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GPU Comparison
NVIDIA GeForce GTX 660 vs AMD Radeon R9 390
NVIDIA GeForce GTX 660 vs AMD Radeon R9 390
VS
NVIDIA GeForce GTX 660
AMD Radeon R9 390
We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 8GB VRAM Radeon R9 390 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 275W)
AMD Radeon R9 390 's Advantages
Released 2 years and 9 months late
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (384.0GB/s vs 144.2GB/s)
1600 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GTX 660
1.981 TFLOPS
Radeon R9 390
+158%
5.12 TFLOPS
3DMark Time Spy
GeForce GTX 660
1308
Radeon R9 390
+202%
3953
GeForce GTX 660
VS
Radeon R9 390
Graphics Card
Sep 2012
Release Date
Jun 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
1500 MHz
Memory
2GB
Memory Size
8GB
GDDR5
Memory Type
GDDR5
192bit
Memory Bus
512bit
144.2GB/s
Bandwidth
384.0GB/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
GK106
GPU Name
Grenada
GK106-400-A1
GPU Variant
Grenada PRO (215-0880030)
Kepler
Architecture
GCN 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.54 billion
Transistors
6.2 billion
221 mm²
Die Size
438 mm²
Board Design
140W
TDP
275W
300 W
Suggested PSU
600 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
1x 6-pin + 1x 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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