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jchambers28

join:2007-05-12
Alma, AR
reply to Krisnatharok

Re: loud corsair HX1050

500 watts being pulled from the wall.


Krisnatharok
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join:2009-02-11
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kudos:12
And an 80 PLUS PSU is >80% efficient, sooo....


jchambers28

join:2007-05-12
Alma, AR
the old 80 plus silver units are gone and the 80 plus gold units are here.


Krisnatharok
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join:2009-02-11
Earth Orbit
kudos:12

1 edit
Remember that *max* efficiency of the HX1050 is 88% (86% under 110VAC, and 89% under 230VAC), which is under ideal conditions/load.

At half load (535w), your PSU just misses the SILVER mark and performs at 86% efficiency, which is between SILVER and BRONZE.

»www.overclockersclub.com/reviews···50/5.htm


The Corsair HX1050 produced a fairly typical set of results in this section that fell a little short of the 80 Plus Silver requirements (85%, 88% and 85% efficiency at 20%, 50% and 100% DC loading) following the OCC power supply testing methodology. The OCC power supply testing methodology doesn't exactly replicate the rail loadings and a shortfall of one or two percent isn't unusual so it would be unfair to mark the power supply (or any other that produced similar results) down in this section. Power factor levels are rarely if ever a problem in high end power supplies, especially with a 110VAC supply, and the HX1050 easily kept the level above the required 0.9 mark at 50% DC loading.

As the article says, we're essentially arguing semantics. You bought a much larger PSU than you needed, but it's not going to cost you much in terms of inefficiencies, and it's not going to harm anything.


Krisnatharok
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join:2009-02-11
Earth Orbit
kudos:12
reply to jchambers28
said by jchambers28:

500 watts being pulled from the wall.

That's about 430w in power coming out of your PSU to the rig, then.

I would have recommended a PLAT-rated 500-550w PSU, but whatever floats your boat, man.
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.


jchambers28

join:2007-05-12
Alma, AR
that's with 1 card BTW. I will be adding another one later. I want 680 performance with out the cost of a 680.


Krisnatharok
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join:2009-02-11
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With what? A 660Ti or 560Ti? I can't remember what you ended up going with.

»[Parts Check] new build

Weren't you the guy who Crossfired 5850s? Or was that Oleg?

A second GTX 660Ti adds 150w load (max), a GTX 560Ti adds 170w load (max), so my recommendation of a 500-550w would jump to a 650-700w PSU if you go SLI.

People don't need such gigantic PSUs as they think.
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.


jchambers28

join:2007-05-12
Alma, AR
it wasn't me. I went with a 660TI.


Krisnatharok
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join:2009-02-11
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Ah, ok, just checking. Someone was running low-end GPUs in Xfire/SLI and disappointed with their performance about a year ago. At least you're using sufficiently powerful cards to see an advantage.

But I don't understand the reasoning--if you end up going 2x 660Ti's, you will pay more, unless you wait for the GTX 700 series come out, when you pick up an obsolete card at a reduced rate. Even then, it's a lot of waiting at half power (in terms of what you can afford) for a marginal amount of savings.

The cheapest 660Ti is about $250, whereas the cheapest GTX 680 is $410, which is about $90 cheaper than two GTX 660Tis *and* unlike SLI, the 680 will always perform much closer to its performance ceiling (SLI is never near 100% efficient in terms of scaling).

Short of a bargain deal on 660Ti's, you'd be better off grabbing a single GTX 680.
--
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.