You can find just as many links that say the opposite.http://xtreview.com/addcomment-id-8332-view-colorful-low-end-geforce-9800-gt.html
Not to mention Colorful's description of their GPU.
"Model Colorful GF9800GT 512M DDR2 M25 formed on a red PCB design and custom fitted to the original design of the active air-cooling system, including the presence of a round aluminum radiator and installed in the center of the fan with a translucent blue impeller. This novelty has 112 stream processors, uses the PCI Express bus 2. 0 x16 and compatible with DirectX 10. 0 Shader Model 4. 0. With respect to the communication capabilities products, they are represented on the back cover removed ports DVI, D-Sub and HDMI."
Among others. Plus, you have that GPU in hand and it's detecting as DDR2, which is a pretty good indication that the DD2 references are correct, not the DDR3 references.
Even if it's *supposed* to have DDR3 memory -- and I've seen many indications that it does not -- there would be absolutely nothing you could do to remedy the situation at this point.