Quadro Fx 4800, very slow

[racoonart]

Hi,
I installed the new RT just a couple of hours ago and I'm fairly new to all this RT stuff.
I noticed that RT on CPU is nearly 2.5 times faster than on GPU .
When rendering , my CPU(s) are doing about 650,000 kpath (2 quadcore-xeons) whereas my QuadroFx 4800 is just getting around 250,000 kpath. So what am I doing wrong here?

Thanks for any help.

[Alan Iglesias]

If everything is operating OK, you possibly aren't doing anything wrong. The 4800 is non-fermi card (fermi cards have the best OpenCL performance currently), and there are only 192 cores on that card (compare to 480 on the GTX480 and 336 on the GTX460). For all I know, the core clock is slower as well. Also, you are comparing it's performance to some fairly stiff competition (even in a CPU solution) in those dual quads you're running, especially if they are running at over 3Ghz.

Just my best guess,

-Alan