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Over 20 years of PC history

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Reference RV790 BoardSapphire Radeon HD 4890 OC
GPU typeRV790RV790
Manufacturing process55 nm55 nm
Transistors959 milion959 milion
Die size282 mm2282 mm2
ROPs1616
TMUs4040
PS / VS | Unified Shaders- / - | 800- / - | 800
GPU clock850 MHz900 MHz (1.06×)
Pixel / texel fillrate13600 MP/s ; 34000 MT/s14400 MP/s (1.06×) ; 36000 MT/s (1.06×)
SP / DP gigaflops1360 ; 2721440 (1.06×) ; 288 (1.06×)
DirectX / OpenGL10.1 ; 3.310.1 ; 3.3
CUDA / OpenCL- ; 1.0- ; 1.0
Memory1024 MB GDDR51024 MB GDDR5
Memory3900 MHz ; 256 bit4000 MHz (1.03×) ; 256 bit
Bandwith124800 MB/s128000 MB/s (1.03×)
InterfacePCI-E 2.0 x16 [8192 MB/s]PCI-E 2.0 x16 [8192 MB/s]
TDP190 W190 W
Analog I/O ports1 × S-Video out, 2 × DVI-I1 × S-Video out, 2 × DVI-I
Digital I/O ports2 × DVI-I2 × DVI-I
Independent screens22
Introduce date20092009