NVIDIA GeForce GTX 660 vs AMD Radeon R9 M390 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Sep 2012
May 2015
Generation
GeForce 600
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
980 MHz
-
Boost Clock
1032 MHz
-
Memory Clock
1502 MHz
1365 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
192bit
256bit
Bandwidth
144.2GB/s
174.7GB/s
Render Config
Shading Units
960
1024
TMUs
80
64
ROPs
24
32
L1 Cache
16 KB (per SMX)
16 KB (per CU)
L2 Cache
384 KB
512 KB
Compute Units
-
16
Theoretical Performance
Pixel Rate
20.64 GPixel/s
30.66 GPixel/s
Texture Rate
82.56 GTexel/s
61.31 GTexel/s
FP32 (float)
1.981 TFLOPS
1.962 TFLOPS
FP64 (double)
82.56 GFLOPS
122.6 GFLOPS
Graphics Processor
GPU Name
GK106
Pitcairn
GPU Variant
GK106-400-A1
Pitcairn PRO(215-0828062)
Architecture
Kepler
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.54 billion
2.8 billion
Die Size
221 mm²
212 mm²
Board Design
TDP
140W
80W
Suggested PSU
300 W
-
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
No outputs
Power Connectors
1x 6-pin
None
Graphics Features
DirectX
12 (11_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
3.0
1.2
Vulkan
1.1
1.2
CUDA
3.0
-
Shader Model
5.1
5.1
📊 Benchmark
3DMark Time Spy
1,194
-
3DMark Time Spy Extreme
260
-
OctaneBench
27
-
Blender
111
-