Hardware museum

	Reference RV790 Board	Sapphire Radeon HD 4890 OC
GPU type	RV790	RV790
Manufacturing process	55 nm	55 nm
Transistors	959 million	959 million
Die size	282 mm²	282 mm²
ROPs	16	16
TMUs	40	40
PS / VS \| Unified Shaders	- / - \| 800	- / - \| 800
GPU clock	850 MHz	900 MHz (1.06×)
Pixel / texel fillrate	13 600 MP/s ; 34 000 MT/s	14 400 MP/s (1.08×) ; 36 000 MT/s (1.06×)
SP / DP gigaflops	1 360 ; 272	1 440 ; 288 (1.06×)
DirectX / OpenGL	10.1 ; 3.3	10.1 ; 3.3
CUDA / OpenCL	- ; 1.0	- ; 1.0
Memory	1 024 MB GDDR5	1 024 MB GDDR5
Memory	3 900 MHz ; 256 bit	4 000 MHz (1.33×) ; 256 bit
Bandwith	124 800 MB/s	128 000 MB/s (1.03×)
Interface	PCI-E 2.0 x16 [8 192 MB/s]	PCI-E 2.0 x16 [8 192 MB/s]
TDP	190 W	190 W
Analog I/O ports	1 × S-Video out, 2 × DVI-I	1 × S-Video out, 2 × DVI-I
Digital I/O ports	2 × DVI-I	2 × DVI-I
Independent screens	2	2
Introduce date	2009	2009