This 5570 is a good deal at $50AR/FS: http://www.newegg.com/Product/Produc...82E16814102875. You'll save $20 out of pocket over the 5670, it's extremely compact, and it will be enough for your computer. Faster and cheaper than GT430, just under GT240: http://www.tomshardware.com/reviews/geforce-gt-430-gf108-fermi,2766-5.htmlSo it's a definite "no" for any cards with a tall fan/heatsink. That's really a bummer. I was attached to that Sapphire HD 5670. But thanks for the heads-up, DominionSeraph.
I'm not sure what I'll do now. I don't think I can stand my on-board graphics chip any more, so I still want a graphics card. I might go for a used card, or wait for a really good deal on a new card to come along. I can get the XFX HD 5670 for $65 now, but if that card would be limited by my computer, then maybe it would make more sense to wait for a cheaper deal on a less powerful card.
My dead 8600 isn't under warranty. I'll submit a support ticket and try to find out how much it would cost me to send it to XFX for repairs. If it costs too much, then I'll hunt down a couple new capacitors and have a friend of mine replace the blown ones on the card to see if that does the trick. If it does, then I might just go back to using my 8600.