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

VS

ATI Radeon HD 4850

NVIDIA GeForce GTX 660 Rev. 2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4850 and 2GB VRAM GeForce GTX 660 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4850 's Advantages

Lower TDP (110W vs 140W)

NVIDIA GeForce GTX 660 Rev. 2 's Advantages

Released 6 years and 3 months late

Boost Clock1032MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (144.2GB/s vs 63.55GB/s)

160 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4850

1 TFLOPS

GeForce GTX 660 Rev. 2 +98%

1.981 TFLOPS

Radeon HD 4850

VS

GeForce GTX 660 Rev. 2

Graphics Card

Jun 2008

Release Date

Sep 2014

Radeon R700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

980 MHz

-

Boost Clock

1032 MHz

993 MHz

Memory Clock

1502 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

192bit

63.55GB/s

Bandwidth

144.2GB/s

Render Config

10

Compute Units

-

800

Shading Units

960

40

TMUs

80

16

ROPs

24

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

384 KB

-

Theoretical Performance

10.00 GPixel/s

Pixel Rate

20.64 GPixel/s

25.00 GTexel/s

Texture Rate

82.56 GTexel/s

-

1000 GFLOPS

FP32 (float)

1.981 TFLOPS

200.0 GFLOPS

FP64 (double)

82.56 GFLOPS

Board Design

110W

TDP

140W

300 W

Suggested PSU

300 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

RV770

GPU Name

GK104

RV770 PRO (215-0669065)

GPU Variant

-

TeraScale

Architecture

Kepler

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.956 billion

Transistors

3.54 billion

256 mm²

Die Size

294 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

4.1

Shader Model

5.1

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