Odd behaviour with new Broadwell-E

Jintel

Jintel

Jintel

Associate
Joined
5 Nov 2016
Posts
16
Hi All,

Treated myself to a new CPU (6900k) recently, only I wish I hadn't. I had a 6850k that was rock solid @4.3Ghz but now I keep getting jittery game place, benchmarks vary etc.

I've noticed that HWMonitor keeps recording my min clock speed as low as 800Mhz. For the sake of clarity I have sync'd all my cores to (32, then 40, and 43), set all my voltages, Windows power is set to High performance. That doesn't seem right does it? My clock should be fairly stable with the exception on the AVX offset of 3 or 4.

I am my wits end!

Thanks,
J
 
Yep definately sound like a stability issue. Probably need to provide it with some extra volts or dial down the clocks. Have you tried runnings some stability test like prime?
 
It does that at stock speeds and m/board defaults too. Not just an oc problem. :|

I've only run RealBench on it and at stock it won't run for an hour without crashing out the program. It has a H115i on it and temps don't rise above 65.

RMA?
 
Yes, I have been doing all the tests with XMP enabled but I have dropped the mem speed down from 3200 to 2400 with no better stability. :(

Running an AX1200i. It's not pulling more than 850w during bench tests.
 
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Have you tried to put you 6850k back in to rule out anything else. If all is fine one you put your old cpu back in you might just have a bad cpu.
 
Yeah, it's fine with the old one. I don't know why I posted here....you are all now thinking he just answered his own question right?! :D

I'm not a muppet for raising an RMA...it's def not right.
 
Jintel said:
Treated myself to a new CPU (6900k) recently, only I wish I hadn't. I had a 6850k that was rock solid @4.3Ghz but now I keep getting jittery game place, benchmarks vary etc.

I've noticed that HWMonitor keeps recording my min clock speed as low as 800Mhz. For the sake of clarity I have sync'd all my cores to (32, then 40, and 43), set all my voltages, Windows power is set to High performance. That doesn't seem right does it? My clock should be fairly stable with the exception on the AVX offset of 3 or 4.
Click to expand...

Have you tried deleting the HWMonitor config file? It may have changed but HWM (and Coretemp) don't automatically update their CPU configs when you change CPU (this leads to erroneous TJmax data in CT and other irregularities in HWM).
 
Have you got the latest bios for your motherboard? Manufacturers are releasing updated bios versions all the time, many of which are stability fixes.
 
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