Hello,
I recenly bought a R9 380, i tried it on a old lag 775 motherboard with a core 2 duo e8500 and a 600w psu with 20a on the 12v rail, but the card acts strangely, rarely ever i can see it reaches past 100w consumption, and gpu z and sapphire trixx record its usage, voltage and amperage going up and down continously during gaming. I tried a stress test with stock clock and the pc completely shuts down every time. I lowered the clocks to 700 and 1100 on shader clock and memory clock respectively and in this way i managed to have a stress test but still after a minut of stable amperge and voltage it starts going up and down fron 10-20 to 100 watts and ampers each. My father used a tool to measure the voltages on the 12v rail and he saw that under the stress test(with lower clocks, 700 and 1100) the voltage went down to 11.40
This means the PSU is not good enough for the task right? Maybe the motherboard and the cpu are also bottlenecking? I saw the both cores on 95-100% usage during gaming.
thanks in advance
I recenly bought a R9 380, i tried it on a old lag 775 motherboard with a core 2 duo e8500 and a 600w psu with 20a on the 12v rail, but the card acts strangely, rarely ever i can see it reaches past 100w consumption, and gpu z and sapphire trixx record its usage, voltage and amperage going up and down continously during gaming. I tried a stress test with stock clock and the pc completely shuts down every time. I lowered the clocks to 700 and 1100 on shader clock and memory clock respectively and in this way i managed to have a stress test but still after a minut of stable amperge and voltage it starts going up and down fron 10-20 to 100 watts and ampers each. My father used a tool to measure the voltages on the 12v rail and he saw that under the stress test(with lower clocks, 700 and 1100) the voltage went down to 11.40
This means the PSU is not good enough for the task right? Maybe the motherboard and the cpu are also bottlenecking? I saw the both cores on 95-100% usage during gaming.
thanks in advance