NVIDIA GeForce GTX 660 Rev. 2 vs ATI Radeon HD 2950 PRO

VS

NVIDIA GeForce GTX 660 Rev. 2

ATI Radeon HD 2950 PRO

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 256MB VRAM Radeon HD 2950 PRO 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

Boost Clock1032MHz

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (144.2GB/s vs 38.40GB/s)

640 additional rendering cores

ATI Radeon HD 2950 PRO 's Advantages

Lower TDP (75W vs 140W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2 +415%

1.981 TFLOPS

Radeon HD 2950 PRO

0.384 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon HD 2950 PRO

Graphics Card

Sep 2014

Release Date

Unknown

GeForce 600

Generation

Radeon R600

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

600 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

38.40GB/s

Render Config

-

Compute Units

4

-

960

Shading Units

320

80

TMUs

16

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

-

384 KB

L2 Cache

256 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

9.600 GPixel/s

82.56 GTexel/s

Texture Rate

9.600 GTexel/s

-

1.981 TFLOPS

FP32 (float)

384.0 GFLOPS

82.56 GFLOPS

FP64 (double)

76.80 GFLOPS

Board Design

140W

TDP

75W

300 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x S-Video

1x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

GK104

GPU Name

RV670

-

GPU Variant

RV670 PRO ES (215-0708001)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

3.54 billion

Transistors

0.666 billion

294 mm²

Die Size

192 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

3.0

OpenCL

N/A

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

4.1

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