Radeon HD 2900 XT and GeForce 6800 GT DDL - video card comparison
Radeon HD 2900 XT
GeForce 6800 GT DDL
Architecture
TeraScale (2005−2013)
Curie (2003−2013)
GPU code name
R600
NV40
Market segment
Desktop
Desktop
Release date
May 2007
April 2004
Interface
PCIe 1.0 x16
AGP Pro 8x
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Core clock speed
743 MHz
350 MHz
Floating-point performance
475.5 gflops
-
Manufacturing process technology
80 nm
130 nm
Number of transistors
720 million
222 million
Pipelines / CUDA cores
320
-
Power consumption (TDP)
215 Watt
80 Watt
Texture fill rate
11.89
5.600
Memory type
GDDR3
GDDR3
Maximum RAM amount
512 MB
256 MB
Memory bus width
512 Bit
256 Bit
Memory clock speed
1656 MHz
1000 MHz
Memory bandwidth
106.0 GB/s
32 GB/s
Display Connectors
2x DVI, 1x S-Video
2x DVI
DirectX
10.0 (10_0)
9.0c (9_3)
OpenCL
N/A
N/A
OpenGL
3.3
2.1
Shader Model
4.0
3.0
Vulkan
N/A
N/A