NVIDIA GeForce GTX 490 vs ATI Radeon HD 2900 XTX
We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 490 and 512MB VRAM Radeon HD 2900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 490 's Advantages
More VRAM (1536GB vs 512GB)
Larger VRAM bandwidth (164.0GB/s vs 106.0GB/s)
160 additional rendering cores
ATI Radeon HD 2900 XTX 's Advantages
Lower TDP (240W vs 365W)
Score
Benchmark
FP32 (float)
GeForce GTX 490
+144%
1.166 TFLOPS
Radeon HD 2900 XTX
0.476 TFLOPS
Graphics Card
Unknown
Release Date
Unknown
GeForce 400
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 1.0 x16
Clock Speeds
-
-
-
-
-
-
854 MHz
Memory Clock
828 MHz
Memory
1536MB
Memory Size
512MB
GDDR5
Memory Type
GDDR3
384bit
Memory Bus
512bit
164.0GB/s
Bandwidth
106.0GB/s
Render Config
-
Compute Units
4
15
SM Count
-
480
Shading Units
320
60
TMUs
16
48
ROPs
16
-
-
-
-
-
-
64 KB (per SM)
L1 Cache
-
768 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
18.24 GPixel/s
Pixel Rate
11.89 GPixel/s
36.48 GTexel/s
Texture Rate
11.89 GTexel/s
-
-
-
1166 GFLOPS
FP32 (float)
475.5 GFLOPS
145.8 GFLOPS
FP64 (double)
-
Board Design
365W
TDP
240W
750 W
Suggested PSU
550 W
3x DVI
1x mini-DisplayPort
Outputs
2x DVI
1x S-Video
2x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
GF100
GPU Name
R600
GF100-375-A3
GPU Variant
R600 XTX A11
(215RGMDKA11FG)
Fermi
Architecture
TeraScale
TSMC
Foundry
TSMC
40 nm
Process Size
80 nm
3.1 billion
Transistors
0.72 billion
529 mm²
Die Size
420 mm²
Graphics Features
12 (11_0)
DirectX
10.0 (10_0)
4.6
OpenGL
3.3 (full)
4.0 (partial)
1.1
OpenCL
N/A
N/A
Vulkan
N/A
2.0
CUDA
-
5.1
Shader Model
4.0
