I like it, but I made this mistake with my first wallpaper, you didn't really blend it together. For example, the background, one of the NVidia Surround Wallpapers I believe, is nice. However, then you just plopped a GPU and the claw on it. I can understand the GPU sort of, but the claw is just given a little shadow and plopped in place. Try to experiment with the blending modes, possibly "subtract" on Photoshop would look nice. That would make it look like it was imprinted into the NVidia wallpaper, not just stuck on there.
You did better with the logos, but adding logos like that is very complicated. You can't just add a logo on top of a complicated texture like that and just add some outer glow. You need to ether feather the edges, which would make it look a little better, or just skip the logo. They were really meant for a more "Plain" background.
I really like the text though, that looks very nice, I have no suggestions for that.
EDIT: Ok I just saw your second, you can't just delete parts of the GPU. The GPU has to be recognized as a whole, not a thing that has holes in it (pun intended - sorry). You have to either keep it as a whole, or blend the whole thing at once, like I was saying with the claw.
Personally, I wouldn't use that background, because it wasn't meant to have things put on top of it. It's stand-alone. I've told this to another member, the background is supposed to reinforce the design, not be the design. (There are certain circumstances, but that is more complicated)
I'm not trying to sound like a jerk, just pointing out what I think could be changed. The first comment I got on my first wallpaper was, "Honestly, it's terrible." Yes, I hated that guy for a while, but now I see that he basically started my wallpaper career. In fact, I'm gonna find him and send him a PM of gratitude right now