Graphics Cards use different types of RAM. The most commonly used RAM in today's graphics cards is GDDR3 and GDDR5, where G means Graphics and DDR means Double Data Rate.

Does GPU have DDR?

(Graphics Double Data Rate) GDDR is double data rate (DDR) memory specialized for fast rendering on graphics cards (GPUs). Introduced in 2000, GDDR is the primary graphics RAM in use today. GDDR is technically "GDDR SDRAM" and supersedes VRAM and WRAM.

What DDR is my graphics card?

In the Display Settings box, select Advanced Display Settings and then choose the Display Adapter properties option. On the Adapter tab in the box, you should see the brand of the graphics card and its memory amount listed.