I bought a 2nd hand GeCube Radeon X1950 Pro AGP card from fleabay on Friday (from a powerseller). I received it Saturday. It looks brand new apart from a tiny bit of dust on the fan blades. I installed it into my system and connected 2 molex connectors from two seperate lines from my PSU. Fired it up and was shocked to see a glitchy bios full of artifacts, but I left it on and let it boot up. Resolution was reset to 640 x 480 so it was hard to see especially with a screen full of artifacts (short horizontal lines mostly all over the screen) but I had already prepared the Radeon drivers and I could see well enough to load them up so I did that after installing them I rebooted. Upon rebooting, the screen was free of artifacts in the BIOS and in Windows so all was well.
So I booted up Trackmania Nations Forever and put all settings on high. Loaded the game and started racing away. Fantastic framerates, beautiful detail... then after approx 15 mins the system randomly froze mid race. The sound that was playing started looping then the screen was black and the "no signal" message appeared on screen. I had to hard reboot.
Now after about 24 hours of extensive testing, I've found that this happens in pretty much every single game I play and the crashing is completely random. It might be 15 seconds into the game and other times it might go for as long as an hour (even in the same game). I've tried different resolutions, detail levels, underclocking the card with ATI Tool, upping the voltage to the AGP slot, different drivers (Omega ones currently installed)... can't seem to shift the problem.
I've read in other forums that it might be due my PSU not being up to the job. I have a 400W Enermax Liberty which was supposed to be able to hand SLI Gfx card setups... I don't know what ampage the rails have but the manual for the X1950 Pro states that it recommends a 450W PSU with a minimum of 30A supplied to the card... Would my PSU being underpowered lead to this sort of instability?
Or maybe the card is overheating? The fan is certainly very loud. However, I've underclocked it by as much as 300Mhz in ATI Tool and I've run the artifact scanner for upto 30mins with no results. It's worth noting that I've also not seen any signs of glitches in games at all even during a crash before I have to reboot it.
I'm loath to send the card back as I'm pleased as punch with the performance and don't want to be without a card for ages... especially if it can be fixed by a PSU upgrade. Your thoughts? (will be much appreciated)