I bought two Sapphire HD4830 512M cards a couple of days ago. Both cards run fine in single mode, but freeze after 10-20 minutes of gaming when in CF. Tried monitoring the temperature of both GPUs and CPU, one thing I can tell for sure is that it's not an overheating issue.
My PSU is FSP 600W,
MB: MSI Neo2-FR P45,
CPU: Intel E7200 @ 2.53GHz, no OC,
8 GB of RAM,
Vista Business SP1,
ATI Catalyst 8.12
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