Radeon HD 3870 vs Radeon HD 2900 Pro

Radeon HD 3870
Radeon HD 2900 Pro
320 Shaders
1GB GDDR4
777MHz
320 Shaders
512MB GDDR3
600MHz
FP32
0.5 TFLOPS
FP32
0.38 TFLOPS
-
-
-
-
Form Factor
PCIe Card
2.0-Slots
Form Factor
PCIe Card
2.0-Slots
TDP
106W
TDP
200W
Power Connectors
1x 6-Pin
-
-
-
Power Connectors
-
1x 8-Pin
-
-
GB5 OpenCL - N/A
0%
GB5 OpenCL - N/A
0%
GB5 CUDA - N/A
0%
GB5 CUDA - N/A
0%
GB5 Metal - N/A
0%
GB5 Metal - N/A
0%
GB5 Vulkan - N/A
0%
GB5 Vulkan - N/A
0%
OCT 2020.1 - N/A
0%
OCT 2020.1 - N/A
0%
OCT Metal - N/A
0%
OCT Metal - N/A
0%
Manufacturer
ATI
Manufacturer
ATI
Chip Designer
ATI
Chip Designer
ATI
Architecture
TeraScale 1
Architecture
TeraScale 1
Family
Radeon HD 3000
Family
Radeon HD 2000
Codename
Boom
RV670
Variant
RV670 XT
Codename
Pele
R600
Variant
R600 Pro
Market Segment
Desktop
Market Segment
Desktop
Release Date
11/19/2007
Release Date
9/25/2007
Foundry
TSMC
-
Foundry
TSMC
-
Fabrication Node
55nm
-
Fabrication Node
80nm
-
Die Size
192 mm²
-
Die Size
420 mm²
-
Transistor Count
666 Million
-
Transistor Count
720 Million
-
Transistor Density
3.47M/mm²
-
Transistor Density
1.71M/mm²
-
Form
PCIe Card
Form
PCIe Card
Shading Units
320 Shaders
-
Shading Units
320 Shaders
-
Texture Mapping Units
16 TMUs
Texture Mapping Units
16 TMUs
Render Output Units
16 ROPs
Render Output Units
16 ROPs
-
-
-
-
-
-
-
-
-
-
-
-
Compute Units
4 CUs
Compute Units
4 CUs
-
-
-
-
-
-
-
-
-
-
-
777MHz
-
-
-
600MHz
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
FP32
0.5 TFLOPS
FP32
0.38 TFLOPS
-
-
-
-
FP64
0.1 TFLOPS
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Pixel Fillrate
12.432 GPixel/s
Pixel Fillrate
9.6 GPixel/s
-
-
-
-
Texture Fillrate
12.432 GTexel/s
Texture Fillrate
9.6 GTexel/s
-
-
-
-
L1
-
-
-
Unknown
L1
-
-
-
Unknown
L2
256KB Shared
L2
256KB Shared
-
-
-
-
-
-
1GB
GDDR4
-
512MB
GDDR3
-
Bus Width
256Bit
Bus Width
512Bit
Clock
1126MHz
Transfer Rate
2.3GT/s
Bandwidth
72.1GB/s
Clock
800MHz
Transfer Rate
1.6GT/s
Bandwidth
102.4GB/s
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TDP
106W
TDP
200W
-
-
-
-
-
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 1.0
Codec
-
-
-
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
Codec
-
-
-
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
Direct X
10
Direct 3D
10_1
Direct X
10
Direct 3D
10_0
OpenGL
3.3
OpenCL
1.1
-
-
OpenGL
3.3
OpenCL
1.1
-
-
Shader Model
4.1
-
-
GFX
3
-
-
-
-
Shader Model
4.0
-
-
GFX
3
-
-
-
-
-
-
-
1x Fan
-
-
-
1x Fan
Power Connectors
-
-
1x 6-Pin
-
-
-
-
Power Connectors
-
-
-
1x 8-Pin
-
-
-
Slots Required
2.0
PCIe Version
2.0
PCIe Lanes
16
Slots Required
2.0
PCIe Version
1.0
PCIe Lanes
16
Multi GPU Support
Supported
Type
4-way CrossFireX
Multi GPU Support
Supported
Type
4-way CrossFireX
-
-
-
-
-
-
-
-
-
-
-
-
Change Results