Which mining of Monero is more cost efficient CPU or GPU?

Question

Which mining of Monero is more cost efficient (both use same expensive energy) CPU (INTEL CORE I3-6300T LOW POWER TRAY PROCESOR - CM8066201927004) or GPU (Nvidia 750Ti)?

I know GPU mining gives you higher hashrate but it also uses more energy.

Answer 1

The NVIDIA 750 Ti returns about 250 H/s with about 60W of energy (hash source, wattage source).

I do not have data on the i3-6300T, but the AMD FX 8350 also returns about 250 H/s (source), and this should be a faster processor than the i3-6300T (I'm guessing 150 H/s). The i3-6300T uses about 30W (source).

Use the Monero mining calculator here to determine which is best for you based on your energy cost.

Answer 2

According to MoneroBenchmarks, the i3-6300 does 150H/s at 65W and the Nvidia 750Ti does around 250H/s at 60W. So, seems that at the same energy expense the GPU card can give you definitely more hash rate.

Update: AMD Ryzen CPU and AMD RX 550/560 GPU cards can mine Monero with high hashrate and low power consumption. Also RX570/580 and VEGA cards have nice rate/power ratio. For building a cheap rig with a decent hashrate and really low power consumption, AMD RX 550/560 GPU cards are the most used solution.

Check this answer for more details about which type of hardware is the most efficient for mining Monero.

Answer 3

The most efficient way to mine Monero now is using AMD Radeon Vega 56/64 cards.

Overclocking the HBM and undervolting the card while runing Cast's XMR miner gives about 2 KH/s for about 150W.

An i3 6100T will net you around 60-80 H/s on xmr-stak-cpu optimized by fireice with settings tweaked which is neglegible as most pools pay out at >0.5 XMR.