I am always looking at potential upgrades and lining up builds for others. I have never had to do SLI/Crossfire yet, but just wanted to see if there was any "good practice" or "rule of thumb" tips.
For the sake of example:
The R9 290X needs a 750W minimum PSU by itself (I am aware this should be overshot by 50-100W to have overhead for the rest of the build). So for one card I would get a 850W PSU rated 80 Plus Bronze or better. What would 2 cards require? How about 3 or 4?
Interesting side note, both the 280X and 290X require a 750W PSU. Would their Crossfire requirements be the same in this case?
The GTX 970 needs a 500W PSU by itself, so I would get a 600W 80 Plus Bronze rated or better PSU. What about running 2, 3, or 4 of these cards together?
Is there general rule of thumb, like increases by X percent for each card added, or add another 100W for each additional card?
Thanks in advance!