NVIDIA GeForce GTX 660 OEM vs AMD Radeon R9 M485X
GPU · Specs Compare
Graphics Card
Release Date
Aug 2012
May 2016
Generation
GeForce 600
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
MXM-B (3.0)
Clock Speeds
Base Clock
823 MHz
—
Boost Clock
888 MHz
—
Memory Clock
1400 MHz
1250 MHz
Memory
Memory Size
1536MB
8GB
Memory Type
GDDR5
GDDR5
Memory Bus
192bit
256bit
Bandwidth
134.4GB/s
160.0GB/s
Render Config
Shading Units
1152
2048
TMUs
96
128
ROPs
24
32
L1 Cache
16 KB (per SMX)
16 KB (per CU)
L2 Cache
384 KB
512 KB
Compute Units
—
32
Theoretical Performance
Pixel Rate
21.31 GPixel/s
23.14 GPixel/s
Texture Rate
85.25 GTexel/s
92.54 GTexel/s
FP32 (float)
2.046 TFLOPS
2.961 TFLOPS
FP64 (double)
85.25 GFLOPS
185.1 GFLOPS
FP16 (half)
—
2.961 TFLOPS
Graphics Processor
GPU Name
GK104
Amethyst
GPU Variant
GK104-200-KD-A2
Amethyst XT
Architecture
Kepler
GCN 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
3.54 billion
5 billion
Die Size
294 mm²
366 mm²
Board Design
TDP
130W
250W
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 (12_0)
OpenGL
4.6
4.6
OpenCL
3.0
2.0
Vulkan
1.1
1.2
CUDA
3.0
—
Shader Model
5.1
6.3
Benchmark
3DMark Time Spy
1,194
—
3DMark Time Spy Extreme
260
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.