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7920x OC numbers all over the place

post #1 of 34
Thread Starter 
Hiya, I've dabbled with overclocking in the past but this new CPU is off the hook. I don't trust the HWMonitor core readings, the current temp jumps around fluctuating as much as 20 degrees. I thought I had everything stable but it just crashed after 20 minutes of Prime95 so it's back to the drawing board.

Here's some Passmark numbers, the first batch is out of the box 2.9 and 2133 RAM, voltage set to auto, Performance dropped with the overclock except for memory which bumped up appropriately.

2.9 GHZ, 2133 RAM, Passmark 6992.7 CPU, 20729.2, 2D 968.1, 3D 15290.6, MM 2704.5, DM 18681.9
4.3 GHZ, 4000 RAM, Passmark 6857.7 CPU, 18871.3, 2D 969.4, 3D 15578.2, MM 3140.1, DM 9324.2
4.5 GHZ, 4000 RAM, Passmark 6890.2 CPU, 15998.9, 2D 1002, 3D 15301, MM 3178, DM 121.95

Cinebench

Cinebench 15 2.9 GHZ, 2133 RAM, open GL 164.41 FPS, CPU 2528cb
Cinebench 15 4.5 GHZ, 4000 RAM, open GL 183.60 FPS, CPU 1448cb

Geekbench 4,

Open CL 2.9GHZ 210475, 4.3ghz 213393, 4.5ghz 213837.



Question is what the hell am I doing wrong? Any chance these bench marking tools aren't reading the CPU right because it's too new or something? The build is down below, It's not going into the Lian Li until it's stable, right now it's in an air 740.

CPU

Intel - Core i9-7920X 2.9GHz 12-Core Processor
$1079.99
CPU Cooler

EVGA - CLC 280 113.5 CFM Liquid CPU Cooler
$115.80
Motherboard X299M GAMI​NG PRO CAR​BON AC $299.99
Memory

G.Skill - Trident Z 16GB (2 x 8GB) DDR4-4133 Memory
$215.75

G.Skill - Trident Z 16GB (2 x 8GB) DDR4-4133 Memory
$215.75
Storage

Samsung - 960 PRO 512GB M.2-2280 Solid State Drive
$289.00
Video Card

Zotac - GeForce GTX 1080 Ti 11GB Mini Video Card (2-Way SLI)
$729.99

Zotac - GeForce GTX 1080 Ti 11GB Mini Video Card (2-Way SLI)
$729.99
Case

Lian-Li - PC-TU100B Mini ITX Tower Case
$79.99
Power Supply

Silverstone - SFX 800W 80+ Titanium Certified Fully-Modular SFX Power Supply
$179.99
Operating System

Microsoft - Windows 10 Pro OEM 64-bit
Edited by ccosborne3 - 9/21/17 at 3:27pm
post #2 of 34
Thread Starter 
Sorry, have to edit the numbers, what I Posted is unreadable.
post #3 of 34
Probably the CPU power limit and current protection needs to be turned up.

See if this helps... http://www.overclock.net/t/1634045/skylake-x-phantom-throttling

Watch your temps when you unleash that thing.
X299 Evolv'd
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CPUMotherboardGraphicsRAM
i7-7820x @ 4.8GHz Gigabyte Aorus X299 Gaming 7 EVGA 1080 ti FTW3 g.skill TridentZ RGB 3600 CL16 
Hard DriveHard DriveCoolingOS
2 x Samsung 960 EVO 500gb Raid 0 Samsung 850 EVO 1TB H115i w 4 x Noiseblocker B14 PS Push/Pull Windows 10 Pro 
MonitorKeyboardPowerCase
AOC Agon AG352UCG 3440x1440 100hz Ultra Wide Corsair K70 EVGA Supernova G2 850w Phanteks Evolv ATX Tempered Glass 
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X299 Evolv'd
(13 items)
 
unRAID Server
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CPUMotherboardGraphicsRAM
i7-7820x @ 4.8GHz Gigabyte Aorus X299 Gaming 7 EVGA 1080 ti FTW3 g.skill TridentZ RGB 3600 CL16 
Hard DriveHard DriveCoolingOS
2 x Samsung 960 EVO 500gb Raid 0 Samsung 850 EVO 1TB H115i w 4 x Noiseblocker B14 PS Push/Pull Windows 10 Pro 
MonitorKeyboardPowerCase
AOC Agon AG352UCG 3440x1440 100hz Ultra Wide Corsair K70 EVGA Supernova G2 850w Phanteks Evolv ATX Tempered Glass 
Mouse
Logitech G900 
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post #4 of 34
Thread Starter 
Thanks for the thread referral, I had never even heard of the Intel tuning utility. it looks like great software, I wasn't able to overclock from it, kept crashing but I'll watch some Youtube videos to get the hang of it. It's definitely some kind of throttling.

I ran the passmark software a few more times to see how far I could get before the throttling started. Anything above 4.2 goes loopy but it's pretty much predictable until then. Pre-purchase I was hoping for 4.5 without delidding, it still might get there with tweaking but I think I'm going to send it out for delidding quicker than I thought. It seems like an inevitability.
post #5 of 34
Quote:
Originally Posted by ccosborne3 View Post

Thanks for the thread referral, I had never even heard of the Intel tuning utility. it looks like great software, I wasn't able to overclock from it, kept crashing but I'll watch some Youtube videos to get the hang of it. It's definitely some kind of throttling.

I ran the passmark software a few more times to see how far I could get before the throttling started. Anything above 4.2 goes loopy but it's pretty much predictable until then. Pre-purchase I was hoping for 4.5 without delidding, it still might get there with tweaking but I think I'm going to send it out for delidding quicker than I thought. It seems like an inevitability.

Hopefully another x299 owner will hop in here and tell you how to eliminate the throttling via Bios settings. I am not a big fan of the Intel Tuning Utility.
X299 Evolv'd
(13 items)
 
unRAID Server
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CPUMotherboardGraphicsRAM
i7-7820x @ 4.8GHz Gigabyte Aorus X299 Gaming 7 EVGA 1080 ti FTW3 g.skill TridentZ RGB 3600 CL16 
Hard DriveHard DriveCoolingOS
2 x Samsung 960 EVO 500gb Raid 0 Samsung 850 EVO 1TB H115i w 4 x Noiseblocker B14 PS Push/Pull Windows 10 Pro 
MonitorKeyboardPowerCase
AOC Agon AG352UCG 3440x1440 100hz Ultra Wide Corsair K70 EVGA Supernova G2 850w Phanteks Evolv ATX Tempered Glass 
Mouse
Logitech G900 
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X299 Evolv'd
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CPUMotherboardGraphicsRAM
i7-7820x @ 4.8GHz Gigabyte Aorus X299 Gaming 7 EVGA 1080 ti FTW3 g.skill TridentZ RGB 3600 CL16 
Hard DriveHard DriveCoolingOS
2 x Samsung 960 EVO 500gb Raid 0 Samsung 850 EVO 1TB H115i w 4 x Noiseblocker B14 PS Push/Pull Windows 10 Pro 
MonitorKeyboardPowerCase
AOC Agon AG352UCG 3440x1440 100hz Ultra Wide Corsair K70 EVGA Supernova G2 850w Phanteks Evolv ATX Tempered Glass 
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post #6 of 34
Thread Starter 
They've probably already left enough bread crumbs to get out of the woods, on page 2 of the thread there's some suggestions on what to do for a MSI motherboard, I just have to research it more to figure out what the hell they're talking about. No hurry, I'll get there.thumb.gif
post #7 of 34
Thread Starter 
I've got this thing on the run now. I took the voltage thingy off auto and put the Vcore at 1.29 and the vccin to 2.10 and it's really cooking.

4.7 ghz wasn't stable but I got a couple of benchmarks before it crashed. The Passmark CPU score was 23852 and cinebench 15 hit cb 3103 and open GL was 196.85. Those numbers are better than the (not overclocked) threadripper 1950x numbers achieved by Mr, Hilbert Hagedoorn.

4.7 isn't stable though, geekbench crashed and the intel utility benchmark wouldn't even start, highest recorded temp was 94 degrees,

I dropped it to 4.6 and it's been stable running Prime95 blend for the past 45 minutes Ran Cinebench again and the numbers were close, 196.17 open GL and 3038 CB. I didn't want to run the ones that crashed until it passes an all night stress test at 4.6. At some point in it's run it hit 90 degrees but for the most part it seems to be hanging in the high 70's.

I'm pretty happy with the new numbers, a little tinkering and some new fans doing push pull on the EVGA CLC 280 (maybe the industrial 3000 speed Noctuas) and 4.7 should be attainable. Might not have to delid after all.
post #8 of 34
Have you found a stable set up yet? Seems like your getting some pretty good thermals compared to the 7900x, I've been debating on which one to get. I have pretty much the same set up as you just no cpu.
post #9 of 34
That seems like a pretty weak cooler for that CPU. You might look at that as the source of your problem. Also check out VRM temps. They might be getting hot if they aren't getting some air blowing over it's heatsink. (that said, they can get pretty hot till there would be an issue.)
Edited by Zurv - 9/23/17 at 8:12am
post #10 of 34
Thread Starter 
Quote:
Originally Posted by tim613 View Post

Have you found a stable set up yet? Seems like your getting some pretty good thermals compared to the 7900x, I've been debating on which one to get. I have pretty much the same set up as you just no cpu.

It's stable at 4.6, I ran Prime95 blend for 10 hours and the pc had no problems handling it. 2 benchmark programs Geekbench & the Intel utility refuse to be run at 4.6. I ran it on Novabench and it scored 3887 #6 on the list, not bad.

I think it might be a really, really good chip though. Silicon Lottery released their 7920x price list and they have them running from 4.4 through 4.7 WITH the delid. This one seems to be able to reach those speeds without it. I'm going to apply their AVX offset & AVX512 offset settings and see what happens, could be with those settings I'll be able to reach 4.7 or higher. It hasn't been throttling because of the heat, it's some kind of voltage thing, I think anyways.

The 7900x goes toe to toe with the TR 1920, the 7920x can trade blows with TR 1950, it doesn't beat TR multicore but it certainly competes. It does beat it single threaded and an argument can be made it's a superior chip if you look at the totality of performance, 7900x just gets beat. I paid $1079 for it, TR is $999. I'd take the 7920x every time, no regrets.

Nothing against Threadripper, without those magnificent bastards at AMD the 7900x would be priced at $1600 the $7920x would be the 2k chip.and the coming ass-kicker chips wouldn't exist at all.
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