You are overpaying for the 60mh/s AND paying more electricity as the APU uses more power then a CPU with the same power. And you are using 50 watts over a sempron 140 that would make the most sense in mining.
Sorry but your logic is flawed and you are simply wrong.You're saying that using a Sempron 140 sitting around doing nothing and draining 50w is better than an APU hashing at 65-75mh/s and draining nearly the same energy?
You think the APU will drain 100w at 65mh/s?
Nope. The 5870m in my Alienware laptop has a TDP of 50w and hashes at 152mh/s at stock clock. The APU was designed from the Mobility series and has an even higher efficiency rating than the Mobility series. So, like I said, the hashing power of the APU is nearly free (compared to an equivalent CPU).
There is no reason to build a rig from this point forward with a useless CPU when you could be using that slot for efficient extra hashing.
The a8 that will do 65 mh/s APU is rated at 100W and the Sempron is rated at 45w. You are paying $90 more for the cpu, and you are drawing 55w more power. The Sempron has only one core (at least one turned on), the A8 has four. Even idle they waste some power.
You say the hashing power is free. It is not and I am not wrong.
You're practically saying that while the APU is hashing, the CPU will also have high load? If only the APU is hashing, the CPU cores will idle, thus not consuming the full TDP of the chip.
And dont compare the power consumption of a discrete card to the power consumption of the APU which is only a slice of the chip. The APU will be comparable in performance to a 5570 or 6570 but the TDP of the APU alone is lower than the TDP of any of the said cards. That 100w is both CPU and mini GPU, and if I was buying one of these chips, I definitely wont buy the A8-3850. I will choose the A8-3800 which only have 65w TDP.
