600W Overkill?

[Shedlife]

Would 600W be about right for this setup?

Phenom II 720 BE @ 3.7GHz
Samsung F1 HDD 250GB
x2 4770's CFX
DVD Drive
4 GB DDR2 (2x2GB)

Due to a tight budget the cheaper the PSU the better (PSU needs to be branded though) any recommendations?

[scaryjim]

It'd probably be slight overkill. If you're looking at a tight budget I'd haul back to ~ 450W which will let you get a better brand and should still comfortably power that lot. Don't forget that your 2 4770s only match the peak power draw of a single 4870!! The only real issue you might find is getting a 450W with 2 PCIe connectors, but you can buy adapters from 2 molex -> 1 6pin PCIe...

[Shedlife]

hmm using this

http://extreme.outervision.com/PSUEngine

it says I'd use 517W at full load, and they don't have a 4770, so I just used a 4870

[Hicks12]

Well i would get something around 500-600. Whats your budget? Also do you mind about noise generated?

[aidanjt]

hmm using this

http://extreme.outervision.com/PSUEngine

it says I'd use 517W at full load, and they don't have a 4770, so I just used a 4870

That 'calculator' is always off by default. 400W or so will power the rig no problem with room to spare. 600W is overkill... It depends on your budget, and if you ever want to add power guzzling parts to your system in the future.

[CAT-THE-FIFTH]

I would look at getting a modular HX520W or Enermax MODU82+ as these are solid PSUs.

[Shedlife]

Well i would get something around 500-600. Whats your budget? Also do you mind about noise generated?

The budgets £50 MAX less would be preferred, and the quieter the better.

Well I find it most satisfying when you have the elegant minimum to get awesome performance, and say a 1KW PSU would just be the anti-christ for me

That 'calculator' is always off by default. 400W or so will power the rig no problem with room to spare. 600W is overkill... It depends on your budget, and if you ever want to add power guzzling parts to your system in the future.

So would you say a nice 400W OCZ Modular PSU would be able to give enough power to both the cards?

[dangel]

and say a 1KW PSU would just be the anti-christ for me

...oh I dunno, mine's quite sweet actually

[dfour]

I say overkill is good as it means should you wish to upgrade later you dont need to buy a new PSU as well as any other components.

and say a 1KW PSU would just be the anti-christ for me

I would have one if I could afford it regardless if I needed it at that point in time

[Hicks12]

Xclio PSU are great, made by CWT and are reliable along with being cheap iirc i got my 700w for £60. Scan dont seem to be selling the lower end at the moment so maybe have a look at FSB 700w? might be on today only for £30 as normal.

[Will404]

hmm using this

http://extreme.outervision.com/PSUEngine

it says I'd use 517W at full load, and they don't have a 4770, so I just used a 4870

using the calculator, with your system, and a 4830 in crossfire, mild overclocking, but no other cards, it said 396W, as the 4830 is closer power draw than the 4870, (AFANK that 4830 has more power draw), so 450 should be fine

[scaryjim]

I say overkill is good...

Except that PSUs are at their *least* efficient when put under very low draws: so a 1000W PSU powering a 300W-drawing system is probably pulling nearer 500W at the mains, where a 400W PSU powering the same system will pull ~ 350W.

A little headroom for more components is fine, but since you're most likely to add more memory or another hard drive which won't pull much power you don't need much headroom - maybe 20% / 100W. If you manage to upgrade your computer to such an extent that it's drawing more than double its original power consumption, you're doing something wrong...

[scaryjim]

If £50 is the absolute top you probably want an Enermax Pro82. If you can stretch the budget a little further, the Enermax Modu82 CAT suggested is £55 and will help keep your wires nice and neat

[Shedlife]

using the calculator, with your system, and a 4830 in crossfire, mild overclocking, but no other cards, it said 396W, as the 4830 is closer power draw than the 4870, (AFANK that 4830 has more power draw), so 450 should be fine

I've gotta say, you are BANG on correct and WOW the power consumption from a mid-high end system can be provided on 450W :

[Will404]

If £50 is the absolute top you probably want an Enermax Pro82. If you can stretch the budget a little further, the Enermax Modu82 CAT suggested is £55 and will help keep your wires nice and neat

+1,
or http://www.scan.co.uk/Products/450W-...-year-Warranty from scan with free shipping

Edit: Free shipping setup link: http://forums.hexus.net/scan-care-he...tup-guide.html

[Shedlife]

Would I just need a molex - PCI-e adaptor for the second 4770 then?