AMD FX-8150 Bulldozer Overclocking On Ubuntu Linux
Phoronix: AMD FX-8150 Bulldozer Overclocking On Ubuntu Linux
While in the weeks since the launch of the AMD FX "Bulldozer" processors we have looked at many areas of computing performance for the FX-8150 CPU, from the compiler tuning to multi-core scaling, one area that hasn't yet been covered under Linux is the AMD FX-8150 overclocking. But this article changes that.
Cool&Quiet + TurboCore + overclocking
A decent amount of performance boost can be achieved with the stock air cooler, while keeping power usage low.
By slightly raising the "FSB" clock (215MHz), and raising *a lot* the TurboCore multiplier (>4.6GHz) you'll see that the system is perfectly stable.
But raising the main CPU multiplier is relatively harder !
I've spent little time playing with the BIOS, so my granularity is high, but AFAICT I can't go past 4.1GHz with a *completely* stable system.
The "pts/cpu" benchmark suite ran in a loop and I thought the system was stable, then I compiled a kernel (--jobs=10), which yielded issues.
Did it again, got a lot of invalid instructions, segfaults, oopses, depending on whether the CPU decides to crash in user or kernel space...
The reported CPU temperature was less than 70°C, be it for the CPU sensor or the mainboard socket sensor (which conditions the fan speed).