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GPU Comparison
NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon HD 6850
NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon HD 6850
VS
NVIDIA GeForce GTX 660 Rev. 2
AMD Radeon HD 6850
We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 1024MB VRAM Radeon HD 6850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 660 Rev. 2 's Advantages
Released 3 years and 11 months late
Boost Clock1032MHz
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (144.2GB/s vs 128.0GB/s)
AMD Radeon HD 6850 's Advantages
Lower TDP (127W vs 140W)
Score
Benchmark
FP32 (float)
GeForce GTX 660 Rev. 2
+33%
1.981 TFLOPS
Radeon HD 6850
1.488 TFLOPS
GeForce GTX 660 Rev. 2
VS
Radeon HD 6850
Graphics Card
Sep 2014
Release Date
Oct 2010
GeForce 600
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
980 MHz
Base Clock
-
1032 MHz
Boost Clock
-
1502 MHz
Memory Clock
1000 MHz
Memory
2GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
192bit
Memory Bus
256bit
144.2GB/s
Bandwidth
128.0GB/s
Render Config
-
SM Count
-
-
Compute Units
12
960
Shading Units
960
80
TMUs
48
24
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per SMX)
L1 Cache
8 KB (per CU)
384 KB
L2 Cache
512 KB
Theoretical Performance
20.64 GPixel/s
Pixel Rate
24.80 GPixel/s
82.56 GTexel/s
Texture Rate
37.20 GTexel/s
-
FP16 (half)
-
1.981 TFLOPS
FP32 (float)
1488 GFLOPS
82.56 GFLOPS
FP64 (double)
-
Graphics Processor
GK104
GPU Name
Barts
-
GPU Variant
Barts PRO (215-0798006)
Kepler
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
3.54 billion
Transistors
1.7 billion
294 mm²
Die Size
255 mm²
Board Design
140W
TDP
127W
300 W
Suggested PSU
300 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
1x 6-pin
Power Connectors
1x 6-pin
Graphics Features
12 (11_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
3.0
OpenCL
1.2
1.1
Vulkan
N/A
3.0
CUDA
-
5.1
Shader Model
5.0
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