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Should I get a Dual-Rail PSU?

  • Power Supplies
  • Dual Rail
  • AMD
  • New Build
  • Components
Last response: in Components
March 17, 2010 10:33:09 AM

Hi guys, just pricing up a new build. Think I'll go with AMD.

Here's my question, should I go with a Dual-Rail or Single-Rail PSU? What is the difference?


More about : dual rail psu

March 17, 2010 10:42:16 AM

Just found a Quad-Rail for £5 more, so I guess my question now is Single, Dual or Quad Rail?
March 17, 2010 10:48:41 AM

You should go with a quality PSU, no matter how many rails it has. Some people claim having 1-2 rails with high Amperes is better but I believe if you get a good brand PSu (like Enermax, PCP&C, Thermalright and many more). THere are calculators where you input your build details and give you a watt estimate. Based on that go out and get one and don't be stingy!! The PSU is the most essential unit in a PC!
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March 17, 2010 10:48:50 AM

Don't worry about the rail business.

Just check whether the PSU is of a decent brand and meets your needs.

BTW what are the specs of your rig?
March 17, 2010 10:54:38 AM

Multi rail psu divide their power per rail. You can't get all the amps your psu offers on the same rail. Instead, it's divided between them.
Theoretically, single rail psu are better for you don't have to wonder if your amps demand is higher than what the rail you are using has to offer. However, if you are no planning on lots of heavy parts (2x5970, plus 980OC), it won't make a difference.
March 17, 2010 11:43:30 AM

Currently I'm looking at:
AMD Phenom II X4 965 BE
XFX ATI Radeon HD 5770 XXX Edition
At least 4GB of 1600 DDR3 RAM
Then just the usual Optical, HD etc.