7 slot mobo 135$

[crazyates]

Is G530 the most power efficient CPU?

Actually no. The G530 has a TDP of 65Watts. The G440 (which is also only $41 on Newegg) has a TDP of 35Watts. Now these are power draw at max load, but the point remains.

Also, the G530 is a dual core, while the G440 is a single core. At idle (which is 99% of the time while mining), the difference is going to be something insignificant, however. I'm guessing like going from 10 to 15Watts? (totally uneducated guess)

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[420]

Is G530 the most power efficient CPU?

Actually no. The G530 has a TDP of 65Watts. The G440 (which is also only $41 on Newegg) has a TDP of 35Watts. Now these are power draw at max load, but the point remains.

Also, the G530 is a dual core, while the G440 is a single core. At idle (which is 99% of the time while mining), the difference is going to be something insignificant, however. I'm guessing like going from 10 to 15Watts? (totally uneducated guess)

Hmm, if anyone really knows what the wattage while mining is that'd make my day and not in the clint way

[MrTeal]

TDP is not the max power draw of the chip, it's a number used to let OEMs build sufficient cooling systems. You can probably find some apples to apples max power draw benchmarks out there, but I would guess that the difference between the two while mining is minimal, a few watts at most.

[crazyates]

TDP is not the max power draw of the chip, it's a number used to let OEMs build sufficient cooling systems. You can probably find some apples to apples max power draw benchmarks out there, but I would guess that the difference between the two while mining is minimal, a few watts at most.

I realize that that TDP refers not to the max power draw, but to the amount of heat a cooling system can dissipate. However, those numbers are there for a reason. If I single core chip is rated for use with a cooling system that can only handle 35W of heat, and another dual core chip is rated for 65W, you can expect it use about 2x the power at max load. It might not be exactly 2x at idle, but I'm guessing maybe 1.5x?

[MrTeal]

TDP is not the max power draw of the chip, it's a number used to let OEMs build sufficient cooling systems. You can probably find some apples to apples max power draw benchmarks out there, but I would guess that the difference between the two while mining is minimal, a few watts at most.

I realize that that TDP refers not to the max power draw, but to the amount of heat a cooling system can dissipate. However, those numbers are there for a reason. If I single core chip is rated for use with a cooling system that can only handle 35W of heat, and another dual core chip is rated for 65W, you can expect it use about 2x the power at max load. It might not be exactly 2x at idle, but I'm guessing maybe 1.5x?

Maybe something like that.
http://www.xbitlabs.com/articles/cpu/display/celeron-g540-g440_7.html#sect0
18W more at the wall at full load than the G440. Note how the G440 uses more than any of the low power chips at idle since it doesn't support EIST.

[crazyates]

TDP is not the max power draw of the chip, it's a number used to let OEMs build sufficient cooling systems. You can probably find some apples to apples max power draw benchmarks out there, but I would guess that the difference between the two while mining is minimal, a few watts at most.

I realize that that TDP refers not to the max power draw, but to the amount of heat a cooling system can dissipate. However, those numbers are there for a reason. If I single core chip is rated for use with a cooling system that can only handle 35W of heat, and another dual core chip is rated for 65W, you can expect it use about 2x the power at max load. It might not be exactly 2x at idle, but I'm guessing maybe 1.5x?

Maybe something like that.
http://www.xbitlabs.com/articles/cpu/display/celeron-g540-g440_7.html#sect0
18W more at the wall at full load than the G440. Note how the G440 uses more than any of the low power chips at idle since it doesn't support EIST.

Excellent graphs! So the 540 will pull 6W less than the 440 at idle, but 17W more at load. We only really care about idle, so I take it back: the 440 is not the absolute best for mining, assuming you're squeezing every last W out of your system. Still, for $41, it's hard to beat.

[420]

So I'd definately get the G530. If I retire it as a miner it would be more useful in other applications having a dual core and higher clock