Just GOT back from work today and sat down to new favorite PC game that I hate (don't ask its complicated). Anyway, I noticed that the game was a bit laggy so naturally I ignored it. Five minutes later the screen went blank, the sound stuttered and died & the keyboard locked. I had to hard reset. Now this happened last night but I thought nothing of it. I repeated the process to get the exact same result. I've switched out my new ATi Radeon 5770 for my old 3870, sure as could be everything worked PERFECTLY. I replaced the 5770 just to be sure but everything worked fine after that to.

So bearing in mind that the 5770 graphics card is a known problem child, can anyone think of anything else that might be the problem? No software updates have been manually or automatically installed for the last month.

The only other odd occurrence was 2-3 days ago when the computer was told to shut down but failed to switch off. Windows exited and saved (no "Windows was not shut down correctly" message upon reboot), the screen went blank and all the fans reved up to maximum speed and stayed LIKE it until I switched the power off at the wall. The reset and power switch were not responsive.

My system specs are as listed in profile.DLoad install and run Speedfan...
Post your temps.I can tell you now that it's not a temperature issue. Idle temp is about 30°C and it can get up to a staggering 60°C. This Card is brand new and I have been thinking about returning it for another GPU but I'm a bit limited on options:

ATi Radeon 5770 £140 [Win7 64-bit issues] Current GPU
ATi Radeon 5970 £550 [I don't have that sort of money, well... I do but i'm too stingy]
ATi Radeon 5870 £325 [I'm not paying £200 more for 2X the proccessing cores]
Nvidia Geforce GTX 480 £500 [Overpriced rubbish]hmm, can't seem to modify my last post nvm, double post!

I was talking to a friend yesterday. He has a GTX 285-480 (not sure which now)... He uses a mains AC bathroom fan strapped to the bottom of his PC to keep it below 100°C

Just waiting on power adapter for floppy disk drive for the BIOS update. If that has no effect then I'll have to return the GPU, unless anyone has any suggestions? Also should everything go to pot, should I try a replacement video card or just give up on the 5700 series?Argh! What is going on?! Monday, my computer is unusable due to program crashes and full graphics failures (system has to be hard reset) every 15mins and today all is fine. Perfect infact.
I HAVE DONE NOTHING! The computer has no changes from Monday (was kept off on Tuesday). There was a security update and office updates today but all was well before that! Running for 12 hours now, not even one error message (excluding cannot divide by 0).Umm, glad to hear you fixed it ...That's the point though. Is it fixed or the calm before the storm? But in all seriousness, the computer has gone from glitchy to very unstable to completely stable for no reason. I don't like the fact that nothing has been fixed.You moved it around though, probably cleaned the dust out, reseated some components.

We used to call it the car ride syndrome. Sometimes the computer just needs to go for a ride.

When I worked in computers we would see that once in a while.I agree and have seen that myself but the computer was untouched from Monday to Wednesday. It should have behaved in the same way yesterday. Now I just have the dilemma do I update the BIOS or leave it and keep my fingers crossed that it stays good?

My mouse pointer has just doubled in size so I'll try the update.Sometimes simply logging on to CH and posting will fix an issue... I've updated the BIOS to version 1903 and so far no crashes, errors or giant mouse pointers. It's been a couple of days now and think its safe to say fixed!

So anyone else suffering from crashes, errors and GMS with the ATi Radeon 5000 series, try updating your BIOS (as a last resort).

[GMS = Giant Mouse Syndrome]ahhh, 1903- a simpler time, where BIOS's were made right...I often worry if BIOS version 1903 was actually ASUS' 1903rd attempt at getting it right.