ATI Mobility Radeon HD 4870: specs and benchmarks
ATI started Mobility Radeon HD 4870 sales 9 January 2009. This is TeraScale 2 architecture notebook card based on 55 nm manufacturing process and primarily aimed at gamers. 0.5 GB of GDDR3 memory clocked at 1.78 GHz are supplied, and together with 256 Bit memory interface this creates a bandwidth of 56.8 GB/s.
Compatibility-wise, this is card attached via PCIe 2.0 x16 interface.
It provides poor gaming and benchmark performance at 5.93 percent of a leader's which is AMD Radeon R9 390 X2.