Output Characteristics


Everything looks really good in the output department with the Neopower 650W being able to deliver nearly all of its power through the all-important +12V rails. The 19A (228W) available on each +12V rail is sufficient to power nearly any hardware combination you might have but there is no indication of which +12V rail is responsible for what.

Upon first glance it looks like the PCI-E 8-pin would be on its own virtual “rail” with a 19A OCP circuit while the second PCI-E connector is on the same virtual rail as the SATA and Molex connectors. Finally, the CPU connector is on its own separate “rail” as well. I can’t test this theory since I have no way of loading 19A on a single rail but if the Neopower is not set up like this, I have my money on the possibility it is set up like the HX620 which means it is a single rail unit.


PERFORMANCE TESTS

Instruments Used:

Belkin 1100VA UPS
Rexus PSU tester
Fluke 187 Digital Multimeter
UPM Power Meter
USB Instruments Stingray USB O-Scope
USB Instruments Differential oscilloscope probe

Test Platform:

DFI Lanparty SLI-DR Expert
AMD X2 3800+ (at 2.6Ghz)
2GB Corsair PC4000 Ram (at 520Mhz)
EVGA 8800GTS (Stock, OC 650/1900, SLI, SLI OC 650/1800)
1x Samsung Spinpoint 250GB SATA Hard drive
Gigabyte 3D Aurora 570 Case
Pioneer DVD Writer
4X 120mm Noctua NF-S12-1200 fans

Important note:

Because of processor limitation, 8800GTS cards in SLI are seriously bottlenecked in Company of Heroes. Thus, while they still drew quite a high amount of power, when coupled with a higher end system or playing at higher resolutions they would probably draw much more.

One way or another, I would NOT recommend anything under a good 700W power supply for a pair of 8800GTS cards. These tests are done as benchmarks ONLY.