We this is going to be my rant 30 about PSU's.
So I just got my EVGA 750B PSU and it’s great, I love the thing but once I got a 2nd video card and tried to do sli, it didn't work out so well. I'm not saying it’s the PSU that's the problem because right now I'm sending my cards back to EVGA in the hope that will help, but the problem being is when I took a look at how the rails are layed out and i saw 4 12V rails with 20 amps each. This is a huge problem in the PSU market, you go buy a 750w PSU to only find out it has a bunch of rails that may or may not be to weak for your GPU. My GTX 660's need 24 amps on the 12V each but this PSU only has 20 per rail.
So if we are selling PSU's that are 750w but they can barely handle a modern day GPU we have a huge problem. So after seeing this on my PSU I went to NCIX.com and look at the other 750w PSU for sale and saw a lot of the same thing from 6 16 amp rails to 3 28 amp rails, it was just unbelievable to see what these company's are doing to try to make a quick buck off unaware customers.
So this is where we are at, these trusted company's just claiming that these are great PSU's and they can give out 750w, well sure it cone if you can ever find a good GPU that uses 16 amps.
To sum this up, we have a big problem in this market that needs to be fixed or its just going to get worse and worse. And these company's should as always stop treating their customers as a guarantee.
Also if Logan or Wendell would like to share their opinions about this topic that would be great.
I don't really see this as a problem to be honest. I don't believe they should be marketed as SLI ready because yes maybe they could SLI lower powered cards but not higher ones so that is an issue. Really though if you are going SLI I would think you'd have the sense to do this research.
I always will check before I buy a part that it can provide the wattage and amperage I need. Wattage doesn't tell you shit even if it is from a reputable brand. I also always go with a PSU with a single 12V rail. I'm sure that PSU is great and I'm sure it can put out 750W, just not the amperage you need.
Here: http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007657%20600479296%20600026254&IsNodeId=1&name=Single
Newegg has over 50 PSUs available between 700-800W all with single 12V rails.
There are single and multi rail PSUs available and a majority of multi rail PSUs these days are fairly good and will usually have enough amperage per rail. I'm sorry you got burned because you didn't look it up but I really don't see that as the manufacturer's or retailer's fault. They aren't hiding the amperage of the PSUs or lying about their output. All that information is clearly available, most of the time, so I put the blame squarely on the consumer there.
The lesson here is: don't ever believe the marketing.
No i personally didn't get burnt (as far as i know so far) but this just points out a huge hole in the market, I got a EVGA 750w psu i would hope that it is enough to run a mid end card that EVGA MADE THEMSELVES(in number speak it works with a single card)
Frequently when I make assumptions with technology when putting things together, I get burnt. It happens to all of us. That EVGA PSU may seem useless to you but it will work fine for someone building a disk array.
When buying a PSU people should at minimum read the label where the rails and capacities will be shown. If you're building a computer it's not rocket science but it helps a great deal to know what you're doing. Most people who build PCs get by on luck, and by using the exact products that others have used successfully.
The total wattage is not what you want to be basing your buying decision on.
This is why I'm never happy when people recommend these multiple rail PSUs. It is often hard to balance the various components on each rail, and leads to problems like these.