NVIDIA GeForce GTX 660 OEM vs ATI Radeon HD 2950 XTX

VS

NVIDIA GeForce GTX 660 OEM

ATI Radeon HD 2950 XTX

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 660 OEM and 512MB VRAM Radeon HD 2950 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 660 OEM 's Advantages

Boost Clock888MHz

More VRAM (1536GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 72.06GB/s)

832 additional rendering cores

ATI Radeon HD 2950 XTX 's Advantages

Lower TDP (110W vs 130W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 OEM +311%

2.046 TFLOPS

Radeon HD 2950 XTX

0.497 TFLOPS

GeForce GTX 660 OEM

VS

Radeon HD 2950 XTX

Graphics Card

Aug 2012

Release Date

Unknown

GeForce 600

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

823 MHz

Base Clock

-

888 MHz

Boost Clock

-

1400 MHz

Memory Clock

1126 MHz

Memory

1536MB

Memory Size

512MB

GDDR5

Memory Type

GDDR4

192bit

Memory Bus

256bit

134.4GB/s

Bandwidth

72.06GB/s

Render Config

-

Compute Units

4

-

1152

Shading Units

320

96

TMUs

16

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

-

384 KB

L2 Cache

256 KB

-

Theoretical Performance

21.31 GPixel/s

Pixel Rate

12.43 GPixel/s

85.25 GTexel/s

Texture Rate

12.43 GTexel/s

-

2.046 TFLOPS

FP32 (float)

497.3 GFLOPS

85.25 GFLOPS

FP64 (double)

99.46 GFLOPS

Board Design

130W

TDP

110W

300 W

Suggested PSU

300 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

GK104-200-KD-A2

GPU Variant

RV670 XTX (215-0708004)

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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