ATI Radeon HD 2900 XT vs ATI Radeon HD 4650
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XT and 256MB VRAM Radeon HD 4650 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
ATI Radeon HD 2900 XT 's Advantages
More VRAM (512GB vs 256GB)
Larger VRAM bandwidth (106.0GB/s vs 22.40GB/s)
ATI Radeon HD 4650 's Advantages
Released 1 years and 4 months late
Lower TDP (48W vs 215W)
Score
Benchmark
FP32 (float)
Radeon HD 2900 XT
+23%
0.476 TFLOPS
Radeon HD 4650
0.384 TFLOPS
Graphics Card
May 2007
Release Date
Sep 2008
Radeon R600
Generation
Radeon R700
Desktop
Type
Desktop
PCIe 1.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
828 MHz
Memory Clock
700 MHz
Memory
512MB
Memory Size
256MB
GDDR3
Memory Type
GDDR3
512bit
Memory Bus
128bit
106.0GB/s
Bandwidth
22.40GB/s
Render Config
4
Compute Units
4
-
-
-
320
Shading Units
320
16
TMUs
32
16
ROPs
8
-
-
-
-
-
-
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
128 KB
-
-
-
Theoretical Performance
11.89 GPixel/s
Pixel Rate
4.800 GPixel/s
11.89 GTexel/s
Texture Rate
19.20 GTexel/s
-
-
-
475.5 GFLOPS
FP32 (float)
384.0 GFLOPS
-
-
-
Board Design
215W
TDP
48W
550 W
Suggested PSU
200 W
2x DVI
1x S-Video
Outputs
2x DVI
1x S-Video
1x 6-pin + 1x 8-pin
Power Connectors
-
Graphics Processor
R600
GPU Name
RV730
R600 XT
(215RGMDKA13FG)
GPU Variant
RV730 PRO
(215-0719056)
TeraScale
Architecture
TeraScale
TSMC
Foundry
TSMC
80 nm
Process Size
55 nm
0.72 billion
Transistors
0.514 billion
420 mm²
Die Size
146 mm²
Graphics Features
10.0 (10_0)
DirectX
10.1 (10_1)
3.3 (full)
4.0 (partial)
OpenGL
3.3
N/A
OpenCL
1.1
N/A
Vulkan
N/A
-
-
-
4.0
Shader Model
4.1
