Originally Posted by Murlocke
Their efficiency ratings are based on like 60-70% load. They can handle peak load, but it's not really ideal. It also seems dumb to spend $2000 on GPUs and not be willing to spend the $30 difference on a bigger PSU. I avoid small PSUs, which is why I just went all the way and got a 1200W even though I don't need it. It's future proof and you'll never run into "is this powerful enough?". It saves money in the long run.
Pretty much agreed. General rule of thumb is don't "ride the line" so to speak when it comes to PSU's - when you're spending 2000$ on GPUs, I dont' see why anyone would skimp in any other respect. Fact is a 750W is awfully close to the limit and even if it does work (doubtful) you will have absolutely no room for overclocking whatsoever. Remember, overclocking increases power draw a TON - my lightning 680s have a total system draw of over 900W from the wall in furmark when I over volt them. At stock, it's not even close to that.
I'd consider 850W to be ideal for 2 titans, minimum.