HP ProCurve 600$518.00 to $1,374.00

The HP ProCurve 600 Redundant and External Power Supply provides 12V RPS for up to 6 stackable switches and 2 ports with 370W 50V PoE.
Manufacturer:Hewlett Packard Product MPN MPN | J8168A#ABA | Key Features Wattage | 729 Watt | Dimensions Width | 12.8 in. | Depth | 17.4 in. | Height | 1.7 in. | Weight | 11.77 lb. | Miscellaneous UPC | 829160221786 |
Tags:hp, procurve, 600,
| Antec TruePower Quattro TPQ850EC$144.00 to $242.00

This Antec TruePower Quattro (TPQ850EC ) power supply unit provides power of 850 watts.
Manufacturer:Antec Product MPN MPN | 0761345-27850-8 | Key Features Wattage | 850 Watt | Miscellaneous UPC | 0761345078504 |
Tags:antec, truepower, quattro, tpq850ec,
| Corsair Memory CMPSU-850TX$128.00 to $237.00

The Corsair TX power supplies are engineered using technology and components typically found with high performance power supplies. With design features such as a dedicated, single +12V rail offer the maximum compatibility with the system components.
Manufacturer:Corsair Memory Product MPN MPN | CMPSU-850TX | Key Features Wattage | 850 Watt | Number of Fans | Single Fan | Compatibility | EPS12/ATX12 | Power Properties DC Output | +3.3V @ 30A, +5V @ 30A, +5VSB @ 3A, +12V @ 70A, -12V @ 0.8A | Other Features MTBF | 100000 Hours | Dimensions Width | 5.9 in. | Depth | 6.3 in. | Height | 3.4 in. | Warranty Warranty | 5 Years | Miscellaneous UPC | 843591003346 |
Tags:corsair, memory, cmpsu-850tx,
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The Signature 850 features DC to DC voltage regulator modules which ensure greater system stability, and an 80mm Pulse Width Modulation (PWM) fan which can run up to 50% quieter than standard fans.

This Antec BP500U power supply unit provides power of 500 watts, it's fully compatible with ATX 12V.

The Lifetime Series Power Supply supports all Intel and AMD platforms, SATA devices and PCI Express graphics cards. This power supply also includes short circuit protection, in-rush current protection and thermal overload cutoff protection.

This Antec BP350 power supply unit provides power of 350 watts, it's fully compatible with ATX 12V.