NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon PRO W7900D
GPU · Specs Compare
Graphics Card
Release Date
Sep 2014
Nov 2025
Generation
GeForce 600
Radeon Pro Navi
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
980 MHz
1327 MHz
Boost Clock
1032 MHz
2156 MHz
Memory Clock
1502 MHz
2250 MHz
Memory
Memory Size
2GB
48GB
Memory Type
GDDR5
GDDR6
Memory Bus
192bit
384bit
Bandwidth
144.2GB/s
864.0GB/s
Render Config
Shading Units
960
6144
TMUs
80
384
ROPs
24
192
L1 Cache
16 KB (per SMX)
256 KB per Array
L2 Cache
384 KB
6 MB
Compute Units
—
96
RT Cores
—
96
L3 Cache
—
96 MB
Theoretical Performance
Pixel Rate
20.64 GPixel/s
414.0 GPixel/s
Texture Rate
82.56 GTexel/s
827.9 GTexel/s
FP32 (float)
1.981 TFLOPS
52.99 TFLOPS
FP64 (double)
82.56 GFLOPS
1.656 TFLOPS
FP16 (half)
—
106.0 TFLOPS
Graphics Processor
GPU Name
GK104
Navi 31
Architecture
Kepler
RDNA 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
5 nm
Transistors
3.54 billion
57.7 billion
Die Size
294 mm²
529 mm²
GPU Variant
—
Navi 31
Board Design
TDP
140W
295W
Suggested PSU
300 W
600 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
3x DisplayPort 2.11x mini-DisplayPort 2.1
Power Connectors
1x 6-pin
2x 8-pin
Graphics Features
DirectX
12 (11_0)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
3.0
2.2
Vulkan
1.1
1.4
CUDA
3.0
—
Shader Model
5.1
6.9
▲ Specs Compare
Data sourced from official specifications and benchmark tests.