NVIDIA GeForce GTX 660 vs AMD Radeon HD 6970

NVIDIA GeForce GTX 660 $230
AMD Radeon HD 6970 $369
960 Shaders
2GB GDDR5
1084MHz
1536 Shaders
2GB GDDR5
880MHz
Peak AI Performance
2.08 TOPS
INT32
Peak AI Performance
2.7 TFLOPS
FP32
FP32
2.08 TFLOPS
FP32
2.7 TFLOPS
Form Factor
PCIe Card
2.0-Slots
Form Factor
PCIe Card
2.0-Slots
TDP
140W
TDP
250W
Power Connectors
1x 6-Pin
-
Power Connectors
1x 6-Pin
1x 8-Pin

Peak AI Performance

  • 23% slower vs Radeon HD 6970
  • 30% faster vs GeForce GTX 660
GeForce GTX 660 - 2.08 TOPS INT32
x1
Radeon HD 6970 - 2.7 TFLOPS FP32
x1.3

FP32

  • 23% slower vs Radeon HD 6970
  • 30% faster vs GeForce GTX 660
GeForce GTX 660 - 2.08 TFLOPS FP32
x1
Radeon HD 6970 - 2.7 TFLOPS FP32
x1.3
  • 18% slower vs Radeon HD 6970
  • 22% faster vs GeForce GTX 660
GeForce GTX 660 - 144.2GB/s
x1
Radeon HD 6970 - 176GB/s
x1.22
  • 44% lower vs Radeon HD 6970
  • 79% higher vs GeForce GTX 660
GeForce GTX 660 - 140W
x1
Radeon HD 6970 - 250W
x1.79
  • 68% faster vs Radeon HD 6970
  • 41% slower vs GeForce GTX 660
GeForce GTX 660 - GB6 OpenCL 11,625
x1.68
Radeon HD 6970 - GB6 OpenCL 6,915
x1
GB6 Metal N/A
0%
GB6 Vulkan N/A
0%
Manufacturer
NVIDIA
Manufacturer
AMD
Chip Designer
NVIDIA
Chip Designer
AMD
Architecture
Kepler
Architecture
TeraScale 3
Family
GeForce 600
Family
Radeon HD 6000
Codename
NVE6
GK106
Variant
GK106-400-A1
Codename
Cayman
RV970
Variant
Cayman XT
Market Segment
Desktop
Market Segment
Desktop
Release Date
9/13/2012
Release Date
12/15/2010
Foundry
TSMC
Foundry
TSMC
Fabrication Node
28nm
Fabrication Node
40nm
Die Size
221 mm²
Die Size
389 mm²
Transistor Count
2.5 Billion
Transistor Count
2.6 Billion
Transistor Density
11.49M/mm²
Transistor Density
6.79M/mm²
Form
PCIe Card
Form
PCIe Card
Shading Units
960 Shaders
Shading Units
1536 Shaders
Texture Mapping Units
80 TMUs
Texture Mapping Units
96 TMUs
Render Output Units
24 ROPs
Render Output Units
32 ROPs
Streaming Multiprocessors
5 SMs
-
-
-
-
Compute Units
24 CUs
980MHz Base
1084MHz
-
880MHz
Peak AI Performance
2.08 TOPS
INT32
Peak AI Performance
2.7 TFLOPS
FP32
FP32
2.08 TFLOPS
FP32
2.7 TFLOPS
FP64
90 GFLOPS
FP64
680 GFLOPS
INT32
2.08 TOPS
-
-
Pixel Fillrate
26.016 GPixel/s
Pixel Fillrate
28.16 GPixel/s
Texture Fillrate
86.72 GTexel/s
Texture Fillrate
84.48 GTexel/s
L1
48KB/SM Tex
16KB/SM
-
L1
-
-
8KB/CU
L2
512KB Shared
L2
512KB Shared
2GB
GDDR5
2GB
GDDR5
Bus Width
192Bit
Bus Width
256Bit
Clock
1502MHz
Transfer Rate
6GT/s
Bandwidth
144.2GB/s
Clock
1375MHz
Transfer Rate
5.5GT/s
Bandwidth
176GB/s
TDP
140W
TDP
250W
1x DVI-I Dual-Link
1x DVI-D Dual-Link
-
1x DisplayPort 1.2
-
1x HDMI 1.4
2x DVI-I Dual-Link
-
2x mini-DisplayPort 1.1
-
1x HDMI 1.3
-
Max Resolution
4096x2304
Max Resolution
2560x1600
Max Resolution Refresh Rate
60Hz
Max Resolution Refresh Rate
60Hz
Variable Refresh Rate
G-Sync
FreeSync
Variable Refresh Rate
-
-
Display Stream Compression (DSC)
Not Supported
Display Stream Compression (DSC)
Not Supported
Multi Monitor Support
3
Multi Monitor Support
3
Model
NVENC 1
No Encoders
-
Codec
AVC (H.264)
-
-
Model
NVDEC 1
Model
UVD 3.1
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
12
Direct 3D
11_0
Direct X
11
Direct 3D
11_0
OpenGL
4.6
OpenCL
3.0
Vulkan
1.2
OpenGL
4.5
OpenCL
1.2
-
-
Shader Model
6.5
CUDA
3.0
-
-
PureVideo HD
VP5
VDPAU
Feature Set D
Shader Model
5.0
-
-
GFX
5
-
-
-
-
1x Fan
1x Fan
Power Connectors
1x 6-Pin
-
Power Connectors
1x 6-Pin
1x 8-Pin
Slots Required
2.0
PCIe Version
3.0
PCIe Lanes
16
Slots Required
2.0
PCIe Version
2.1
PCIe Lanes
16
Multi GPU Support
Supported
Type
2-way SLI
Multi GPU Support
Supported
Type
4-way CrossFireX
Height
111 mm (4.37 in)
Width
241 mm (9.49 in)
Depth
38 mm (1.5 in)
Height
126 mm (4.96 in)
Width
286 mm (11.26 in)
Depth
42 mm (1.65 in)
Change Comparison