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GPU Comparison
NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon R9 390 X2
NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon R9 390 X2
VS
NVIDIA GeForce GTX 660 Rev. 2
AMD Radeon R9 390 X2
We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 8GB VRAM Radeon R9 390 X2 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
Boost Clock1032MHz
Lower TDP (140W vs 580W)
AMD Radeon R9 390 X2 's Advantages
Released 1 years late
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (345.6GB/s vs 144.2GB/s)
1600 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GTX 660 Rev. 2
1.981 TFLOPS
Radeon R9 390 X2
+158%
5.12 TFLOPS
GeForce GTX 660 Rev. 2
VS
Radeon R9 390 X2
Graphics Card
Sep 2014
Release Date
Sep 2015
GeForce 600
Generation
Pirate 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
1350 MHz
Memory
2GB
Memory Size
8GB
GDDR5
Memory Type
GDDR5
192bit
Memory Bus
512bit
144.2GB/s
Bandwidth
345.6GB/s
Render Config
-
SM Count
-
-
Compute Units
40
960
Shading Units
2560
80
TMUs
160
24
ROPs
64
-
Tensor Cores
-
-
RT Cores
-
16 KB (per SMX)
L1 Cache
16 KB (per CU)
384 KB
L2 Cache
1024 KB
Theoretical Performance
20.64 GPixel/s
Pixel Rate
64.00 GPixel/s
82.56 GTexel/s
Texture Rate
160.0 GTexel/s
-
FP16 (half)
-
1.981 TFLOPS
FP32 (float)
5.120 TFLOPS
82.56 GFLOPS
FP64 (double)
640.0 GFLOPS
Graphics Processor
GK104
GPU Name
Grenada
-
GPU Variant
Grenada PRO (215-0880030)
Kepler
Architecture
GCN 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
3.54 billion
Transistors
6.2 billion
294 mm²
Die Size
438 mm²
Board Design
140W
TDP
580W
300 W
Suggested PSU
950 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
1x 6-pin
Power Connectors
4x 8-pin
Graphics Features
12 (11_0)
DirectX
12 (12_0)
4.6
OpenGL
4.6
3.0
OpenCL
2.0
1.1
Vulkan
1.2
3.0
CUDA
-
5.1
Shader Model
6.3
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