Recently bought 2 HD3870X2s and having major problems
I am running mainly Vista but also Xp and Windows 7 (32 & 64) in 2 gb with a 1000 Watt Jeantech Absolute PSU
Regardless of OS, my systm will periodically shutdown (graphics go, radeon fan speeds up slightly and system requires reboot)
Event view shows "unexpected shutdown" but nothing helpful to diagnose
I had thought that PSU (previous 570 watt) may have been failing at peak load so replaced with the 1000 watt -sadly this has not helped.
I would be grateful for any pointers to the problem - especially good suggstions for diagnostic tools / techniques
I am not using dual Cross fire and getting the problems with both cards independently - one card is Powercolor PCS and the other is Sapphire - i am getting to the stage where the only really common component is the motherboard as I have even swapped the 2 gb ram
Getting desperate guys as the 2 HD3870X2s plus the PSU are pretty serious investment (for me anyway )
Just using one 3870X2 at a time but getting the problems on each
Have installed RivaTuner and also GPU-Z which is outputing to a log file.
Interestingly, there are some logged VCCD current spikes but I haven't had chance to compare with Vista Event logs to see if the resets are related.
I did notice that the GPU-Z readings for each core are radically different (temp and VCCD) - is this ok or should they be sharing the load equally with roughyl equivalent numbers ? My current thinking is that the core driving the monitor is the one doing the work and so higher numbers but this logic could be wrong
In my system, the GPU labled "Core0" in RivaTuner is always the hottest one, and the core that gets all the load from watching movies or videos, etc. I have both monitors (1920x1200 and 1280x1024) running off the 3870x2.
Before I replaced the fans on the 3870x2 (ZEROTherm) I noticed that the system would lock if the GPU temp hit 92 celcius or so. That would happen with the fans fixed @40% by RivaTuner as the Catalyst drivers wouldn't spin up fast enough to make it more than 10 min or so during heavy gaming.
I don't get above 70 now on any core and I'm running the 3870x2 @855/955, and the 3870 @855/1170.
I get lots of spikes from the VCCD, and temps get pretty hot on them as well but it doesn't seem to hurt my system.
Have you tried another (spare, non 3870x2) in the system yet?
Hey Firebird - I am really grateful for the good advice and time you are taking over my problems.
I appear to be making some headway as I have pulled a spare hard drive off my shelf and have carefully built up a new Vista 32 installation - this has now been running for about 18 hours without any spontaneous resets.
Previously the resets have happened both at idle, during gamplay, running ATITool tests etc. The only way I could get stability was to pull thew 3870X2 and revert to old cards (NVIDIA 8600 or ATI X1650).
I am also running an extemely lean setup - all of my non boot drives are disconnected to narrow down the active components
GPU-Z is reporting core temps of around 65 degrees on core 0 and 52 degrees on core 1 with fairly low fan revs. Rivatuner seems to be managing fan speeds effectively.
I have not yet tried to stress the 3870 with any intensive games but this is my next step (or maybe using a decent benchmark progamme if i can find one).
I am really a novice when it comes to fancy graphics cards so I really appreciate your guidance
It's funny you mentioned the other hard drive. When I had issues with lock ups and crashes, I was also getting these wierd warnings related to the hard disk. I really thought my drives were dying, but after I got re-installed Vista for the 3rd time I decided not to use Everest for benchmarks and monitoring, and I've not seen the errors again.