List of generation AMD Radeon HD 4000 series graphic cards
AMD Radeon model name
GPU name/ Tech proc.
Clock speed/ Turbo speed
Memory/Speed
PCI-E/AGP Version
Bits
TWD
CPU Mark
HD4890
RV790 (55nm)
850Mhz/----
1024(2048)Mb GDDR5 3900Mhz
PCI-E 2.0 x16
256…