7900X - Stability Benchmarks

RSR

RSR

RSR

Soldato
Joined
17 Aug 2006
Posts
9,872
Hi,

I've been playing around with the O/C on my new setup which on the whole seems to be going well. However, when use a x47 multiplier (or more and cooling seems manageable) on the MB and then run Intel XTU benchmark the system powers off and reboots. Some times its straight away or sometime its after 10/15 seconds or so. Most other benchmarks / stability tools seems to run fine so I've been trying to isolate the cause of the reboots.

I'm guessing its ether thermals or its something to do with the cache?

Here is what I have tried already:

I've changed the following settings as I thought I was bumping into power limits:

BIOS Settings:

CPU SVID Support [Disabled]
CPU Current Capability [140%]
Long Duration Package Power Limit [4095]
Short Duration Package Power Limit [4095]

So next I thought it would be a LLC based problem, so I have changed that to LLC6 which seems a little more stable but the difference isnt much between Auto and LLC6.

I've also set the following volts from Auto to manual on the MB:

vCore: 1.200 to 1.250
Cache CPU Cache Voltage Offset [0.050]
VICCN: 1.9

Running the Mesh at the follow:

Min. CPU Cache Ratio [24]
Max. CPU Cache Ratio [24]

It some times plays ball but its been hit and miss.

My other system specs are:

CPU: i9-7900X
MB: Asus Rampage VI Extreme
RAM: G.Skill Trident Z RGB 3600 C16
PSU: Seasonic Prime Platinium 1200W

Any pointers would be greatly appreciated

Thanks
 
Last edited:
I think I've cracked it.

Looks like it was the AVX/AVX 512 offsets, I assume these draw crazy amount of power which the board can't supply hence the reboot.
 
Harpss1ngh said:
What settings are you running at the moment? I'll hopefully receive the exact setup you got here so would like to have a play :). I'll have a learning curve as the last CPU I overclocked was my X5690 and there's been a few changes since then!
Click to expand...

I'm currently running the following settings as they have been working well, I'm just running the RAM at the XMP profile speeds for the moment as i've not had time to sit down and properly tune it to where its stable.

I've changed the following settings in the BIOS/UEFI but your settings may vary.

Ai Overclock Tuner [XMP]
XMP [XMP DDR4-3603 16-16-16-36-1.350V]
CPU Strap [100]
BCLK Frequency [100.0000]
AVX Instruction Core Ratio Negative Offset [3]
AVX-512 Instruction Core Ratio Negative Offset [5]
CPU Core Ratio [Sync All Cores]
ALL-Core Ratio Limit [47]
Min. CPU Cache Ratio [32]
Max. CPU Cache Ratio [32]
DRAM Frequency [DDR4-3600MHz]
CPU SVID Support [Disabled]
CPU Core Voltage [Manual Mode]
CPU Core Voltage Override [1.178]
DRAM Voltage(CHA, CHB) [1.3500]
DRAM Voltage(CHC, CHD) [1.3500]
CPU Load-line Calibration [Level 6]
CPU Current Capability [140%]
Long Duration Package Power Limit [4095]
Short Duration Package Power Limit [4095]

I'd recommend running the 0802 or 1002 BIOS on these boards at the moment. There is a 1003 available but i'd give it a little while yet. I know the CPU will push 5Ghz with ease but when I have time ill create a few profiles for it one for benching and the other for daily use.
 
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