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GPU Comparison
NVIDIA GeForce GTX 660 vs ATI Radeon HD 4870 X2
NVIDIA GeForce GTX 660 vs ATI Radeon HD 4870 X2
VS
NVIDIA GeForce GTX 660
ATI Radeon HD 4870 X2
We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 1024MB VRAM Radeon HD 4870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 660 's Advantages
Released 4 years and 1 months late
Boost Clock1032MHz
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (144.2GB/s vs 115.2GB/s)
160 additional rendering cores
Lower TDP (140W vs 286W)
Score
Benchmark
FP32 (float)
GeForce GTX 660
+65%
1.981 TFLOPS
Radeon HD 4870 X2
1.2 TFLOPS
GeForce GTX 660
VS
Radeon HD 4870 X2
Graphics Card
Sep 2012
Release Date
Aug 2008
GeForce 600
Generation
Radeon R700
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
900 MHz
Memory
2GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
192bit
Memory Bus
256bit
144.2GB/s
Bandwidth
115.2GB/s
Render Config
-
SM Count
-
-
Compute Units
10
960
Shading Units
800
80
TMUs
40
24
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per SMX)
L1 Cache
16 KB (per CU)
384 KB
L2 Cache
256 KB
Theoretical Performance
20.64 GPixel/s
Pixel Rate
12.00 GPixel/s
82.56 GTexel/s
Texture Rate
30.00 GTexel/s
-
FP16 (half)
-
1.981 TFLOPS
FP32 (float)
1200 GFLOPS
82.56 GFLOPS
FP64 (double)
240.0 GFLOPS
Graphics Processor
GK106
GPU Name
R700
GK106-400-A1
GPU Variant
R700 XT (215-0669045)
Kepler
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
2.54 billion
Transistors
0.956 billion
221 mm²
Die Size
256 mm²
Board Design
140W
TDP
286W
300 W
Suggested PSU
600 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x S-Video
1x 6-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Features
12 (11_0)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3
3.0
OpenCL
1.1
1.1
Vulkan
N/A
3.0
CUDA
-
5.1
Shader Model
4.1
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