Here's an interesting question I hope someone can shed some light on-
I have 2 boxes running Libranet 2.8.1 (Debian-based distro); same kernel (2.4.26); 1 is an Athlon 2000+ with 512 MB RAM and a PNY GeForce 5200 video card, the other is a Sempron 3100+ with 1 GB RAM & a PNY GeForce 550 video card. Both are running with dual monitors with twinview (both the video cards have 2 x VGA), and both are running the same nVidia drivers (6111, tho' I've tried 6629 & 5336 as well).
You'd think the Sempron box would easily beat the other in framerates, but no. GLXGears gives nearly 3000 fps on the Athlon box, and only about 750 fps on the Sempron.
I tried UT2k3 on the Sempron (in case it was just a glitch with GLXGears) but it's almost unplayable while on the Athlon it's smooth as silk.
I've updated the BIOS, reinstalled the drivers, messed with the XF86Config-4, but nothing seems to help.
It's not crucial as the Sempron is my work box (mostly DTP with OOo), so I shouldn't really be playing games on it, but it just pisses me off that it should smoke the Athlon & doesn't.
The 5500 card is just a slightly updated version of the 5200, so that really shouldn't make a difference- and I can't think of anything else to try.
Does anyone have any ideas what I'm doing wrong??? This is keeping me awake at nights!