eXternal Optimizations

[padrino121]

Testing on 8X GPU system, 75H/s per Radeon 470 https://bitcointalk.org/index.php?topic=1666489.msg16843510#msg16843510

[rbrtio]

Tested on single RX 470/4GB system with GPU at 1074 and VRAM at 1945 and received the following results.

Total 70.4 sol/s [dev0 68.0] 45 shares
Total 71.0 sol/s [dev0 69.5] 46 shares
Total 71.9 sol/s [dev0 72.3] 46 shares
Total 72.8 sol/s [dev0 73.6] 46 shares
Total 73.4 sol/s [dev0 74.1] 46 shares
Total 73.0 sol/s [dev0 73.9] 46 shares
Total 73.3 sol/s [dev0 74.4] 46 shares
Total 73.6 sol/s [dev0 74.6] 46 shares
Total 73.3 sol/s [dev0 75.4] 46 shares
Total 73.3 sol/s [dev0 74.2] 47 shares
Total 72.3 sol/s [dev0 71.4] 48 shares
Total 71.0 sol/s [dev0 68.8] 48 shares
Total 70.6 sol/s [dev0 67.4] 48 shares
Total 70.9 sol/s [dev0 66.2] 48 shares
Total 70.8 sol/s [dev0 64.7] 48 shares
Total 70.9 sol/s [dev0 65.8] 49 shares

[maharius]

~60 sol/s each on HD7970 and R9 280

[Kubuxu]

Getting about 70Sols/s on RX480

[asluchevskiy]

~70 RX470 1500>1750 timings, stock clocks

[Kubuxu]

Getting about 64-68 on GTX1070 on one instance.

[mbevand]

Merged and released into SILENTARMY v5 - thanks eXtremal!
b879b79