Radeon HD 3870 X2 vs Radeon HD 4700

Radeon HD 3870 X2
Radeon HD 4700
2x 320 Shaders
2x 512MB GDDR4
825MHz
320 Shaders
512MB DDR2
600MHz
FP32
1.06 TFLOPS
FP32
0.38 TFLOPS
-
-
-
-
Form Factor
PCIe Card
2.0-Slots
Form Factor
PCIe Card
1.0-Slots
TDP
165W
TDP
59W
Power Connectors
1x 6-Pin
1x 8-Pin
-
-
Power Connectors
1x 6-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 4000
Codename
Boom
R680
Variant
R680 XT
Codename
Wekiva
RV770
Variant
RV770 CE
Market Segment
Desktop
Market Segment
Desktop
Release Date
1/28/2008
Release Date
2/11/2009
Foundry
TSMC
-
Foundry
TSMC
-
Fabrication Node
55nm
-
Fabrication Node
55nm
-
Die Size
2x 192 mm²
-
Die Size
256 mm²
-
Transistor Count
2x 666 Million
-
Transistor Count
956 Million
-
Transistor Density
3.47M/mm²
-
Transistor Density
3.73M/mm²
-
Form
PCIe Card
Form
PCIe Card
Shading Units
2x 320 Shaders
-
Shading Units
320 Shaders
-
Texture Mapping Units
2x 16 TMUs
Texture Mapping Units
32 TMUs
Render Output Units
2x 16 ROPs
Render Output Units
8 ROPs
-
-
-
-
-
-
-
-
-
-
-
-
Compute Units
2x 4 CUs
Compute Units
8 CUs
-
-
-
-
-
-
-
-
-
-
-
825MHz
-
-
-
600MHz
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
FP32
1.06 TFLOPS
FP32
0.38 TFLOPS
-
-
-
-
FP64
0.21 TFLOPS
-
FP64
0.08 TFLOPS
-
-
-
-
-
-
-
-
-
-
-
Pixel Fillrate
13.2 GPixel/s
Pixel Fillrate
4.8 GPixel/s
-
-
-
-
Texture Fillrate
13.2 GTexel/s
Texture Fillrate
19.2 GTexel/s
-
-
-
-
L1
-
-
-
Unknown
L1
-
-
16KB/CU
-
L2
256KB Shared
L2
256KB Shared
-
-
-
-
-
-
2x 512MB
GDDR4
-
512MB
DDR2
-
Bus Width
256Bit
Bus Width
128Bit
Clock
1125MHz
Transfer Rate
2.3GT/s
Bandwidth
72GB/s
Clock
400MHz
Transfer Rate
800MT/s
Bandwidth
12.8GB/s
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TDP
165W
TDP
59W
-
-
-
-
-
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 2.0
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_1
OpenGL
3.3
OpenCL
1.1
-
-
OpenGL
3.3
OpenCL
1.1
-
-
Shader Model
4.1
-
-
GFX
3
-
-
-
-
Shader Model
4.1
-
-
GFX
3
-
-
-
-
-
-
-
1x Fan
-
-
-
1x Fan
Power Connectors
-
-
1x 6-Pin
1x 8-Pin
-
-
-
Power Connectors
-
-
1x 6-Pin
-
-
-
-
Slots Required
2.0
PCIe Version
2.0
PCIe Lanes
16
Slots Required
1.0
PCIe Version
2.0
PCIe Lanes
16
Multi GPU Support
Supported
Type
2-way CrossFireX
Multi GPU Support
Supported
Type
2-way CrossFireX
-
-
-
-
-
-
-
-
-
-
-
-
Change Results