SAPPHIRE's Vapor-X cooler was introduced in 2007 with its HD 3870 rolled out to the global market with the successful TOXIC HD 3870 and HD 4870 series. Sapphire brings the power of graphics 'supercomputing' to enthusiasts with their Vapor-X Radeon HD 4870 card. Built on Sapphire's original Vapor Chamber. Sep 11, 2012 Download drivers for Sapphire VAPOR-X HD 4870 1GB GDDR5 PCI-E. Drivers are compatible with Windows 7 / Windows 7 64 bit / Windows. Sapphire HD 4870 Vapor-X 1 GB. RV770. Graphics Processor. 800. Cores. 40. TMUs. 16. ROPs. 1024 MB. Memory Size. GDDR5. Memory Type.