I was also running cryptonight on 2 CPU cores & atleast 10 POS coins were staking . So take these results with a grain of salt. My machine is i5 4670, 8GB RAM, Win7 64-bit, MSI GTX970 & GTX750ti. I measured power consumption using APC Powerchute s/w for the cards only not whole machine. I basically noted the difference in power consumption while machine was idle & while mining. There was very little fluctuation so figures are pretty accurate.
Sample config: ccminer.exe -d gtx750ti -q -s 1 -a ALGO -o POOLURL:PORT -O USER:PASS [scrypt/cryptonight switches]
Algo KHash 970 KHash 750ti Total KHash Power 970 Power 750ti Total Power Pool Used
===========================================================================================================================
Quark 13300.00 5150.00 18450.00 164 W 43 W 207 W NiceHash
Neoscrypt 475.00 162.00 637.00 155 W 50 W 205 W NiceHash
NIST5 22100.00 8520.00 30620.00 155 W 50 W 205 W NiceHash
X11 7450.00 2810.00 10260.00 164 W 43 W 207 W NiceHash
X13 5940.00 2225.00 8165.00 164 W 45 W 209 W NiceHash
X15 5150.00 1950.00 7100.00 160 W 43 W 203 W NiceHash
Lyra2RE 1098.00 701.00 1799.00 112 W 34 W 146 W NiceHash
Skein 268000.00 86000.00 354000.00 164 W 40 W 204 W Digibyte NOMP
Qubit 11450.00 4475.00 15925.00 160 W 40 W 200 W NiceHash
Keccak 430000.00 157500.00 587500.00 155 W 43 W 198 W NiceHash
WhirlPoolX Vanillacoin is Pure POS for a month so cant test
CryptoNight 0.36 0.20 0.56 104 W 26 W 130 W Minergate
Scrypt NF15 2.77 0.98 3.75 164 W 52 W 216 W UTC TumblingBlock
Scrypt NF16 0.78 0.35 1.13 130 W 44 W 174 W UTC TumblingBlock
Groestl 20500.00 7420.00 27920.00 172 W 64 W 236 W GRS Dwarfpool
Scrypt 507.67 272.07 779.74 173 W 60 W 233 W NiceHash
Scrypt-N 252.00 140.00 392.00 173 W 60 W 233 W NiceHash
Regards
Sam