5750 on a 420W psu

Hi, I'm from new zealand and im looking at a PC, and want to ask the seller to upgrade the graphics card to an hd5750.

http://www.trademe.co.nz/Computers/Desktops/No-monitor/auction-322369555.htm

^Those are the specs:

4gb DDr3 1333 ram
5750gfx (upgrading from gt240) < apparently 86W at load.
AMD phenom II 955. (Apparently 216W at load).

I wanna make sure that it obviously doesn't blow up, and im unsure what a realistic 'load' is possibly under todays games, although i play nothing demanding at the moment i may in the future.

I've asked the seller how many amps it is, waiting for response (Answer is displayed at bottom of page).

currently system is @ $810 (He offered it for that maybe lower) with a GT240 512mb / ddr3. I think its worth upgrading to 5750.
If it can run on the same 420W psu it it'll cost me total $899 for the 5750
5750 with 550W psu will cost me $959 and GTS 250 will cost me $929 with 550W psu.
Note NZD, pc stuff is a lil more expensive here, and the exchange rate is $75US = $100NZ
16 answers Last reply
More about 5750 420w
  1. That PSU is rated 420watt peak 350 watt average and is of low quality. It probably would run a HD5750 but having a marginal PSU leaves the change that it will go out and take other things with it. You would be better of with a quality around 400watt PSU from Corsair or Antec to name a couple.
  2. lol. 12ghz cpu. wtf? its a typical generic pc, lousy power supply, and a trial os. build your own!
  3. In New Zealand the suppliers know that it ain't 3.2x4 Ghz but some casual listers don't and as consumer's may not know, they may buy a '6.2Ghz' instead of a quad core cause the QC will have less than half the Ghz in their eyes.

    If I built my own, this is what would happen.

    ~ I've checked on pricespy which gives the cheapest price for each part.

    $220 for the 5750, 260 for the 5770.
    $230 for same processor. = total 450
    $120 for similiar ram = total 570
    $200 for a good case and PSU = total 770
    $ for hard drive, mother board, fans etc will surely lift it to above $1000.

    Currently he's selling the 5750 and same parts for 900 and I struggled to fit my graphics card cause apparently one of the slots was screwed, building a PC will surely try my parents >.>.

    I already have windows vista Ultimate 32 bit, may consider Windows 7 64bit, so trial OS works in my favour.

    Please keep the replies coming!
  4. rolli59 said:
    That PSU is rated 420watt peak 350 watt average and is of low quality. It probably would run a HD5750 but having a marginal PSU leaves the change that it will go out and take other things with it. You would be better of with a quality around 400watt PSU from Corsair or Antec to name a couple.


    So I would be better off buying the 550W PSU?
    That would run the GTS250 fine right?
  5. Yes a reasonable quality 550 will the GTS250 needs minimum of 24amps on the combined +12 volt rails.
  6. rolli59 said:
    Yes a reasonable quality 550 will the GTS250 needs minimum of 24amps on the combined +12 volt rails.

    Any ideas on the 5750 on the 420W?
    I' m more concerned about that at the moment to be honest since ill only think about the 250 if the 5750 cant go on the 420W PSU of i am told, low quality.
  7. It will probably run the HD5750 since it is a very power efficient card. Don't be surprised if you experience some instability though.
  8. rolli59 said:
    It will probably run the HD5750 since it is a very power efficient card. Don't be surprised if you experience some instability though.


    so i should buy the 550W PSU and perhaps jump to the 5770 for $1000 with the 955 @ 3.2 ghz
    or go with an acbel 510W PSU w/ 5750 and a 965 BE @ 3.4 Ghz? (For $1040)
  9. The HD5770 and 955 is the better option! 955 easily overclocks to the level of 965.
  10. acbel is hit-and-miss. do you know what brand the other 550wis?
  11. shovenose said:
    acbel is hit-and-miss. do you know what brand the other 550wis?

    well ive asked the seller that awaiting reply, but shouldnt a 550W even no brand, comfortably support the 5770 and 955?

    The seller claims his supplier said the 420W can run the system even with a 5770 so 5750 should be no probs, i need to make sure however. I'll update this thread as soon as i get the responses, but really, 5770 w/ 550 W PSU and a 955 Should be fine aye?
  12. bump!!!!!!!!!!!!!
  13. errrmmm...a diablotek "1050w" power supply was tested on a load tester. it died at 600w.
    also, look at this (some one figured out that that it was raidmax)
    http://www.corsair.com/cinema/movie.aspx?id=622747
  14. ^That makes me real happy.
    Guess Imma buy that 550W PsU atleast, maybe even the 650 W - , -
  15. Quote:
    CPU speed: 12 GHz



    Wtf???


    I want that computer if those clock speeds are real :lol:
  16. i have a better idea. buy the computer with the cheapest psu, then when you get it, swap it out for a unit you want. not some unknown generic crap. so im saying buy a corsair or something,
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