Games crashing under HD4870x2

[hatred]

I have a problem ...
I turn Vista64 (Home Premium) with Sapphire HD4870x2 and I have constant crashes when I play games. Outside games run smoothly and all I can do everything, it has really something with 3D acceleration seems to me. In any case with the card and / or drivers.

Problem is: I have 5 different driver versions tried, did (as instructed by a friend) PowerPlay disabled, I have one of the two cores disabled (in Catalyst Control Center the Catalyst AI off), I need new drivers for my motherboard (and thus also for the audio) installed ... nothing works. Did in the background while gaming GPU-Z to play though the core a bit warm (occasionally at 90 degrees), it is not a problem, it seems me. Moreover, it is not that the core is always hotter, or that he is correct at time of crash is very hot. I can not find any evidence for the time of crash. It can happen in a very quiet time but also during an intense fight scene, makes no difference.

Has anybody the same problem (had)? Or has someone another idea how to tackle?

[David23]

Have you ever run memory test? Maybe it is not the graphics card but the memory. The motherboard is also a possibility. Can you hd 4870x2 stop in another PC to see whether he is doing ? How many watts is your power supply?
I have the same problem because my power supply was not enough wattage.
for that card from you, it is wise to have a power supply 12Volt (700w of power have usually).

[hatred]

Thanks for the tip! Just 4 instances of memtest run (because I have 8gb RAM) and one after another error came in 30 minutes a piece or 10. Therefore appears that in fact the working is, of course, although you never can exclude double errors.

As for power supply: I have a Cooler Master Real Power M850.

Is there a monitoring tool that I can use for the performance of my RAM monitor while I play a game? So you can designate a point of 'look, it went wrong? Or I see things a little too easy?

[Team Leader]

If a 700 watt power supply can provide only 24 amps on the 12 volt lines, you have the worst diet of 700 watts you can find. A little 350 watt power supply can deliver more.

Do you have the voltage of the memory well and the timings also?

[hatred]

Just run 3DMark Vantage, and that was fine, until after the 2nd test, then my whole screen suddenly began to freeze.. I think that may not be the RAM, so that would mean that there is something with the Graphics card.

Thanks at least for the input!