fan RPM, but the upfront cost of a new loop is high. Buying fans is also expensive, but a new loop would also need new fans, so the cost is additive. To be honest, the way I am leaning right now is to just let the CPU thermal throttle instead of spending any more money.
(3) If you think about it higher fan speeds = more air @ higher pressure and speed coming in attracting more dust or at a faster rate. Proper balance of case pressure is what keeps dust out of your case but your intake filters must be good and regularly cleaned.

Regarding spending more or not for the sake of benchmarking, well it's up to you really.

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post #9704 of 9748 (permalink) Old 03-14-2019, 02:50 PM
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Hi guys some time ago I posted about occasional stutters in game with my Skylake-X system compared to my 9900k, same GPU (RTX 2080 Ti).

Well I returned my CPU and took a new one and the problem has gone away, got a nice overclocker too.

Undelidded ATM on custom loop 4,8GHz full stable 1.19v - 7960x.

Looking forward to delid, or do you guys advise against?

Thanks.
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post #9705 of 9748 (permalink) Old 03-14-2019, 04:01 PM
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Hi,
Delid or not usually depends on if temps are okay or not
Also if a three year Intel warranty is something one wants to flush down the crapper or not

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post #9706 of 9748 (permalink) Old 03-14-2019, 06:56 PM
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Quote: Originally Posted by kingofblog View Post
Obviously if your dT is already very low, then increasing flow rate does nothing. For your example, a jet turbine can not cool a reactor through a 120 mm radiator, but it would certainly cool the radiator itself down to ambient.



(1) I only need 3000 rpm fans to run benchmarks. My existing (bad) airflow setup can already run my daily workloads.
(2) This is an actual problem. I need high-flow exhaust fans too, and then the total cost of all the fans is approaching $200.
(3) Do higher fan speeds imply faster dust accumulation?

I understand that more radiators can deliver the same cooling at lower fan RPM, but the upfront cost of a new loop is high. Buying fans is also expensive, but a new loop would also need new fans, so the cost is additive. To be honest, the way I am leaning right now is to just let the CPU thermal throttle instead of spending any more money.
I have 8 of the 3000 RPM fans, no dust filters, but surprisingly very little dust accumulation. Pretty much just had to dust the GPU backplates after a year. Probably because the fans run at 800 rpm 99% of the time. My old air cooled rig, with dust filters, used to get packed full of it!

I also only use mine at 3000 RPM for benchmarks. Wouldn't want them at that speed for anything else, lol.

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post #9707 of 9748 (permalink) Old 03-14-2019, 07:40 PM
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Hi,
Real dust filtering is easy to concoct
I had some old speaker filter material and used it for my front and top intakes after making some frames to wrap it around
A lot better than the normal screen case manufactures use

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post #9708 of 9748 (permalink) Old 03-15-2019, 01:36 PM
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Quote: Originally Posted by ThrashZone View Post
Hi,
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I would need for 4.9 at least avx-4
OK but why since it is stable with avx -1 at 4.8 (4.7) and it worked even at avx 0, same 4.8 (kept for a while earlier).
And the bsod was within prime95 26.6, without any avx support.

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post #9709 of 9748 (permalink) Old 03-15-2019, 01:50 PM
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Quote: Originally Posted by kingofblog View Post
Despite the release notes, if CineBench R20 is using AVX, Maxon sure is hiding it well. I just ran a 5 GHz run on my i9-7900X and did not see any offset activating, and I would know, since my offset is -10.

Performance:
4.5 GHz core + 3.0 GHz uncore = 5917
4.8 GHz core + 3.2 GHz uncore = 6297
5.0 GHz core + 3.2 GHz uncore = 6555

R20 uses a lot more power than R15 though. It actually produces a higher temperature than Prime95 here, despite lower overall power. I saw thermal throttling at my custom Tjmax (85 C) once my liquid temperature reached 27 C, which is harsher than Prime95. To get the 6555 score, I had to wait about half an hour for my liquid temperature to settle at 20 C.

EDIT: I disassembled Cinebench.exe and found it only uses 128-bit AVX instructions. However, it does execute FMAs, which explains why the thermal density is worse than Prime95 26.6 (128-bit non-FMA).

The top function in R20 (embree.dll):
Code:
vmovups xmm0, xmmword ptr [r11+rsi*1+0x20]
vmovups xmm2, xmmword ptr [rdx+rsi*1+0x20]
vmovups xmm3, xmmword ptr [rax+rsi*1+0x20]
vmovups xmm4, xmmword ptr [r15+rsi*1+0x20]
vmovups xmm5, xmmword ptr [r14+rsi*1+0x20]
vmovups xmm5, xmmword ptr [r13+rsi*1+0x20]
vfmsub213ps xmm0, xmm13, xmm9
vfmsub213ps xmm2, xmm12, xmm10
vfmsub213ps xmm3, xmm8, xmm11
vfmsub213ps xmm4, xmm13, xmm9
vfmsub213ps xmm5, xmm12, xmm10
vfmsub213ps xmm1, xmm8, xmm11
vpmaxsd xmm0, xmm0, xmm2
vpmaxsd xmm3, xmm3, xmm7
vpminsd xmm4, xmm4, xmm5
vpminsd xmm5, xmm1, xmm6
vpmaxsd xmm0, xmm0, xmm3
vpminsd xmm0, xmm0, xmm3
vpcmpgtd xmm0, xmm0, xmm3
vmovmskps edi, xmm0
xor rdi, 0xf
jz -112
Outside of Embree, the Cinema4D code itself only executes scalar instructions.

Edit2: Turns out my cooling problems were because I had no exhaust fans. After adding 700 rpm exhaust (X299 DARK doesn't support fan curves for case fans, ***!), I can consistently complete one run of R20 without throttling.
Are there any stand-alone mirrors of the R20 left? I missed the boat before everything went to hell.

If there are, I can run it through VTune this weekend. That'll give a breakdown of what R20 is actually using and how much of each.
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post #9710 of 9748 (permalink) Old 03-15-2019, 01:54 PM
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Hi,
Not sure buddy it's just how I have to accommodate avx for my system :/

Leak testing now on my budget tuf mark 2 board got this morning still got 200.us left over from the credit on the prime deluxe return

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Optical Drive
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evga 1200P2
Cooling
2-280GTX Black Ice Nemesis rads with D5 pump-res combo and D5 top before and after rads.
Case
corsair 450D with added 2nd floor to house radiator on top
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ASUS VG248QE 24" 144Hz
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redragon
CPU
i7-5930k with evo and koolance vrm water blocks
Motherboard
X99 Sabertooth
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EVGA 1080ti FTW3 with Water block
RAM
Trident-Z 3200C14 4x8gb's
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Power Supply
EVGA 1000w P2
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Case
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Operating System
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