ATI Radeon HD 2900 XT vs ATI Radeon HD 4650
ATI Radeon HD 2900 XT
$399
ATI Radeon HD 4650
|
320 Shaders
1GB GDDR4
743MHz
|
320 Shaders
512MB GDDR3
650MHz
|
|
Peak AI Performance
480 GFLOPS
FP32
|
Peak AI Performance
420 GFLOPS
FP32
|
|
FP32
480 GFLOPS
|
FP32
420 GFLOPS
|
|
Form Factor
PCIe Card
2.0-Slots
|
Form Factor
PCIe Card
1.0-Slots
|
|
TDP
215W
|
TDP
48W
|
|
Power Connectors
1x 6-Pin
1x 8-Pin
|
-
-
-
|
Peak AI Performance
|
|
Radeon HD 2900 XT - 480 GFLOPS FP32
x1.14
Radeon HD 4650 - 420 GFLOPS FP32
x1
FP32
|
|
Radeon HD 2900 XT - 480 GFLOPS FP32
x1.14
Radeon HD 4650 - 420 GFLOPS FP32
x1
|
|
Radeon HD 2900 XT - 128GB/s
x8
Radeon HD 4650 - 16GB/s
x1
|
|
Radeon HD 2900 XT - 215W
x4.48
Radeon HD 4650 - 48W
x1
|
0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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0%
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Manufacturer
ATI
|
Manufacturer
ATI
|
|
Chip Designer
ATI
|
Chip Designer
ATI
|
|
Architecture
TeraScale 1
|
Architecture
TeraScale 1
|
|
Family
Radeon HD 2000
|
Family
Radeon HD 4000
|
|
Codename
Pele
R600
Variant
R600 XT
|
Codename
Mario
RV730
Variant
RV730 Pro
|
|
Market Segment
Desktop
|
Market Segment
Desktop
|
|
Release Date
5/14/2007
|
Release Date
9/10/2008
|
|
Foundry
TSMC
|
Foundry
TSMC
|
|
Fabrication Node
80nm
|
Fabrication Node
55nm
|
|
Die Size
420 mm²
|
Die Size
146 mm²
|
|
Transistor Count
720 Million
|
Transistor Count
514 Million
|
|
Transistor Density
1.71M/mm²
|
Transistor Density
3.52M/mm²
|
|
Form
PCIe Card
|
Form
PCIe Card
|
|
Shading Units
320 Shaders
|
Shading Units
320 Shaders
|
|
Texture Mapping Units
16 TMUs
|
Texture Mapping Units
32 TMUs
|
|
Render Output Units
16 ROPs
|
Render Output Units
8 ROPs
|
|
Compute Units
4 CUs
|
Compute Units
4 CUs
|
|
-
743MHz
|
600MHz Base
650MHz
|
|
Peak AI Performance
480 GFLOPS
FP32
|
Peak AI Performance
420 GFLOPS
FP32
|
|
FP32
480 GFLOPS
|
FP32
420 GFLOPS
|
|
Pixel Fillrate
11.888 GPixel/s
|
Pixel Fillrate
5.2 GPixel/s
|
|
Texture Fillrate
11.888 GTexel/s
|
Texture Fillrate
20.8 GTexel/s
|
|
L1
-
Unknown
|
L1
16KB/CU
-
|
|
L2
256KB Shared
|
L2
128KB Shared
|
|
1GB
GDDR4
|
512MB
GDDR3
|
|
Bus Width
512Bit
|
Bus Width
128Bit
|
|
Clock
1000MHz
Transfer Rate
2GT/s
Bandwidth
128GB/s
|
Clock
500MHz
Transfer Rate
1GT/s
Bandwidth
16GB/s
|
|
TDP
215W
|
TDP
48W
|
|
1x S-Video
2x DVI-I Dual-Link
|
1x S-Video
2x DVI-I Dual-Link
|
|
Max Resolution
2560x1600
|
Max Resolution
2560x1600
|
|
Max Resolution Refresh Rate
60Hz
|
Max Resolution Refresh Rate
60Hz
|
|
Variable Refresh Rate
|
Variable Refresh Rate
|
|
Display Stream Compression (DSC)
Not Supported
|
Display Stream Compression (DSC)
Not Supported
|
|
Multi Monitor Support
2
|
Multi Monitor Support
2
|
|
No Encoders
|
No Encoders
|
|
Model
UVD 1.0
|
Model
UVD 2.2
|
|
Codec
VC-1
AVC (H.264)
|
Codec
VC-1
AVC (H.264)
|
|
Direct X
10
Direct 3D
10_0
|
Direct X
10
Direct 3D
10_1
|
|
OpenGL
3.3
OpenCL
1.1
|
OpenGL
3.3
OpenCL
1.1
|
|
Shader Model
4.0
GFX
3
|
Shader Model
4.1
GFX
3
|
|
1x Fan
|
1x Fan
|
|
Power Connectors
1x 6-Pin
1x 8-Pin
|
-
-
-
|
|
Slots Required
2.0
PCIe Version
1.0
PCIe Lanes
16
|
Slots Required
1.0
PCIe Version
2.0
PCIe Lanes
16
|
|
Multi GPU Support
Supported
Type
4-way CrossFireX
|
Multi GPU Support
Supported
Type
2-way CrossFireX
|
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