Home GPU Comparison NVIDIA GeForce GTX 660 vs AMD Radeon HD 7950 Boost

NVIDIA GeForce GTX 660 vs AMD Radeon HD 7950 Boost

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 and 3GB VRAM Radeon HD 7950 Boost to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 's Advantages
Boost Clock has increased by 12% (1032MHz vs 925MHz)
Lower TDP (140W vs 200W)
AMD Radeon HD 7950 Boost 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (240.0GB/s vs 144.2GB/s)
832 additional rendering cores

Score

Benchmark

FP32 (float)
GeForce GTX 660
1.981 TFLOPS
Radeon HD 7950 Boost +67%
3.315 TFLOPS
VS

Graphics Card

Sep 2012
Release Date
Jun 2012
GeForce 600
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

980 MHz
Base Clock
850 MHz
1032 MHz
Boost Clock
925 MHz
1502 MHz
Memory Clock
1250 MHz

Memory

2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
192bit
Memory Bus
384bit
144.2GB/s
Bandwidth
240.0GB/s

Render Config

-
Compute Units
28
-
-
-
960
Shading Units
1792
80
TMUs
112
24
ROPs
32
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per CU)
384 KB
L2 Cache
768 KB
-
-
-

Theoretical Performance

20.64 GPixel/s
Pixel Rate
29.60 GPixel/s
82.56 GTexel/s
Texture Rate
103.6 GTexel/s
-
-
-
1.981 TFLOPS
FP32 (float)
3.315 TFLOPS
82.56 GFLOPS
FP64 (double)
828.8 GFLOPS

Board Design

140W
TDP
200W
300 W
Suggested PSU
550 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
1x 6-pin
Power Connectors
2x 6-pin

Graphics Processor

GK106
GPU Name
Tahiti
GK106-400-A1
GPU Variant
Tahiti PRO2 (215-0821282)
Kepler
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.54 billion
Transistors
4.313 billion
221 mm²
Die Size
352 mm²

Graphics Features

12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
3.0
OpenCL
1.2
1.1
Vulkan
1.2
3.0
CUDA
-
5.1
Shader Model
5.1

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