Originally Posted by subtec
Not sure what all that means... 1U PSUs can't cut corners, since they need to run 24/7, often at high loads.
So 475w at the wall... and with, say, an 88% efficient PSU, that's 413w it needs to deliver. What CPU in the test system? They usually use 130w CPUs for reviews, and bear in mind a mini-ITX-based system tops out at 84w CPUs, due to the lack of socket 2011 motherboards.
Anyway, a bit OT here.
@NavDigitalStorm, will the production version be using a flexible PCIe riser as shown in the publicity photos?
PSU efficiency doesn't work like that...Efficiency is in relation to what you draw from the wall not the output to your system.
For example, if you use 300W, but pull 400W from the wall, then the efficiency is 300W/400W, or 75%.
So if you're using 500w, you realistically pull @625w from the wall.
It doesn't go down...
So if I'm using a card that peaks @ load at 475w...And the CPU is using 125w-200w...That 500w PSU goes bum...*smoke*
Again, ultimately, I can't control what people do with their cards but, using a 450w high card in a 500w system, is effectively cutting off the Titan's performance, at it's knees.
It doesn't mean you can't do it but, it's kind of pointless to have a Titan at that point because you've neutered it.
The entire point of this is that a Titan or 290x et al, in a form factor PC is actually a really big deal because it's never been done before. Alienware came close but, was voltage limited...So if DS moves forward with a 700w psu, you'd actually be able to use the Titan @ 100%...Which is a really really really big deal in the tech world.