Hi guys, I just bought a PowerColor Radeon HD 5750 with the passive SCS3 cooler yesterday. Very nice card and very, very nice gaming. Last time I gamed was 5-6 years ago and I see a lot has happened since. The problem My girlfriend was playing Sims 3 and suddenly the screen became black. I thought it could be a heat problem, but we rebooted and she continued playing with no more problems. Afterwards I tried to play Modern Warfare 2, which seems to be pretty graphics intensive. After about an hour, the screen became black. I rebooted and checked CPU temperature in BIOS (running a 5050e+ with a passive Thermalright HR-01 PLUS). They were fine somewhat above 40 degrees celcius. I downloaded and ran FurMark 1.8.0 and noticed, that the GPU temperature would rise to about 105 degrees in 10 minutes time and cause the screen to go black. Hence I conclude that I need to do something about the airflow in the case. The system I have a ThermalTake DH-103 (ATX) media center case with two 120mm fans (1 in, 1 out) running with 12v. I cannot fit anymore fans into the case. The CPU cooler is fanless, but I don't think putting a fan on it will make better airflow. I have a Gigabyte GA-MA78G-DS3H motherboard and I need, as a minimum, to have a Hauppauge HVR-2200 TV-tuner and the ATI card installed. Currently an aditional SoundBlaster X-FI is installed. The Hauppauge HVR-2200 low-profile TV tuner is placed in a PCI-E x1 slot right next to the GFX, but not on the "cooler" side of it - on the back side. Should I try to find another slot to make better airflow around the memory on the GFX? Should I open the unused ports in the back of the case to allow the hot air around the GFX to get out that way or would it spoil the airflow? Anything else I should consider? Best regards.