GTX 970 overclocking: raising voltage leads to core clock growth?
GTX 970 overclocking: raising voltage leads to core clock growth?
At first, sorry for my poor English.
I own an MSI GTX 970 Gaming. Its boost clock is 1316 MHz while gaming without any oc.
If I set core clock +150 MHz and memory clock +400 MHz (without increasing voltage), then core clock will be 1466 MHz, but when gpu-using reaches 99-100%, core clock falls back to 1454 MHz. I believe it's throttling, isn't it?
But! If I raise the voltage by +25mV, core clock starts at 1479 (more than it could be with the +150), and when gpu-using reaches the 99-100%, core clock returns to the correct 1466 MHz.
What does this mean?
Is increasing voltage causing a slight increase in clock speed?
I know that sometimes clock adjustments require some voltage boost to avoid throttling. But why does core clock jump to 1479 first, and then drop back to the intended 1466 when gpu-using hits the maximum? Why don't it start at 1466 and stay there?
At first, sorry for my poor English.
I own an MSI GTX 970 Gaming with a boost clock of 1316 MHz while gaming without any overclocking.
If I adjust the core clock to +150 MHz and the memory clock to +400 MHz (without changing voltage), the core clock would reach 1466 MHz, but when using the GPU at 99-100%, it drops back to 1454 MHz. I believe this is throttling, isn't it?
But if I raise the voltage by +25mV, the core clock starts at 1479 (which is higher than what +150 would allow), and when the GPU usage hits 99-100%, it returns to the correct 1466 MHz.
What does this suggest?
Could increasing the voltage slightly cause the clock to rise a bit?
I know sometimes a little voltage boost is needed to prevent throttling, but why does the core clock jump so high?
At first, sorry for my poor English.
I own an MSI GTX 970 Gaming with a boost clock of 1316 MHz while gaming without any overclocking.
If I adjust the core clock to +150 MHz and the memory clock to +400 MHz (without changing voltage), the core clock would reach 1466 MHz, but when using the GPU at 99-100%, it drops back to 1454 MHz. I believe this is throttling, isn't it?
But! If I raise the voltage by +25mV, the core clock starts at 1479 (which is higher than the +150 setting) and then returns to the intended 1466 MHz when the GPU usage hits 99-100%.
What does this suggest?
Could increasing the voltage slightly cause the clock to rise a bit?
I understand that sometimes a voltage boost is needed to prevent throttling, but why does the core clock jump to 1479 before settling back to 1466 at full GPU load? Why not maintain 1466 continuously instead?
Check the GPUz sensors tab. The PerfCap Reason line. It seems your card might be experiencing power or thermal throttling.