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Is this psu enough to run these cards?

I am going to buy a new computer and i selected rc335 cooler master casing.. Here ara power supply details it has..

Thermal Master 420W Power Supply
+12V: 16A/ +5V: 30A/ +3.3V:
30A/ -5V: .5A/ -12V: .5A/ +5Vsb: 2A
1 x Main connector (20+4Pin)
1 x 12V(P4)
4 x Peripheral
2 x SATA
1 x Floppy

Here are the GPUs in my mind to buy.. One of these..

GTS450 / HD6670 /GTX550ti / GTX460 ( i am not sure what would i buy because of budget )

1. Can i run GTS450/HD6670/GTX550ti/GTX460 with the psu i mentioned above?

2. If i cant what kind of psu should i buy?

3 does my psu have a 6 pin PCI Express connector?
10 answers Last reply Best Answer
More about cards
  1. i know for sure it would run a 6670, but it dosent have PCI-E power cables, but you can get a converter which takes 2 molex connectors and turns it into 1 pci-e 6 pin
  2. nna2 said:
    i know for sure it would run a 6670, but it dosent have PCI-E power cables, but you can get a converter which takes 2 molex connectors and turns it into 1 pci-e 6 pin


    If i got a converter can i run GTS450 at least? :(
  3. you cannot run gts450, gtx 460, 550t on this system
    not enough amphere in 12v rail, need 17amps by 450 and a 100w cpu will require 9amps, equals 26 amphere

    so to run 450 you will need a new psu
  4. Best answer
    if you have a cpu with a tdp of about 100w then hd6670 is also at risk with that psu

    1.your 420w psu is not enough, you can only run a 6670 of those with some risk

    2. You will nee 1 psu with 500-600w good quality 80+ with 30-35 amps or more at 12v rail (combined)for gtx550ti

    3. Since your cpu is not enough (provides only 200w at 12v rail) so you can run 6670 at risk, so their seems not need for an adapter
  5. truegenius said:
    you cannot run gts450, gtx 460, 550t on this system
    not enough amphere in 12v rail, need 17amps by 450 and a 100w cpu will require 9amps, equals 26 amphere

    so to run 450 you will need a new psu


    I can afford for these..

    http://axle3d.en.alibaba.com/product/118761713-103191464/AXLE_400W_Typhoon_Power_Supply.html

    http://axle3d.en.alibaba.com/product/118761712-103191464/AXLE_500W_Twister_Power_Supply.html

    Difference is 10US dollars in my country. :D What should i buy?
  6. of those
    2nd one (500w) with a combined amperage of 32a (min 30A) is nice, it can run upto a combination of cpu+gpu upto 350w (i.e, if cpu is of 100w, then you can add a card of upto 250w, but no overclocking), and it seems that 550ti i just in the limit i.e, 250w

    do you want to overclock, and which cpu you have ?
  7. I am going buy a core i5 2400 3.1Ghz.. and not going to overclock GPU,CPU both.. That means i can run 550ti with 500w?
  8. surelly you can
    you are good to go
  9. Thank you very much all of you..
  10. Best answer selected by lakshitharxx.
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