so today i was about to order a 660ti and i thought i better check my psu, i was thinking oh it will be ok this pc cost £800 from pc world (LOL! worst idea ever but then i was forced to buy from there) expecting to have the bare minimum of a 500w psu. now i opened it and found these figures... i am not sure what they mean so if someone could just say if it will run a 660ti or not that would be great, if it doesn't run it then i have to downgrade to a 660 SC and get a new psu with it
Channel well technology
+5vsb - don't know if there was meant to be another number i might have forgot to put it down
If i have to get a new power supply these 2 are the 1s i have been looking at
They list a minimum 450W PSU because some PSUs are underpowered on the 12V rail. They want to cover most situations with this. Your PSU has enough on the 12V rails. Based on the info you've provided, each 12V rail can handle a max of 12Vx17A=204W each with a total of 405W combined (possibly?). If you could show a picture of the label on the PSU or provide a model number, we can better evaluate the situation.
It won't be 405W combined as that is the practical max of the PSU overall. Rather, the PSU can put up to 204W on either rail but its total power output must remain at or below the nominal 405W. As the system will draw power from the other rails at all times you will never be able to achieve 17A on each 12V rail simultaneously. You couldn't safely do this even if there were no other power draw- as that's 408W - 3W more than it apparently allows!
Essentially we're looking at a reasonable front-end design (where the 3.3V, 5V, 12V are regulated) with an underpowered back-end (where mains is brought down to useable DC) to feed it.
OP, consider changing your PSU. Split rails (12v1, 12v2 etc) are horrible things anyway, they are impractical more often than not. Get something like a Corsair CX430W or a CX500W V2. Cheap, good quality, single large 12V rail for no-nonsense juicing supply.
Split rails are FINE! In fact, when properly current-limited (most are), they are safer than a single more powerful rail. Just keep in mind that they won't be additive; for example, you'll have 24A total on +12V, with each rail limited to perhaps 16A-18A; you can load one rail up to 18A or so, but the total still can't exceed 24A. The idea of power being "trapped" on an under-utilized rail is thus a myth.
The Corsair V2 "Builder" units are so-so PSUs; made by CWT, not Seasonic, using some inferior Samxon capacitors known for early failure. Look for PSUs built by Seasonic (their own, XFX, some Antec), FSP (their own, some Antec), Enermax/LEPA (their own), or Superflower (new Rosewill and new Kingwin).
Furthermore, Coolermaster PSUs are generally near-junk; in particular the GX-650 was summarized by HardOCP as a "polished turd in a box."
Just to update you all, first of all thanks for the replys, my card is already here (660 Superclocked in the end) power supply isn't expected to be here till tuesday. Would it damage the computer if i tried the 660 with my current system?
Something i should had added to earlier posts but forgot then when i did try to edit at one point it said i couldn't, is the rest of my specs if it affects anything which are
It's all working at the moment, no problems so far, had a quick go on GTA4. Really not sure if i do still need a new power supply though as it still hasn't been dispatched i am thinking about cancelling to be honest
But yeah, thanks for the replys guys been a great help!