its a cm realpower 1000w, random
this off the cooler master website:
Specifications
Model RS-A00-EMBA
Type ATX Form Factor 12V V2.3 / SSI standard EPS 12V V2.92
Dimension (W / H / D) Standard ATX 150 x 86 x 180mm
Input Voltage 90~264V (Auto Range)
Input Current 15A@ 115 Vac / 8A@ 230 Vac
Input Frequency Range 47~63 Hz
PFC Active PFC(0.99)
Power Good Signal 100~500 ms
Hold Up Time >17 ms
Efficiency 83%(200W) / 85%(500W) / 81%(1000W)
MTBF >100,000 hrs
Protection OVP / OCP / OTP / OLP / Short / Full Protection
Output Capacity 1000 Watts Continuous
Max. Output Capacity 1,200 Watts
Operation Temperature 0~50°C Nominal Input Voltage?
Safety CE / cUL / TUV / NEMKO / BSMI / FCC / CCC / C-tick / GOST
Fan Ultra-silent 135mm fan with intelligent speed control
Certifications nVIDIA SLI / 80 Plus
Connector M/B 24 Pin Connector x 1
CPU 4 Pin x 1
CPU 8 Pin x 1
PCI-E 8 Pin x 2
PCI-E 6 Pin x 4
4 Pin Peripheral x 6
SATA x 8
4 Pin Floppy x 2
http://www.coolermaster.com/product.php?product_id=2519
so basically the psu is 83% efficent at 200watts, so figure that out your self!