power draw
- Thread starter garih
- Start date
Fez
Moderator
depends on the energy effieciency of the psu, does it have a certification e.g. gold, silver, bronze, platinum
but generally your pc will never pull the max unless u have enough to do so.
S_I_N
New member
the power consumption will be the same. It will only go up as you increase what your doing on it or add more components.
Also a 750watt may not (or may) be enough for sli without overloading it. this is why I just upgraded to an 850 watter so I can sli later if I decide. Things to look at are the amps on the 12volt rail. as well as the power req's for the cards in question. Keep this simple thing in mind when upgrading each psi-e slot pulls 75watts each 6pin pci-e connector pulls 75watts each 8 pin pci-e connector pulls 150 watts now these numbers are important but amps are also. SO say you have a gpu with 2 6pin pci-e plug thats 225 watts already add another card thats 450 just for ur gpu's at this point ur already over 50% of ur psu's watts now add in the rest of ur components say they all together draw 125 watts ur now at 575 watts gaining real fast on ur 750 and now ur at 75% ( round about) of ur 750 most psus are 80% certified. basically this means they run the best when at 80% or under (power is cleaner (less ripples) and stable) now add in overclocking which can add more watts draw. you've now gone beyond the 80% efficiency mark and ur oc's become unstable you start getting bsod's because this driver or that component failed due to not enough power. so my suggestion is dont sli on a 750 watter (unless ur talking low end cards) when the time comes just get a single more powerful card.
S_I_N
New member
The 560ti in sli would be close I cant reply on the 7870 but assuming its in the 560ti range would be close as well. What 750 watter did ya buy??? This one?? http://www.newegg.com/Product/Product.aspx?Item=N82E16817207003 its 62 amps on the 12volt rail might be enough. but imho you'd be better off getting say a 570 (dont know AMD equiv)
yes, that is the one i have bought. and the amd equivelent in cost is slap bang between 6950 and 6970, but im not buying gpu till 7k released, just in case.
not doing bad tho, today i have spent £500. that includes, shinobi window, nhd14, asrock z68 extreme3 gen3 mobo, 2500k, xfx 750watt psu, and kingston genesis 1600mhz 8gb.
only the gpu to go and i should have a pretty decent rig for under £700 just gonna use 1 of me old spares till then, what ya reckon, 4650 or 8600gts
