If we check out the Tiered PSU list at XtremeSystems. We can see the Zippy HP2 series PSUs are in Tier 2 along with such units as the FSP Epsilon. This is how highly they're rated. I know the list is "only" the XS community's opinions, but their opinions mean a lot as much like Guru3D they're a very highly rated community.

Here's more info on the 500 Watt version HP2-6500P ...

Dimensions

150x86x140  (WxHxD) (mm)

Specifications

Output Voltage	Output Current Min (amps)	Output Current Max (amps)	Regulation Load	Regulation Line	Output Ripple & Noise Max
5v	2.5	40	5%	1%	60mV
12v	1	36	5%	1%	100mV
-5v	0	1	5%	1%	100mV
-12v	0	0.8	5%	1%	100mV
3.3v	1	30	5%	1%	60mV
+5VSB	0.1	2	5%	1%	60mV

Features

• Support Intel ATX12v/Intel EPS12v
• Support AMD Athlon/Opteron CPU
• Case black aluminium alloy/Anodizing treatment
• Dual 6-pin for PCI-E/SLI Multi GPU ready
• Smart fan control
• Three independant OVP/OCP/OPP protection
• Active PFC
• Easy unplug drive connectors

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