ATI Mobility Radeon HD 4870 X2: specs and benchmarks
ATI started Mobility Radeon HD 4870 X2 sales 9 January 2009. This is TeraScale 2 architecture notebook card based on 55 nm manufacturing process and primarily aimed at gamers. 2x 1 GB of GDDR5 memory clocked at 2.8 GHz are supplied, and together with 2x 256 Bit memory interface this creates a bandwidth of 2x 89.6 GB/s.
Compatibility-wise, this is card attached via PCIe 2.0 x16 interface.
It provides poor gaming and benchmark performance at 7.38 percent of a leader's which is AMD Radeon R9 390 X2.