I have a desktop running archlinux mostly used for playing around with 3D stuff, so i decided to boost the cpu a little after installing a hyper 212 heatsink.
I have an amd fx 8320 clocked at 3.5Ghz, i just boosted it to 4.0GHz via the bios. The speed increase is notable.
However, the multiplier set in the bios is 4000Mhz
~ $ lscpu
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
On-line CPU(s) list: 0-7
Thread(s) per core: 2
Core(s) per socket: 4
Vendor ID: AuthenticAMD
CPU family: 21
Model name: AMD FX(tm)-8320 Eight-Core Processor
CPU MHz: 1400.000
CPU max MHz: 4000.0000
CPU min MHz: 1400.0000
L1d cache: 16K
L1i cache: 64K
L2 cache: 2048K
L3 cache: 8192K
Noting the "CPU max MHz" states the correct frequency as set in the bios.
When i was stressing the cpu, to see if my temperatures were stable. I used systester
, which oddly shows as 4320MHz ??? Screenshot: http://imgur.com/JbutGb4
If i set the processor to use the performance governonr with cpupower
, lscpu and /proc/cpuinfo show it running as 4000MHz.
I also noticed, after installing a small windows 7 partition to this machine, that some Windows tools show the processor is clocked at 4320Mhz also.
What's with the fluctutation? Bios is set to 4000MHz, some programs in both windows/linux show the cpu to be clocked at 4320MHz.
Wondering why this is. Thanks.