I now have 4 machines here running on 120V. One is personally mine. The other three belong to wanna4fun, our first customer. (He gave me permission to mention him.) I have mine set up to exceed Zvi's recommendations for power for the PSUs, and it's getting about 4080 GH/s....
I should be able to start migrating our machines over to 258V later today. I'll probably have some statistics on 258V to share tomorrow.
I've successfully migrated our SP30s over to our 258V supply. Performance is up.
| Device ID | Hashrate (cgminer) | AC power usage | Top PSU lim (DC) | Bot PSU lim | J/GH |
| Mine | 4527 GH/s | 3024 W | 1362 | 1367 | 0.668 |
| Wanna1 | 4476 GH/s | 2928 W | 1345 | 1351 | 0.654 |
| Wanna2 | 4459 GH/s | 2960 W | 1344 | 1347 | 0.663 |
| Wanna3 | 4470 GH/s | 2992 W | 1349 | 1349 | 0.669 |
I also have an SP10 hashing at 1490 GH/s under the same conditions.
Intake temps are 26°C to 28°C, as measured by both IR thermometer and the machines themselves.. I'm still working on cooling equipment for my DC, and it's daytime still. Temps should be lower in the future.
Edit: Updated performance on mine. Was 4494 GH/s, but I tweaked it.