430W PSU enough?

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aktechguy

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Jan 19, 2013
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Here's the short question: Will a 430W Corsair PSU (CX430) be sufficient to run some of the low to mid-range Tom's suggested GPUs, such as the 7770, 7790, 7850, or 650 Ti Boost?

Now I know some folks have posted on this before... and the general consensus I read (at least for the 7770 and 7790) were that a 430W was sufficient.

However, I have quite a few components in my system, and I wanted to make sure I wasn't over-taxing my PSU:

Motherboard: ASRock H77 Pro4-M
CPU: i5-3470
RAM: 8 GB DDR3

3 hard drives:
-120 GB Samsung SSD
-1TB Western Digital HDD
-256GB laptop hard drive

2 optical drives:
-DVD writer w/ lightscribe
-Bluray writer

Not that this probably matters, but I also have two monitors hooked up to my system.

What do you all think? Is the 430W PSU sufficient for these GPUs? Even with 3 hard drives and 2 optical drives? I just don't want to damage anything. I built this PC last February... and its my first build. I've been using intel's integrated graphics, but I'm ready to step it up.

Thanks!

 
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coastie65
The 7770 & 7790 should be fine, not the other two. That PSU has 28a on the +12v rail and shpould ber enough for at least the 7770 and maybe the 7790. Not sure of the other one and definiately not for the GTX 650Ti.
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coastie65

coastie65

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The 7770 & 7790 should be fine, not the other two. That PSU has 28a on the +12v rail and shpould ber enough for at least the 7770 and maybe the 7790. Not sure of the other one and definiately not for the GTX 650Ti.
 
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fudoka711

fudoka711

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Er, he will be fine with that PSU. The GTX 650Ti is supposed to draw no more than 24 amps on the +12v rail (and that psu has 28A), but I've been reading that it actually draws less than that. The 7850 requires even less power.

http://www.tomshardware.com/answers/id-1667509/gtx-650-boost-2gb-400w.html

http://www.tomshardware.com/answers/id-1659316/12v-rail-compatibility.html

And again, don't worry so much about the 430W being 20W lower than the 450W requirement. That's nvidia's worst case scenario PSU requirement (if you were buying a cheap no-name brand, which you are not).
 
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coastie65

coastie65

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That's not a lot of headroom on the rail and you could have problems. I had a Video card where the PSU met the requirements including the minimum on the rail ( 18a ) and I got into a game that had some rather intensive graphics at one point and things did not go well and didn't until I replaced the PSU with one with plenty on the rail and overkill as far as the wattage went. I usually recommend plenty of headroom on the rail for that reason, and you have plenty for future upgrades.
 
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aktechguy

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Jan 19, 2013
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You guys rock... thanks for the recommendations. That's really helpful and I learned something today. Thanks.

One more question... and I know this one is probably impossible to know for sure...

Do you think the 7790s will drop much in price before the holidays once the next-gen consoles hit the market? I was wondering if it would be worthwhile to wait a month or two.... but Amazon has a decent deal on the Asus 7790... with a $20 rebate makes it $110 and you get a free game with it. I don't really need the graphics card right away, however.

Any body want to make a guess? :)

Thanks!
 
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aktechguy

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Very interesting, thanks!
 
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coastie65

coastie65

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That's a big drop, not to mention you get a FREE game. We are in the 4t Quarter and the holiday shopping season on the horizon, could be something coming, but I don't know what if anything. Just a thought.
 
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aktechguy

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When you say "something coming", I assume you mean they might release a new GPU? Besides their "new" (old) R7 260X? If so, I can't imagine the price on the 7790 would get any lower? What are your thoughts?

Thanks!
 
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coastie65

coastie65

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Like I said, it was just a thought. I haven't really heard of anything coming either from AMD or Nvidia in the quarter. I have been seeing stuff on the R7 260X, but it's just mostly test stuff. That thing may be something that was rebranded, with a little tweaking. Right now you are getting into the prime season for new releases of stuff ( gaming consoles anyone? ) I was thinking that Intel had another processor coming this quarter, but it may been moved to next year.
 
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aktechguy

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Jan 19, 2013
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Ok, thanks!
 
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