GeForce 6800 Ultra and Radeon X1800 XT - video card comparison
GeForce 6800 Ultra
Radeon X1800 XT
Architecture
Curie (2003−2013)
R500 (2005−2007)
GPU code name
NV45
R520
Market segment
Desktop
Desktop
Release date
July 2004
October 2005
Interface
PCIe 1.0 x16
PCIe 1.0 x16
Supplementary power connectors
1x 6-pin
1x 6-pin
Core clock speed
425 MHz
600 MHz
Manufacturing process technology
130 nm
90 nm
Number of transistors
222 million
321 million
Power consumption (TDP)
81 Watt
113 Watt
Texture fill rate
6.800
9.600
Memory type
GDDR3
GDDR3
Maximum RAM amount
256 MB
512 MB
Memory bus width
256 Bit
256 Bit
Memory clock speed
1100 MHz
1400 MHz
Memory bandwidth
35.2 GB/s
44.8 GB/s
Display Connectors
2x DVI, 1x S-Video
2x DVI, 1x S-Video
DirectX
9.0c (9_3)
9.0c (9_3)
OpenCL
N/A
N/A
OpenGL
2.1
2.0
Shader Model
3.0
3.0
Vulkan
N/A
N/A