Re: Claymore's ZCash AMD GPU Miner v4.0

What cpu should I buy to improve my solrate?
I have now celeron g1840 and my best rate is with -i 0,
with -i 1 is less and with -i 2 my rig freezes.
Higher "-i" have no impact even if I choose only one card with -di parameter :S
i have rx 480 rx 470 and r7 370

I have observed the same scenario and would also like to know the answer.
Will Pentium help? (I guess no, but maybe latest skylake?)
Will i3 be enough for 6, 7 card rigs, or we have to go i5?

I haven't heard anyone with an i3 complaining about 100% CPU usage, so an i3 is probably ok...i5 for sure. I would stick with haswell socket 1150 chips though so you don't have to spend extra on a board and ram...just drop it in!

My friends has i5 and his rig with rx480 hangs too on -i 2 intensity..

If it hangs, probably due to unstable GPU clocks, voltages etc, and not CPU load. If CPU isn't fast enough, miner just slows down. -i 2 may stress gpu too much.

buying new cpu just for this (run I2 instead of I0) is a bad idea, you never gonna paid you cpu back
better buy 1 gpu more with the same money

Ok but I have now cpu for about 40usd..
I found about 2times better cpu (according to benchmarks) for about 70usd.
So if it could give me few % more it could be worth it..

Its not worth it, going from a Sempron to a i3, I get less than 5% hashrate difference.

Pretty soon someone will recode this SilentArmy kernel and it won't rely on CPU usage.

Sometimes its not the CPU but the Riser not being able to handle all that bandwidth.

So 16-16x risers could be better?

Yes those will always be faster and less incorrect shares errors.

@adaseb I'm currently using the USB 3.0 powered risers on all my rigs (R9 290s and RX 480s 8GB). Is there something better to use, i.e. 16-16x risers? If so, how do you power them or is it not needed? Thanks!

Right now don't buy anything wait until this kernel is improved and relies less on CPU usage.