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buying psu today! which one??

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#1
i urgently need a psu, and today i get a bit of money so can pop to pcworld or maplin and buy one.

i was thinking the corsair gs800 or cx750(m). my card requires 12vrail recommended 42 amp..
heres the pages with which i can buy straight away...

http://www.pcworld.co.uk/gbuk/power-supplies/718_7057_70061_xx_xx/xx-criteria.html

http://www.maplin.co.uk/buy-computing/pc-power-supplies-and-ups/pc-power-supplies

(maplin are hardly ever in stock tho)

edit; what is xfx like? its not recommended by amd?

help is needed thanks
 
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#2
XFX is a very good brand! Not sure why AMD would not recommend it?

For 42A on 12V rail, at least a 650W PSU should be enough. But allowing safety margin, say 750W minimum.

First preference is Seasonic (but not available at the stores listed), then XFX, then Corsair, then OCZ.

Depends on your budget which specific model is more appropriate.

In stock recommendations:

XFX 750W XXX Edition
Corsair CX750M
Corsair GS800
OCZ ZS750W
 
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#3
i would recommend Single Rail PSU :rockout:
 
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#4
The 750 if you intend on going Crossfire in the future.
Yes XFX is considered having reputable PSUs.

Can't remember the reasoning behin a single rail PSU over a multi rail one.
Might be something about uneven loading.
Multi rail PSUs were big back around the Intel P4/Athlon 939 skt days.
 
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#5
The 750 if you intend on going Crossfire in the future.
Yes XFX is considered having reputable PSUs.

Can't remember the reasoning behin a single rail PSU over a multi rail one.
Might be something about uneven loading.
Multi rail PSUs were big back around the Intel P4/Athlon 939 skt days.
less amps to play with per rail bro..

i prefer a single heavy duty rail so im not blowing rails.

i.e 60A psu as quad rail , 15A a rail.. (weak)
 

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#6
Are you anywhere near www.novatech.co.uk ? Much better shop with great customer service and more likely to have a quality brand in stock.

Also, go for a single rail PSU if you can. Decent brands are Seasonic, Corsair and Enermax among others.

So, did your old PSU blow up that's making this purchase so urgent?
 
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#7
The Corsair Gaming Series GS800

Power supply is the ideal price-performance solution for building or upgrading a Gaming PC. A single +12V rail provides up to 65A of reliable, continuous power for multi-core gaming PCs with multiple graphics cards.

Looks Good to me....(single rail)
 
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#8
Can't remember the reasoning behin a single rail PSU over a multi rail one.
Might be something about uneven loading.
Multi rail PSUs were big back around the Intel P4/Athlon 939 skt days.
It has everything to do with loading. With multi-rail PSUs, you have to make sure you evenly distribute the load over the different rails so you don't over load a rail. With a single rail PSU, this is not a issue as all connections have access to the full power potential of the PSU.
 
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#9
From the master itself long time ago:
The bottom line is, for 99% of the folks out there single vs. multiple +12V rails is a NON ISSUE.
 
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#10
Thread full of single vs multi fail.

Putting that aside, the fact that a GPU manufacturer recommends "42A on 12V" refers to a typical whole system requirement. There is no single GPU that needs 504W (42*12) all by itself.
Heavily OC'd FX8150 + heavy OC HD7950 = about 500W in extreme cases. Real-world application would require less than that.

As for a recommendation, the only real choice (of the in-stock stuff), would be this XFX. There's a Seasonic M12D inside, and it's simply beautiful (electrical performance-wise).
 
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#11
XFX or Corsair, both seem to be good buys.

I'm running a 5+ year old Corsair PSU and it's still working fine. This thing is a tank.
 

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#12
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#13
So, did your old PSU blow up that's making this purchase so urgent?
its hissing so no demanding tasks lol also I been busy all day so didn't get chance.

plans are to go xfire so 750 in watts and single rail! the xfx looks good as well so I don't know why its not on amds page if people here say its good. well I now have the cash ready and waiting about 90ish to spare. if I get time ill pop in pcworld or maplin and pick up either the xfx or corsair gs800. thanks guys
 
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#14
Might want to stay away from Corsairs GS series, if I remember right they are considered to be some of Corsair's lowest quality units.
 
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#16
how about corsair cx? or even xfx? really I need to get it asap
The Corsair cx/hx/ax series are all good quality units and you can't really go wrong with them. As for xfx those I have no experience with.
 
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#17
A few words from the dedicated pros about my suggestion: HS, jG, [H].
As for the others, crmaris has taken a look at them, GS800 and ZS750 right here at TPU, and the older CX750 at TheLab.gr. The newer CX750M *should* be the same design, just with a modular board added.

The XFX is in a class of it's own.
 

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#19
its hissing so no demanding tasks lol also I been busy all day so didn't get chance.

plans are to go xfire so 750 in watts and single rail! the xfx looks good as well so I don't know why its not on amds page if people here say its good. well I now have the cash ready and waiting about 90ish to spare. if I get time ill pop in pcworld or maplin and pick up either the xfx or corsair gs800. thanks guys
Hissing?! :eek: I'd switch off your PC immediately and unplug it from the wall in case it goes with a bang. I'm not exaggerating, they really can do that.

Personally, I say that you should get an overspecced PSU from a quality brand as that way, you'll never have to worry about your PSU. I've had my Corsair HX850W for years which has never been heavily stressed and works very well indeed. Also, I can plug in what hell I like without worrying if I'm going to overstress it.
 
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#20
I was part joking when I said it was hissing, only at full load! ive taken all my gfx card and that out because im still waiting on buying a psu!

im in a dilemma; decided on watts, I want modular and brand (corsair or xfx).

but the problem is now I can buy the gs800 or even the ocz750 tomorrow from store (which is needed to say the least), or I can wait pay more for the xfx 750 or wait and order the cx750m??
 
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#21
XFX 750W XXX Edition <- Single +12V rail; high quality components; modular
Corsair CX750M <- Single +12V rail; component quality unknown; modular
Corsair GS800 <- Single +12V rail; overall, above average quality components; non-modular
OCZ ZS750W <- Single +12V rail; ~ high quality components; non-modular

The XFX PSU is the preferred choice, if it can be afforded.
 
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#22
If you could wait for ~9 days, this is unbeatable, especially for that asking price...
 
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#23
D1nky - Really? Again? We have been here before mate and that CX750m will be perfectly adequate, its a great price for what you previously stated your budget is and you have the Corsair warranty to back you up. Patience, whats a few days mate?

Just go for it and when you get it, enjoy!!
 
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#24
i have both AX850 and HX620 and they are both top notch after years of abuse :p
the quality is amazing the AX850 has 7 years of warranty to boot, lets hope corsair will extend that to 10 years just for the kick of it ;P
 
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#25
D1nky - Really? Again? We have been here before mate and that CX750m will be perfectly adequate, its a great price for what you previously stated your budget is and you have the Corsair warranty to back you up. Patience, whats a few days mate?

Just go for it and when you get it, enjoy!!
I know I know lol! im actually planning on upgrading mobo and cpu.....I done someones garden out so got an extra few hundred to spare and well im one step closer to xfire ;) Friday itll be all ordered, plus ill sell my old parts to pay for new card