WelshBloke
Lifer
- Jan 12, 2005
- 30,433
- 8,097
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I found out that Nvidia cards apparently have issues with downclocking in 2D. The drivers seem to randomly fix and break this feature. So, what I did was manually downclock. I took each of the three clocks and gradually lowered them until tests failed. This is a GDDR5 model, FYI.
I started out with:
Core - 550mhz
Memory - 1700mhz
Shader - 1340mhz
I ended up with:
Core - 150mhz
Memory - 1150mhz
Shader - 350mhz
I started out with using 106 watts at idle. After these changes, I was using 103 watts at idle, only a decrease of 3 watts. I think the reason why the change was so small is because I haven't yet (if possible) changed the voltages. I have to look into it but the 240 might be locked down. I think that's where the big power decrease is lurking.
Also, FYI, I used the Control Panel to find out the Optimum settings. The result was:
Core - 649mhz
Memory - 1938mhz
Shader - 1516mhz
When in idle state with these frequencies, the power went up to about 108w or a gain of 2 watts.
How are you measuring power usage?
I'm pretty interested in seeing the results when you start changing the voltages.