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Can pass Realbench but fails Aida64

DemiSLayer
Level 7
Am running 6900k with Rampage V extreme on EKWB extreme 360 kit, 1000watt EVGA psu, Titan Xp SLI on air at moment. 32 gb 3200 mhz G-SKill 15cas memory,

On XMP and 3200mhz i can pass realbench all day how ever it will fail under a few min on aida64 even at stock cpu speed levels.

i can run 4.5ghz Oc with 3.7ghz cache and run realbench all day as well.

At 3000mhz I can pass both tests from stock to overclock.

At 4.5ghz i run CPU volts at 1.34 volts and 3.7ghz cache with cache volts set to 1.32 volts. at moment. I am going to fine tune the voltage later on but at moment i get sub 80 degrees full load.

Anyone know what i should adjust to get 3200mhz memory speeds?

I have replaced the motherboard, ram, CPU, etc.
i have tried higher voltages as well as load line etc etc. The system is solid with 3000mhz and the only voltage changes done to CPU and Cache.
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14 REPLIES 14

NemesisChild
Level 12
Is the memory two kits or one matched set?
Intel i9 10850K@ 5.3GHz
ASUS ROG Strix Z490-E
Corsair H115i Pro XT
G.Skill TridentZ@ 3600MHz CL14 2x16GB
EVGA RTX 3090 Ti FWT3 Ultra
OS: WD Black SN850 1TB NVMe M.2
Storage: WD Blue SN550 2TB NVMe M.2
EVGA SuperNova 1200 P2
ASUS ROG Strix Helios GX601

NemesisChild wrote:
Is the memory two kits or one matched set?




It is matched set. I have had it RMAd with attempt to resolve issue.

Silent_Scone
Super Moderator
You'll end up degrading that CPU with that much cache voltage. It would help if you specified what tests you're running concurrently in AIDA. The cache test routines are notoriously good at finding instability.
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

DemiSLayer
Level 7
what limit in volt for cache would you say is safe? i am running the system stability test in aida64 extreme minus hdd and gpu testing.

DemiSLayer wrote:
what limit in volt for cache would you say is safe? i am running the system stability test in aida64 extreme minus hdd and gpu testing.


Untick FPU, the AVX routines in AIDA's FPU test coupled with that much uncore voltage will end up degrading the CPU, keep the ceiling somewhere in between 1.15-1.2v.

Run the CPU test and cache tests independently to isolate the instability.
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

DemiSLayer
Level 7
Ill do that. thanks. Also running HCI design memory test will fail at 3200mhz no matter what CPU speed etc.

Silent_Scone
Super Moderator
Revert uncore to stock for the time being in that case and retest the memory, too.
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

DemiSLayer
Level 7
at stock it still will not pass stress test at 3200mhz

DemiSLayer wrote:
at stock it still will not pass stress test at 3200mhz


What stress tests are you ticking at this point? Just CPU? The issue is either with the CPU OC or the memory, however, given you're getting errors quickly in HCI the memory is more likely. Increase DRAM voltages to 1.4v and retest.

Again, make sure not to tick AIDA FPU test. It's also important that you keep uncore at stock at this point. This is the last bus you should overclock when dialing in, as it's the least benificial.
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090