Provided you used the PC is question and found it lacking in video needs that choice is yours. Yes, adding a new video card will free ram back for PC system use once the on-board video is disabled. In most cases, you'll increase video capabilities beyond on-board which are basic or OEM requirements match. i do suggest you review any new video cards specs and find out if replacing the PSU for for required needs(or better) and lets not exclude cooling as well. Doing this for the new video card is best for continued use to become less problematic. The more demanding the video card the more attention to details for the best overall operation becomes a MUST. So don't discount this because it may work for some time then start to falter later.
My question is.. Would adding a decent HD graphics card be beneficial over onboard graphics? I've heard that it will free up RAM, and help the CPU perform better but idk.. i dont game alot, but i do like HD video editing. My computer is a SFF, and the best Low Profile graphics card deal i have found is a 2GB Radeon HD5450 card.
Dell Optiplex 755 SFF
Intel Q6600 2.4 GHz (SLACR, G0 Stepping)
4GB DDR2 RAM (bout to upgrade to
Windows 7 HP 64 Bit
1.0 TB WD Caviar Black SATA HD
I capture Halo Gameplay with a Hauppauge HD PVR Gaming Edition, and edit with Sony Vegas Pro 9.0c