Which PSU is better? Antec VP550F or Cooler Master B500

Solution
Antec VP is a tier 3 power supply.
Cooler Master B is un-rated at this time.

We recommend that people only buy a Tier 1 or 2 power supply. The Power Supply List is what we look at to see how the power supplies are rated. Any Seasonic or XFX, and EVGA B2 model can be assumed to be either a Tier 1 or 2 power supply.
Antec VP is a tier 3 power supply.
Cooler Master B is un-rated at this time.

We recommend that people only buy a Tier 1 or 2 power supply. The Power Supply List is what we look at to see how the power supplies are rated. Any Seasonic or XFX, and EVGA B2 model can be assumed to be either a Tier 1 or 2 power supply.
 
Solution
Gotta love Cnet and their crappy review...

POWER
Type: power supply


I am certain it would have been a lot of extra work to type in ATX Power Supply...

Which leaves us to assume... ASS U ME.. not good.

Even Asus fails to list what it is...

Power Supply
350 W Peak


So much for that... Assume ATX sized (standard) power supply.

If you want to measure the power supply you have right now, if it is ATX sized, it should measure:

150 × 86 × 140 mm (5.9 × 3.4 × 5.5 in)