NVIDIA GeForce GTX 660 Rev. 2 vs ATI Radeon HD 4850 X2

VS

NVIDIA GeForce GTX 660 Rev. 2

ATI Radeon HD 4850 X2

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Rev. 2 and 512MB VRAM Radeon HD 4850 X2 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 5 years and 10 months late

Boost Clock1032MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (144.2GB/s vs 63.68GB/s)

160 additional rendering cores

Lower TDP (140W vs 250W)

Score

Benchmark

FP32 (float)

GeForce GTX 660 Rev. 2 +98%

1.981 TFLOPS

Radeon HD 4850 X2

1 TFLOPS

GeForce GTX 660 Rev. 2

VS

Radeon HD 4850 X2

Graphics Card

Sep 2014

Release Date

Nov 2008

GeForce 600

Generation

Radeon R700

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

995 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

192bit

Memory Bus

256bit

144.2GB/s

Bandwidth

63.68GB/s

Render Config

-

Compute Units

10

-

960

Shading Units

800

80

TMUs

40

24

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

20.64 GPixel/s

Pixel Rate

10.00 GPixel/s

82.56 GTexel/s

Texture Rate

25.00 GTexel/s

-

1.981 TFLOPS

FP32 (float)

1000 GFLOPS

82.56 GFLOPS

FP64 (double)

200.0 GFLOPS

Board Design

140W

TDP

250W

300 W

Suggested PSU

600 W

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

Outputs

4x DVI 1x S-Video

1x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GK104

GPU Name

R700

-

GPU Variant

R700 PRO (215-0669065)

Kepler

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

3.54 billion

Transistors

0.956 billion

294 mm²

Die Size

256 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

3.0

OpenCL

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

4.1

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