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Best PSU?

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  • Power Supplies
  • Components
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February 10, 2010 10:31:39 PM

im looking for a good power supply for my current system which is: a 2.8ghz core 2 duo, 4 gigs of ddr2, 1 harddrive, 1 cd writer, and a geforce 9300. I plan on swapping out the graphics card for somthing along the lines of an ati 4890 or 5770. Im looking for a good psu over 500 watts, for about $80. I need some recommendations on a good psu, i do most of my shopping at newegg. Thanks for the help!!!!

More about : psu

a b ) Power supply
February 10, 2010 10:37:58 PM

Antec neo 620 for $79.99 with free shipping has 48a rating on a single 12v rail. I called their tech support line twice and got to speak to an individual. They stand behind their products.
February 10, 2010 11:14:35 PM

o1die said:
Antec neo 620 for $79.99 with free shipping has 48a rating on a single 12v rail. I called their tech support line twice and got to speak to an individual. They stand behind their products.

i have narrowed it down to neo 620 and this one http://www.newegg.com/Product/Product.aspx?Item=N82E168..., im concerned the most of getting a faulty unit and frying my system.
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February 11, 2010 2:53:35 AM

That Corsair 650 is an excellent choice.
a b ) Power supply
February 11, 2010 3:12:20 AM

Add one more vote to the TX650W.
February 12, 2010 9:58:44 PM

Between those two, I'd get the corsair, but if I remember correctly, they're both excellent choices.
a c 248 ) Power supply
February 13, 2010 12:04:38 AM

The Corsair TX650 is an excellent high quality power supply. Corsair has a reputation for high quality psu's. They consistently earn high marks in technical reviews. They are stable, reliable and come with a 5 year warranty.

I am afraid I cannot say the same for OCZ. A few weeks ago I read quite a few technical reviews of OCZ power supplies. I could not help but come to the conclusion that the quality of their product line is inconsistent. The OCZ ModXtream Pro, StealthXream Pro, and GameXtreme Pro 700 watt power supplies are all average psu's with the same problems. OCZ left out a couple of important features that are standard on high quality units.
February 18, 2010 10:31:14 PM

JohnnyLucky said:
The Corsair TX650 is an excellent high quality power supply. Corsair has a reputation for high quality psu's. They consistently earn high marks in technical reviews. They are stable, reliable and come with a 5 year warranty.

I am afraid I cannot say the same for OCZ. A few weeks ago I read quite a few technical reviews of OCZ power supplies. I could not help but come to the conclusion that the quality of their product line is inconsistent. The OCZ ModXtream Pro, StealthXream Pro, and GameXtreme Pro 700 watt power supplies are all average psu's with the same problems. OCZ left out a couple of important features that are standard on high quality units.


ok i purchased the corsair cmpsu-650tx 650w, only problem is idk if i should've of gotten the 750 watt. Due to the fact the my build will be a possibly (5870) crossfired system, for sure an i-7 most likely the 920, 2 harddrives and 2 cd writers. did i make the right choice?!?!
a c 248 ) Power supply
February 19, 2010 3:07:19 AM

You'll be fine. The high quality Corsair TX650 is quite capable of delivering 700 watts at peak load.

Here are the official power requirements for the ATI Radeon HD 5850 and HD 5870 video cards.


ATI Radeon™ HD5850 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard

500 Watt or greater power supply with two 75 watt, 6-pin, PCI Express® power connectors.

600 Watt or greater power supply with four 75 watt, 6-pin, PCI Express® power connectors for ATI CrossFireX™ technology in dual mode.


ATI Radeon™ HD5870 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard.

500 Watt or greater power supply with two, 75 watt, 6-pin, PCI Express® power connectors.

600 Watt or greater power supply with four, 75 watt, 6-pin, PCI Express® connectors for ATI CrossFireX™ technology in dual mode.

The power supply recommendations are for an entire pc system.

March 8, 2010 10:01:08 AM

Hello JohnnyLucky,
I read in the Corsair web page that the TX650 has 2x (6+2)-pin connectors. So in order to use the HD5850 in CrossFireX this PSU would be lacking two 75 watt connectors (four are needed in total). So I believe that a Corsair TX750 or the modular version HX650 (which does indeed has 4 connectors) would be needed. Is this correct in your opinion?

Many thanks!
a b ) Power supply
March 8, 2010 11:23:41 AM

well then just use pci-e molex adapters
March 8, 2010 11:59:51 AM

Many thanks shovenose, I didn't know these even existed but it makes a lot of sense. One other thing that stands out when comparing the Corsair PSU's to its competitors is that Corsair uses a single 12V line whilst others typically employ 2, 3 or even 4 12V lines with less Amps each (typically 18 to 25A). I believe that, originally, the idea behind this was to ensure a more stable power supply to the components but I guess Corsair thinks otherwise. Can anyone comment on the points for and against? I am very close to choosing a Corsair TX650 PSU.... just need to clarify this.
a b ) Power supply
March 8, 2010 12:04:13 PM

i personally donbt like multiple rails because then one must balacnce the load evenly blah blah blah lol i rather have one big rail
March 8, 2010 4:06:47 PM

shovenose said:
i personally donbt like multiple rails because then one must balacnce the load evenly blah blah blah lol i rather have one big rail

Not at all. A well designed multiple rail PSU will be set up such that you can fully load any of the connectors that you want and not overload any single rail. Honestly, as long as the PSU is well designed, it doesn't matter whether it has several rails or just one - it will work great either way. Besides, most "multi-rail" PSUs have a single actual rail, with several current-limited outputs.

Basically, single vs multi rail doesn't matter, so long as the PSU is well designed.
March 8, 2010 6:48:19 PM

Spiff73 said:
Many thanks shovenose, I didn't know these even existed but it makes a lot of sense. One other thing that stands out when comparing the Corsair PSU's to its competitors is that Corsair uses a single 12V line whilst others typically employ 2, 3 or even 4 12V lines with less Amps each (typically 18 to 25A). I believe that, originally, the idea behind this was to ensure a more stable power supply to the components but I guess Corsair thinks otherwise. Can anyone comment on the points for and against? I am very close to choosing a Corsair TX650 PSU.... just need to clarify this.

do it!!!!! i got mine and i must say im impressed, awesome build quality and 5 year warranty rocks
!