hey, recently while playing games i've noticed some flickering green pixels appearing on screen sometimes. after a while the flickering pixels slowly increase in number, and then the game hangs and vpu recover kicks in, after which the game either un-hangs or crashes, although whichever happens the pixels stop appearing afterwards until i reboot my computer. i don't think the card is overheating (45c idle, 50-55 load), the drivers are up-to-date and the memory/gpu clock are unchanged, does anyone know how to fix this?
Well, i too have a similar problem but my guess is that it is game specific.. For me the same happens whenever i play I.G.I 2 and GTA: Vice City which are a good 8+ years old games already.. Never noticed it with the more recent titles.. My theory is that it is the case of GPU over efficiency.. These games i mentioned don't give that much a workout to a card as powerful as 4870 (the first time i played them was with onboard intel g845).. Moreover, due to the 1GB frame buffer, the card usually draws up a large scene and then has to sit idol until suddenly it has to draw again.. This switching must be causing the card to not respond as smoothly and thus hang after which it either recovers back to the game or the desktop.. This is just a theory.. I could solve the problem in I.G.I 2 somewhat by disabling the CPU multiplexing option in the bios.. Which games are you noticing such behaviour.? Based on that info we might be able to understand the reasons behind it..
thats really not the sort of drop i was expecting. I'm thinking that maybe the thermal pads have torn, and are no longer making proper contact with the chips. it gets a little complicated from there though, since you'd need to take the heatsink of the card to have a look.
the other thing you can try is downclocking the memory (or the core, but i don't think thats the problem) and then running a stress test. this should reduce some of the heat also. its not a permanent fix, but will at least identify the problem.
if downclocking + high fan speed doesn't make the problem disappear, then its almost certainly a hardware fault and won't be easily fixed (if it can be fixed at all)
is the card still under warranty?
That is sad, could it not be the monitor causing the fault? maybe the refresh rate is to high or the monitors power supply is dying?
the monitor's newer than the card, refresh rate is 60hz, not sure if that's bad (it's a samsung t220)
i've noticed a couple of other things too-
the fan doesn't spin normally until it reaches the os; during boot it doesn't spin at all, then spins at 100% for a few seconds then stops again, won't spin again after that until it reaches the os
when the games hang, occassionally vpu recover doesn't kick in and the card just kinda stops, as in the fan stops and the monitor stops getting any signal, but i can still hear music for example. it also does the one-time-100%-spin thing i mentioned above
and tbh i'm not sure if it's artifacting or not, it's like a spike-shaped graphic appears on screen for a split second then disappears every few seconds, i'll try to get a screenshot if it helps