Radeon R350 NH Dramatic performance drop

English Hardware
1

Hi,

I’m wondering if anybody could explain this phenomenon to me.

I have just had a box stop on me, probably power supply failure. It was running with an AMD 2GHz cpu, 32 bit, 2GB memory. The Radeon card was using the x-org “radeon” driver and giving upper 3000 to lower 4000 fps according to glxgears.

I have transfered both the radeon card and the hard disc from the dead box and loaded them onto a different one. The new one is running with an intel pentium 4 running at 1.7GHz, 32 bit, 1GB of memory. On this box glxgears reports only upper 600 to lower 700 fps.

OK. It’s a slightly less powerful cpu but by only 300 MHz. “top” shows glxgears using 72% of the cpu and the cpu shows that it’s loaded at 60%. There is still free real memory and the usage figures for it do not change during the running of glxgears. I am really puzzled as to why there is a fivefold plus drop off in performance.

I mean, the software etc is the same as on the old box - it’s using the same disc after all. I can only think that there is something else that is getting in the way but what?

2

Hello, I wonder if anybody could explain this phenomenon to me.

I had a box die on me (power supply failure). It had an AMD cpu running at 2GHz, 2GB memory. The Radeon card was using the x-org “radeon” driver. glxgears reported fps rates in the upper 3000 to lower 4000 range.

I removed both the R350 and the disc from the dead box and loaded them onto another one. This is running a pentium p4 cpu at 1.7GHz and 1GB memory.

On this box, glxgears reports frame rates of 700 - 750 fps.

Now, I know that it’s a less powerful cpu but by only 300 MHz, all software etc is the same as on the AMD box - it’s the same disc running the system. There is clearly something about the intel box that is causing this fivefold plus drop in performance but what?

Anybody got any clues?

Cheers - AK

3

Just upgraded to 11.3 and now the performance is sown to 200 odd FPS.