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GPU Comparison
NVIDIA GeForce GTX 660 vs AMD Radeon HD 8870 OEM
NVIDIA GeForce GTX 660 vs AMD Radeon HD 8870 OEM
VS
NVIDIA GeForce GTX 660
AMD Radeon HD 8870 OEM
We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 2GB VRAM Radeon HD 8870 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 660 's Advantages
Boost Clock1032MHz
Lower TDP (140W vs 175W)
AMD Radeon HD 8870 OEM 's Advantages
Larger VRAM bandwidth (153.6GB/s vs 144.2GB/s)
320 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GTX 660
1.981 TFLOPS
Radeon HD 8870 OEM
+29%
2.56 TFLOPS
GeForce GTX 660
VS
Radeon HD 8870 OEM
Graphics Card
Sep 2012
Release Date
Jan 2013
GeForce 600
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
980 MHz
Base Clock
-
1032 MHz
Boost Clock
-
1502 MHz
Memory Clock
1200 MHz
Memory
2GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
192bit
Memory Bus
256bit
144.2GB/s
Bandwidth
153.6GB/s
Render Config
-
SM Count
-
-
Compute Units
20
960
Shading Units
1280
80
TMUs
80
24
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per SMX)
L1 Cache
16 KB (per CU)
384 KB
L2 Cache
512 KB
Theoretical Performance
20.64 GPixel/s
Pixel Rate
32.00 GPixel/s
82.56 GTexel/s
Texture Rate
80.00 GTexel/s
-
FP16 (half)
-
1.981 TFLOPS
FP32 (float)
2.560 TFLOPS
82.56 GFLOPS
FP64 (double)
160.0 GFLOPS
Graphics Processor
GK106
GPU Name
Pitcairn
GK106-400-A1
GPU Variant
Pitcairn XT (215-0828047)
Kepler
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.54 billion
Transistors
2.8 billion
221 mm²
Die Size
212 mm²
Board Design
140W
TDP
175W
300 W
Suggested PSU
450 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
1x 6-pin
Power Connectors
2x 6-pin
Graphics Features
12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
3.0
OpenCL
1.2
1.1
Vulkan
1.2
3.0
CUDA
-
5.1
Shader Model
5.1
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