NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon HD 6950

VS

NVIDIA GeForce GTX 660 Rev. 2 AMD Radeon HD 6950

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 2GB VRAM Radeon HD 6950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Released 3 years and 9 months late

Boost Clock1032MHz

Lower TDP (140W vs 200W)

AMD Radeon HD 6950 's Advantages

Larger VRAM bandwidth (160.0GB/s vs 144.2GB/s)

448 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2

1.981 TFLOPS

Radeon HD 6950 +13%

2.253 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon HD 6950

Graphics Card

Sep 2014

Release Date

Dec 2010

GeForce 600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

980 MHz

Base Clock

-

1032 MHz

Boost Clock

-

1502 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

160.0GB/s

Render Config

-

SM Count

-

Compute Units

22

960

Shading Units

1408

80

TMUs

88

24

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

512 KB

Theoretical Performance

20.64 GPixel/s

Pixel Rate

25.60 GPixel/s

82.56 GTexel/s

Texture Rate

70.40 GTexel/s

-

FP16 (half)

-

1.981 TFLOPS

FP32 (float)

2.253 TFLOPS

82.56 GFLOPS

FP64 (double)

563.2 GFLOPS

Graphics Processor

GK104

GPU Name

Cayman

-

GPU Variant

Cayman PRO (215-0807019)

Kepler

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

3.54 billion

Transistors

2.64 billion

294 mm²

Die Size

389 mm²

Board Design

140W

TDP

200W

300 W

Suggested PSU

550 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

1x 6-pin

Power Connectors

2x 6-pin

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

5.0

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