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Need help in chosing a new power supply

Last response: in Graphics & Displays
June 6, 2012 4:33:22 AM

Currently I have...
Processor: Intel Core i7 950 @3.07
Motherboard Stuff
Pegatron Corp.
Model: Truckee 1.03

Memory: 12G of DDR3
GPU: Radeon HD 4850
1TB Hard drive
250GB Hard drive
Card reader, bluray r/rw,and dvd r
Power Supply Model:HP AcBel API5PC57 460W

I wanted to upgrade to the Radeon HD 7850

What kind of power supply would I need?
and What is the difference between single rail and multi-rail...etc?

More about : chosing power supply

a b U Graphics card
a b ) Power supply
June 6, 2012 6:06:11 AM

AMD specify as below:
500W (or greater) power supply with one 75W 6-pin PCI Express power connector recommended
600W power supply (or greater) with two 75W 6-pin PCI Express power connectors recommended for AMD CrossFire™ technology.
You can get good brands like Corsair and Seasonic. They are more expensive that other brands with the same capacity but that is because they use good design & quality material for better performance & tolerance to overloading.

For your case, I would recommend to prepare for the possibility of Crossfire in the future so please consider this:
Related resources
a c 291 U Graphics card
a b ) Power supply
June 6, 2012 8:55:58 PM

Umm it's one of the best PSUs available but why would you spend so much on the power supply? Better save money and buy a better graphics card instead...
a b U Graphics card
a b ) Power supply
June 7, 2012 4:27:40 AM

It does not really matter... Having multi rail does not make the Antec better than Corsair... Perhaps this will be useful:
I quote:
"The bottom line is, for 99% of the folks out there single vs. multiple +12V rails is a NON ISSUE. It's something that has been hyped up by marketing folks on BOTH SIDES of the fence. Too often we see mis-prioritized requests for PSU advice: Asking "what single +12V rail PSU should I get" when the person isn't even running SLI! Unless you're running a plethora of Peltiers in your machine, it should be a non-issue assuming that the PSU has all of the connectors your machine requires and there are no need for "splitters"."