Soldato
Got a rev 3.0 version of the board with the UEFI bios and am having trouble with it maintaining a constant core clock and voltage with an FX8320. (whilst under 100% load on all cores)
It seems the options C1/C6 & turbo mode need to be set to off and HPC mode needs to be on in order to maintain a constant voltage and clock speed. The problem is that once these options are set the computer doesn't post properly. At post it cuts out (like the power is pulled) and then a second or so later it comes back on and posts as normal. This occurs on a cold boot, a restart after exiting the bios, a hard reset and a normal restart from windows. (I have had it cut out a second time before kicking it properly)
Here are the specs for the machine:
Gigabyte 990fxa-ud5 rev 3.0 with bios FB. (wasn't inclined to put the beta FCb on)
AMD FX-8320
AMD Radeon HD 6850
Antec Truepower new 650
Noctua NH-L12 with both fans fitted
Temperatures in linpack when the bios is set so that it runs properly are as follows:
TMPIN0: 38
TMPIN1: 64
TMPIN2: 68
The system is set to run at 200x21 to give 4.2GHz and the voltage is set at 1.35V.
TL-DR: HPC on, C1/C6 & Turbo off (needed to stabilise voltage/frequency), pc consistently cuts out at post then comes back on and boots normally a second or two later.
It seems the options C1/C6 & turbo mode need to be set to off and HPC mode needs to be on in order to maintain a constant voltage and clock speed. The problem is that once these options are set the computer doesn't post properly. At post it cuts out (like the power is pulled) and then a second or so later it comes back on and posts as normal. This occurs on a cold boot, a restart after exiting the bios, a hard reset and a normal restart from windows. (I have had it cut out a second time before kicking it properly)
Here are the specs for the machine:
Gigabyte 990fxa-ud5 rev 3.0 with bios FB. (wasn't inclined to put the beta FCb on)
AMD FX-8320
AMD Radeon HD 6850
Antec Truepower new 650
Noctua NH-L12 with both fans fitted
Temperatures in linpack when the bios is set so that it runs properly are as follows:
TMPIN0: 38
TMPIN1: 64
TMPIN2: 68
The system is set to run at 200x21 to give 4.2GHz and the voltage is set at 1.35V.
TL-DR: HPC on, C1/C6 & Turbo off (needed to stabilise voltage/frequency), pc consistently cuts out at post then comes back on and boots normally a second or two later.