I'm still a ssd virgin, if you find the box let me know for sure.

found 1 today was not really looking for it that might be why.
 
i designed a rack that fits 5 GTX750 Ti's (or any card under 180mm) in the base of the 900D
mixed use rig anyone. drop a nice card for gaming and have all them 750 ti's hashing
 
was looking at some of the Cuda 6.0 code and gains from it.
with about a 1/3rd rewrite of cudaminer (I'm think about doing it my self)
and pure Cuda 6 + direct-compute implied i can see 750 ti's hitting 600kh+ on Ltc
"maxwell" has a lot more in it for us (‡¿‡) i can see next gen Maxwell doing 50+% better then AMD and on less power
 
btw i tested a few of the simple changes and recompiled cudaminer and my avg is 453KH/s now
i have shared this with the Christian he thinks he can get a new ver out soon with the findings and a cuda patch (or people will need to install the SDK with it)
test rig 450~486 avg 453 using 48.2watts from 1X powered riser
only tested x86 cudaminer. will post more findings later
 

450 or more kh/s @ 50w ! 750 TI price is going to shoot up to $250 a piece.

techmasterjoe
btw i tested a few of the simple changes and recompiled cudaminer and my avg is 453KH/s now
i have shared this with the Christian he thinks he can get a new ver out soon with the findings and a cuda patch (or people will need to install the SDK with it)
test rig 450~486 avg 453 using 48.2watts from 1X powered riser
only tested x86 cudaminer. will post more findings later
 

If you would please post me a DL link via PM of the modded cudaminer for testing?
Was it also some mods done to Cuda 6.0? If so that too for DL.
Thanks

I think a made some progress. I'm 75% sure its the usb risers, I'll see on Monday or Tuesday when the unpowered ribbons get here.

For sure I will update as soon as they come in, on april 2nd. I am wanting to exchange on of my none OC editions r290x to newegg it doesn't like the magic 1500mhz number that most good cards like , my better cards are 940-970 (one OC one none OC)optimized by a noob and the other card gets 895 average, I bought it on the 5th of march so times ticking for the newegg exchange.

Well, this boards picky as hell with risers. I got all three cards recognized with 1 powered usb, 1 16x to 16x non powered and 1 1x to 16x non powered. I have 7 risers over 4 different styles so I'm glad I ordered extras.

That's weird that you had so many problems. I have one that's running 5 270xs off of a combination of powered and unpowered risers. Ran first time I turned it on in BAMT. Maybe I got lucky with my risers. Did you check the solder joints on all of your risers? They might not have been done correctly. That happened on a couple of mine, but were easy to fix.  

What AMD drivers have you tried?