Just found this thread. I've got two DL580 G7's with E7-4870's. I'm currently mining with 30 GPU's on standard mobo's. Never could get GPU's to work in these. Is it still profitable to set these up and eliminate the "small" rigs? I am currently running ZEC, but would switch out to something else if profitability is there. Would definitely want to swap CPU's to 8837's.
It all depends i would say. The DL580's are power-hoggers. What is nice is H/s per $ on the initial costs, but running them worth profit requires cheap electricity since there is a lot of overhead power drain on these systems. If your electricity is not cheap, i wouldn't mind moving my cards from the standard mobos. Perhaps you could take 1-2 PSU's from them switch to, since they are 90-95% platinum rated. Then you need breakout boards.
The power supplies that came with my five HP DL580 G7's are only Silver Rated. Efficiency ( % ) is 87% at 120 VAC and 89% at 240 VAC.
The following is found in the "HP Common Slot Power Supplies QuickSpecs - DA - 14209 Worldwide Version 1 March 6, 2012" PDF that I found somewhere on the internet. It is the only manual that had the exact part number match 490594-001 and 498152-001 for the HP DL580 G7 Power Supplies.
HP 1200W Common Slot
Silver Hot Plug Power
Supply Kit (500172-B21)
HP's Generic Part Number 490594-001
HP's Spares Part Number 498152-001
Input Voltage Range ( V rms ) 100-240
Frequency Range (Nominal) ( Hz ) 50 / 60
Nominal Input Voltage ( Vrms ) 100 120 200 208 220 230 240
Maximum Rated Output Wattage Rating 800 900 1200 1200 1200 1200 1200
Nominal Input Current ( A rms ) 9.7 9.0 7.0 6.8 6.4 6.1 5.9
Maximum Rated Input Wattage Rating ( Watts ) 930 1034 1348 1348 1348 1348 1348
Maximum Rated VA ( Volt-Amp ) 970 1079 1406 1406 1406 1406 1406
Efficiency ( % ) 86 87 89 89 89 89 89
Power Factor 0.97
Leakage Current ( mA ) 0.42 0.50 0.83 0.87 0.92 0.96 1.00
Maximum Inrush Current ( A peak ) 30
Maximum Inrush Current duration ( mS ) 20
Maximum British Thermal Unit Rating ( BTU-Hr ) 3174 3530 4600 4600 4600 4600 4600