Nelviticus
Programmer
I have always used nVidia cards but recently bought one of ATI's new 4850 cards. It's nice and zippy but my PC has exhibited odd behaviour since I installed it and I'm wondering whether a) this is a common quirk of ATI cards and their drivers, b) it's a quirk of the new 48xx series or c) my card is slightly faulty.
What happens is that the mouse locks up or slows down sometimes and occasionally clicks don't register. It's particularly noticeable when you do something like alt-tab from a game to another app - for a second the mouse won't be able to move. With my nVidia cards this didn't happen.
I bought a new power supply when I bought the card (a Corsair HX620, which is on ATI's approved list for the 4850) so that isn't the problem.
I initially thought it might be a fault with my motherboard so I upgraded to a new one (something which I had been intending to do anyway).
I then thought it might be a faulty mouse (Logitech wireless USB) so I bought a new one. Then I thought maybe my keyboard was the problem so I replaced it with a wired one (not as silly as it sounds - I had spilled beer all over both mouse & keyboard a couple of days before I installed the gfx card).
As the 48xx cards run pretty hot I though that could be it, so I fitted a Zalman cooler. This reduced the temperature significantly but didn't solve the problem.
There is one other oddness apart from the 'sticky' mouse and that is that when Windows boots, just before the logon screen appears I briefly get a black screen with a white bar across the top, about 20% of the screen's height.
Any ideas? I think that if it is a faulty card I might be in trouble because apart from these small quirks it works properly, so if I return it they're just going to test it and say that everything is fine. Plus, i've removed the cooler and probably invalidated my warranty
Nelviticus
What happens is that the mouse locks up or slows down sometimes and occasionally clicks don't register. It's particularly noticeable when you do something like alt-tab from a game to another app - for a second the mouse won't be able to move. With my nVidia cards this didn't happen.
I bought a new power supply when I bought the card (a Corsair HX620, which is on ATI's approved list for the 4850) so that isn't the problem.
I initially thought it might be a fault with my motherboard so I upgraded to a new one (something which I had been intending to do anyway).
I then thought it might be a faulty mouse (Logitech wireless USB) so I bought a new one. Then I thought maybe my keyboard was the problem so I replaced it with a wired one (not as silly as it sounds - I had spilled beer all over both mouse & keyboard a couple of days before I installed the gfx card).
As the 48xx cards run pretty hot I though that could be it, so I fitted a Zalman cooler. This reduced the temperature significantly but didn't solve the problem.
There is one other oddness apart from the 'sticky' mouse and that is that when Windows boots, just before the logon screen appears I briefly get a black screen with a white bar across the top, about 20% of the screen's height.
Any ideas? I think that if it is a faulty card I might be in trouble because apart from these small quirks it works properly, so if I return it they're just going to test it and say that everything is fine. Plus, i've removed the cooler and probably invalidated my warranty
Nelviticus