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4870 PSU requirements - Page 2

post #11 of 23
Thread Starter 
Quote:
Originally Posted by PureOC Jim View Post
I would not use that PSU. The 12 volt rail has 28 amps and I believe you card has max draw of 24 amps. Factor in your other hardware and although it may work, using a PSU over 55% load will decrease the life. I am sure you will be far past 55% and this could lead to disaster up the road. Crossfire is out of the question. When looking at PSU's it is not always the wattage, it is the amps the rail(s) have. If you keep your avg. load under 55%, you will own a PSU to enjoy for many years with no worries. That said, I would not recommend that PSU period. The PSU is the last place to skimp.
Now you tell me AFTER I place my order?! Well what about a 500/550 watt?
post #12 of 23
I have not heard about killing a psu if you load it over 55%, however do realize that PSU's are tested at optimal temps, much lower than a average pc room in the summer heat. that said, 28amps on the 12v rail is probably slightly lower than I would like but it should run your rig fine- unless your folding 24x7 on your GPU and CPU.. personally yea I would get the 500/550w psu.
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post #13 of 23
Thread Starter 
So if I am not folding AT ALL? But running the computer say 8 hours a day (most of it gaming, sometimes idle) how would it fare? (or fair, dunno)
post #14 of 23
Quote:
Originally Posted by Killam0n View Post
I have not heard about killing a psu if you load it over 55%, however do realize that PSU's are tested at optimal temps, much lower than a average pc room in the summer heat. that said, 28amps on the 12v rail is probably slightly lower than I would like but it should run your rig fine- unless your folding 24x7 on your GPU and CPU.. personally yea I would get the 500/550w psu.
I do not want to get in a debate why or how much to load a PSU. This is the last place to skimp. Not only is that rail somewhat loaded, he cannot entertain adding anything on to the system. Better to be safe than sorry. A higher watt PSU with more amps means maybe $20 but penny pitchers may not want to spend $20 more. Yes OP, the CX650 IS FINE.....
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post #15 of 23
Quote:
Originally Posted by assaulth3ro911 View Post
Now you tell me AFTER I place my order?! Well what about a 500/550 watt?
OP, I did not tell you cause I just came by the thread!
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post #16 of 23
I really don't see anything wrong with the CX430 V2 especially if you've already got another unit in line down the road. It's a solid unit for non-enthusiast rigs. If you really get serious about what you're putting into your computer, you may want to upgrade. But for a 4870, I'd say you're golden.

http://www.jonnyguru.com/modules.php...Story&reid=239

^^Jonny Guru is basically the most trusted name in power supply reviews.
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post #17 of 23
Thread Starter 
Thank you, and I love pet rocks!

Also I'll see if this 550 watt I'm getting is a professional grade gaming PSU, to see what I am going to do
post #18 of 23
Thread Starter 
Quote:
Originally Posted by PureOC Jim View Post
OP, I did not tell you cause I just came by the thread!
I know I'm just playing

Thanks for the advice!
post #19 of 23
I would never buy a CX PSU, most of them are horrible units. I believe the CX 430 is the only half-decent PSU in that series, but I'd feel extremely limited with that PSU.

Get a 500-600W and be done with it. I don't understand why people are always trying to find the cheapest PSU available while it's probably the most important part of your computer.
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post #20 of 23
I ran a factory overclock 4870 on a 420watt PSU for about 1.5 yrs without any problems.
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