Okay, so I recently got an AMD Radeon 7750 XFX Core Edition, which comes with 2GB of GDDR3 RAM (Link to the page). I'm able to overclock the core from 800MHz to 900MHz no problem, but the RAM is not overclockable, and is stuck at 667MHz.
When I noticed this, I immediately said, "WTF?" The card is advertised to have a RAM speed of 1125 MHz (if I'm not mistaken). Plus, whenever I do try to up the speed in Catalyst Control Center, the Core overclocks fine, but when I overclock the RAM my screens start showing green tears and artifacts before the card ultimately shuts down. Restarting the computer resets the overclock speed to 667MHz.
I know that DDR stands for double Data Rate, so is the RAM actually performing normally for GDDR3?
Has anybody had this problem or a similar one?
Thanks in advance for any help, guys!