I just want to know if the 4850 or 4870 will fit in an Antec Sonata III case ?

maybe the GTX280 and 260 ?

I hope someone knows it :S

thanks in advance

It should be able to fit, might be a tight squeeze with the extra fan in the front.

It probably won't fit with the HDD cage fan installed but without it it should fit fine, otherwise I better start looking into a new case.

I don't know how the 4850 compares to a 8800 gts, but the sonata iii can hold a gts, even with the optional front fan installed
last pic on this page

http://www.hardwarecanucks.com/for [...] iew-6.html

Get the 4870, the 4850 which is single slot will heat your case up very quickly. The Sonata III does not have sufficient exhaust capacity for a high powered single slot GFX card.

It fits even with the optional front fan installed, but very tightly. I have it installed in my set-up. You may need to force the PCI-E power cables just a little bit, but it definitely works. I also installed an accelero with another 120mm fan strapped to it.

The GTX280 and 260 seem to be a little long, so you may not be able to install the front fan.

On a side note, my HD4850 is running at 35 degrees idle with the accelero and my rear exhaust fan is on its lowest setting right now.

Air flow shouldn't be a problem with the front fan installed.