Radeon HD 4870 512MB DDR5
I have the Visiontek HD4870 512MB DDR5, and using the "Adapter" tab within the "Advanced" feature of Window "Display Properties" identified the video card having 512MB. However, the ATI Catalyst Control Center (v.8.12) shows only 222MB hypermemory. How can I tell whether the video card really has the full 512MB available?
CLARIFICATION: I have two of these cards, but one uses the HD 4870 Reference Design (with only a single "leafblower-esque" fan) and the other looks just like the Palit sonic edition (with two fans). The Reference Design unit reads 512MB with ATI Catalyst Control Center (v.8.12). The unit that looks just like the Palit sonic edition (with two fans) is the one that is reports 222MB hypermemory using the ATI Catalyst Control Center (v.8.12). Both Vistiontek cards came in packaging advertising 512MB DDR5.