AMD Radeon HD 6870 vs NVIDIA GeForce GTX 660 GK104

AMD Radeon HD 6870 $239
NVIDIA GeForce GTX 660 GK104
1120 Shaders
2GB GDDR5
900MHz
1152 Shaders
2GB GDDR5
899MHz
Peak AI Performance
2.02 TFLOPS
FP32
Peak AI Performance
2.07 TOPS
INT32
FP32
2.02 TFLOPS
FP32
2.07 TFLOPS
Form Factor
PCIe Card
2.0-Slots
Form Factor
PCIe Card
2.0-Slots
TDP
151W
TDP
130W
Power Connectors
2x 6-Pin
Power Connectors
1x 6-Pin

Peak AI Performance

  • 2% slower vs GeForce GTX 660 GK104
  • 2% faster vs Radeon HD 6870
Radeon HD 6870 - 2.02 TFLOPS FP32
x1
GeForce GTX 660 GK104 - 2.07 TOPS INT32
x1.02

FP32

  • 2% slower vs GeForce GTX 660 GK104
  • 2% faster vs Radeon HD 6870
Radeon HD 6870 - 2.02 TFLOPS FP32
x1
GeForce GTX 660 GK104 - 2.07 TFLOPS FP32
x1.02
  • 3% slower vs GeForce GTX 660 GK104
  • 4% faster vs Radeon HD 6870
Radeon HD 6870 - 134.4GB/s
x1
GeForce GTX 660 GK104 - 139.2GB/s
x1.04
  • 16% higher vs GeForce GTX 660 GK104
  • 14% lower vs Radeon HD 6870
Radeon HD 6870 - 151W
x1.16
GeForce GTX 660 GK104 - 130W
x1
GB6 OpenCL N/A
0%
Manufacturer
AMD
Manufacturer
NVIDIA
Chip Designer
AMD
Chip Designer
NVIDIA
Architecture
TeraScale 2
Architecture
Kepler
Family
Radeon HD 6000
Family
GeForce 600
Codename
Barts
RV940
Variant
Barts XT
Codename
NVE4
GK104
Variant
GK104-200-KD-A2
Market Segment
Desktop
Market Segment
Desktop
Release Date
10/22/2010
Release Date
8/22/2012
Foundry
TSMC
Foundry
TSMC
Fabrication Node
40nm
Fabrication Node
28nm
Die Size
255 mm²
Die Size
294 mm²
Transistor Count
1.7 Billion
Transistor Count
3.5 Billion
Transistor Density
6.67M/mm²
Transistor Density
12.04M/mm²
Form
PCIe Card
Form
PCIe Card
Shading Units
1120 Shaders
Shading Units
1152 Shaders
Texture Mapping Units
56 TMUs
Texture Mapping Units
96 TMUs
Render Output Units
32 ROPs
Render Output Units
24 ROPs
-
-
Streaming Multiprocessors
6 SMs
Compute Units
14 CUs
-
-
-
900MHz
824MHz Base
899MHz
Peak AI Performance
2.02 TFLOPS
FP32
Peak AI Performance
2.07 TOPS
INT32
FP32
2.02 TFLOPS
FP32
2.07 TFLOPS
-
-
FP64
90 GFLOPS
-
-
INT32
2.07 TOPS
Pixel Fillrate
28.8 GPixel/s
Pixel Fillrate
21.576 GPixel/s
Texture Fillrate
50.4 GTexel/s
Texture Fillrate
86.304 GTexel/s
L1
-
-
8KB/CU
L1
48KB/SM Tex
16KB/SM
-
L2
512KB Shared
L2
512KB Shared
2GB
GDDR5
2GB
GDDR5
Bus Width
256Bit
Bus Width
192Bit
Clock
1050MHz
Transfer Rate
4.2GT/s
Bandwidth
134.4GB/s
Clock
1450MHz
Transfer Rate
5.8GT/s
Bandwidth
139.2GB/s
TDP
151W
TDP
130W
2x DVI-I Dual-Link
-
2x mini-DisplayPort 1.1
-
1x HDMI 1.3
-
1x DVI-I Dual-Link
1x DVI-D Dual-Link
-
1x DisplayPort 1.2
-
1x HDMI 1.4
Max Resolution
2560x1600
Max Resolution
4096x2304
Max Resolution Refresh Rate
60Hz
Max Resolution Refresh Rate
60Hz
Variable Refresh Rate
-
-
Variable Refresh Rate
G-Sync
FreeSync
Display Stream Compression (DSC)
Not Supported
Display Stream Compression (DSC)
Not Supported
Multi Monitor Support
2
Multi Monitor Support
3
No Encoders
-
Model
NVENC 1
-
-
Codec
AVC (H.264)
Model
UVD 3.0
Model
NVDEC 1
Codec
MPEG-1
MPEG-2
MPEG-4
VC-1
AVC (H.264)
Codec
MPEG-1
MPEG-2
MPEG-4
VC-1
AVC (H.264)
Direct X
11
Direct 3D
11_0
Direct X
12
Direct 3D
11_0
OpenGL
4.5
OpenCL
1.2
-
-
OpenGL
4.6
OpenCL
3.0
Vulkan
1.2
Shader Model
5.0
-
-
GFX
4
-
-
-
-
Shader Model
6.5
CUDA
3.0
-
-
PureVideo HD
VP5
VDPAU
Feature Set D
1x Fan
1x Fan
Power Connectors
2x 6-Pin
Power Connectors
1x 6-Pin
Slots Required
2.0
PCIe Version
2.1
PCIe Lanes
16
Slots Required
2.0
PCIe Version
3.0
PCIe Lanes
16
Multi GPU Support
Supported
Type
4-way CrossFireX
Multi GPU Support
Supported
Type
2-way SLI
Height
111 mm (4.37 in)
Width
247 mm (9.72 in)
Depth
36 mm (1.42 in)
Height
111 mm (4.37 in)
Width
241 mm (9.49 in)
Depth
38 mm (1.5 in)
Change Comparison