NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon R9 M290X
GPU Specs Compare
Graphics Card
Release Date
Sep 2014
Jan 2014
Generation
GeForce 600
Gem System
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
980 MHz
850 MHz
Boost Clock
1032 MHz
900 MHz
Memory Clock
1502 MHz
1200 MHz
Memory
Memory Size
2GB
4GB
Memory Type
GDDR5
GDDR5
Memory Bus
192bit
256bit
Bandwidth
144.2GB/s
153.6GB/s
Render Config
Shading Units
960
1280
TMUs
80
80
ROPs
24
32
L1 Cache
16 KB (per SMX)
16 KB (per CU)
L2 Cache
384 KB
512 KB
Compute Units
-
20
Theoretical Performance
Pixel Rate
20.64 GPixel/s
28.80 GPixel/s
Texture Rate
82.56 GTexel/s
72.00 GTexel/s
FP32 (float)
1.981 TFLOPS
2.304 TFLOPS
FP64 (double)
82.56 GFLOPS
144.0 GFLOPS
Graphics Processor
GPU Name
GK104
Neptune
Architecture
Kepler
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
3.54 billion
2.8 billion
Die Size
294 mm²
212 mm²
GPU Variant
-
Neptune XT(216-0847000)
Board Design
TDP
140W
100W
Suggested PSU
300 W
-
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Portable Device Dependent
Power Connectors
1x 6-pin
None
Graphics Features
DirectX
12 (11_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
3.0
2.1 (1.2)
Vulkan
1.1
1.2.170
CUDA
3.0
-
Shader Model
5.1
6.5 (5.1)