CORSAIR 520watt with 480GTX....

james.miller · 30 Jan 2011 at 23:48

MikeHiow said:
You believe that overclocking the 480 will increase it significantly enough that the PSU will need replacing?

I mean, going by that video you've still got another 30W left until you reach 75% of the PSUs rated power.

yes, see my edit

. note i ignored the horrendous figures recording on the furmark run - 180w increase.

MikeHiow · 30 Jan 2011 at 23:50

[TW]Fox;18352554 said:
The HX520 is rated at 52A on the 12v rails isn't it?

3x18A 12V rails, apparently. Which is more than fine, as each PCI-E connector will be on a different rail.

edit: too slow.

Mr Krugga · 30 Jan 2011 at 23:51

MikeHiow said:
3x18A 12V rails, apparently. Which is more than fine, as each PCI-E connector will be on a different rail.

edit: too slow.

Triple 12V Rails provide independent reliable power to the CPU, video card and other components with a combined rating of 50A (40A on 520W) maximum! Advanced circuitry design that automatically enables power sharing between the triple +12V rails in an event of overload on any single +12V rail.

Seems to be 40A after all?

http://www.silentpcreview.com/article692-page1.html

GeForce GTX 480

On your average system the card requires you to have a 600 Watt power supply unit. We recommend at least 40 Amps in total available on the +12 volts rails (accumulated).

http://www.guru3d.com/article/geforce-gtx-470-480-review/13

james.miller · 30 Jan 2011 at 23:54

MikeHiow said:
3x18A 12V rails, apparently. Which is more than fine, as each PCI-E connector will be on a different rail.

edit: too slow.

18A x 12V = 216w per rail. three rails, thats 648 watts. remember, the 520w's 12v total output is limited to 480w, which means it's more like 3x 13a rails which paints a slightly different picture.

[TW]Fox · 30 Jan 2011 at 23:55

So now the 480 WONT run on the HX520W? :confused:

So we must all now run out and spend £140 on a new PSU? Because it seems Corsair have stopped offering modular power supplies for under a million pounds and I'm damned if I'm going back to a PSU with a snakes wedding of cables I don't want or need permanently hanging out the back.

Infact its proably cheaper to just buy a GTX 570?

MikeHiow · 30 Jan 2011 at 23:55

I'm sat here trying to think how 3x18A and 40A fit together. Unless that is the maximum on any one rail with the 'power sharing' functionality, I don't know?

Mr Krugga · 30 Jan 2011 at 23:55

james.miller said:
18A x 12V = 216w per rail. three rails, thats 648 watts. remember, the 520w's 12v output is limited to 480w. its more like 3x 13a rails which paints a slightly different picture, dont you think?

That is in case of an overload, the load changes independently on the rails.

[TW]Fox · 30 Jan 2011 at 23:57

Mr Krugga said:
http://www.guru3d.com/article/geforce-gtx-470-480-review/13

What? So now the HX520W will run it?

I'm going to bed before my head explodes.

james.miller · 30 Jan 2011 at 23:57

Mr Krugga said:
That is in case of an overload, the load changes independently on the rails.

also, dont forgot these psu's do not have 3x separate rails, it's one combined 12v output - it doesnt matter how the load is split.

[TW]Fox;18352627 said:
What? So now the HX520W will run it?

I'm going to bed before my head explodes.

yes it'll be fine. just dont overclock it. ever.

that guru 3d article says at least 35 amps on the 12v rail. that's what you'll need to run it at stock, nothing more. if thats fine with you than the hx520 is fine for you, probably.

MikeHiow · 31 Jan 2011 at 00:01

[TW]Fox;18352627 said:
What? So now the HX520W will run it?

I'm going to bed before my head explodes.

It will run it, but if that forum post is to be believed he has a point about overclocking if you're going crazy with it. It isn't something that I'd avoid though, but rather something I'd keep an eye on by means of a plug-in meter.

Makes me glad that I bought the 6950 though, as the main reason I was considering the 480 over it was the overclocking and my CX500 probably really is only 500W (34A single 12V rail).

el Kuarlos · 31 Jan 2011 at 00:02

My opinion is it will probably work, but I myself wouldnt do it.

Some delicious irony coming from the 'its a branded psu and therefore it ll handle it' statements.

It is going to be close to the limit and yes corsair make nice psus but if you game a lot and have an overclocked cpu, given the amount of power you have spare, it would only take a small variance in either the psu, your cpu or the gpu to cause potential problems.

No one will ever argue a branded psu is necessary; why is is necessary; because YOU WANT TO PLAY IT SAFE.

Going against reccommended psu capacity?

That would not be playing it safe.

[TW]Fox · 31 Jan 2011 at 00:03

I thought your house caught fire if you overclocked it anyway?

[TW]Fox · 31 Jan 2011 at 00:05

el Kuarlos said:
My opinion is it will probably work, but I myself wouldnt do it.

It is going to be close to the limit and yes corsair make nice psu's but if you game a lot and have an overclocked cpu, given the amount of power you have spare, it would only take a small variance in either the psu, your cpu or the gpu to cause potential problems.

No one will ever argue a branded psu is necessary; why is is necessary; because YOU WANT TO PLAY IT SAFE.

Going against reccommended psu capacity?

That would not be playing it safe.

So you recommend what, we spend 130 quid plus so we can 'play it safe'?

Mr Krugga · 31 Jan 2011 at 00:06

Bull****, Corsair HX520W will comfortably run a mildly overclocked Core i7 with a mildly overclocked GTX 480 just fine.

The PSU outputs 480W on the 12V rails safely as that's what it's rated for and the GTX480 at stock paired with an i7 920 @ 3.33GHz consume just around 400W under Furmark.

As long as you run it safely (e.g. no heavy load in OCCT/Furmark, that are pointless anyway), you'll be just fine.

Rroff runs 2xGTX470s on a 700W OCZ PSU iirc.

BTW Fox, you can have a decent modular CoolerMaster Silent Pro 850W that is rated at 85% efficiency for just below £100. Corsair is not the only PSU 'brand' in the world.

james.miller · 31 Jan 2011 at 00:06

[TW]Fox;18352665 said:
So you recommend what, we spend 130 quid plus so we can 'play it safe'?

i didnt realise selling a hx520 and buying something better amounted to spending 130 quid on a psu and no, to answer a point you tried to make previously, nobody has suggest the op just throw his hx520 'in the bin'.

MikeHiow · 31 Jan 2011 at 00:07

Nah, £70 on a TX650 would be fine. 52A on a single 12V rail

Andrei23 · 31 Jan 2011 at 00:07

where are you getting £130 from?

http://www.overclockers.co.uk/showproduct.php?prodid=CA-008-CS&tool=5

MikeHunt79 · 31 Jan 2011 at 00:14

500w or so should be fine, remember you'll rarely pull more than 300w unless you're stress testing

I'd say a 600w smps would be ideal...

el Kuarlos · 31 Jan 2011 at 00:17

So you recommend what, we spend 130 quid plus so we can 'play it safe'?

Even if it cost a million quid it does not change the fact that it will be taking the psu very close to its limit and doing that over a sustained period may cause issues. It is also going against nvidia reccommendations by a significant amount.

As I said I myself would not do it. The anandtech site says 420 watts in crysis with a Intel Core i7-920 @ 3.33GHz. If something in the OPs rig uses fifty watts more then there is not enough slack for me.

Mr Krugga · 31 Jan 2011 at 00:19

el Kuarlos said:
Even if it cost a million quid it does not change the fact that it will be taking the psu very close to its limit and doing that over a sustained period may cause issues. It is also going against nvidia reccommendations by a significant amount.

As I said I myself would not do it.

That's an opinion not a fact.