NVIDIA GeForce GTX 480 vs ATI Radeon HD 4855

VS

NVIDIA GeForce GTX 480

ATI Radeon HD 4855

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 480 and 512MB VRAM Radeon HD 4855 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 480 's Advantages

More VRAM (1536GB vs 512GB)

Larger VRAM bandwidth (177.4GB/s vs 115.2GB/s)

ATI Radeon HD 4855 's Advantages

160 additional rendering cores

Lower TDP (110W vs 250W)

Score

Benchmark

FP32 (float)

GeForce GTX 480 +82%

1.345 TFLOPS

Radeon HD 4855

0.736 TFLOPS

GeForce GTX 480

VS

Radeon HD 4855

Graphics Card

Mar 2010

Release Date

Jan 2010

GeForce 400

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

924 MHz

Memory Clock

900 MHz

Memory

1536MB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

177.4GB/s

Bandwidth

115.2GB/s

Render Config

-

Compute Units

8

15

SM Count

-

480

Shading Units

640

60

TMUs

32

48

ROPs

16

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

21.03 GPixel/s

Pixel Rate

9.200 GPixel/s

42.06 GTexel/s

Texture Rate

18.40 GTexel/s

-

1345 GFLOPS

FP32 (float)

736.0 GFLOPS

168.1 GFLOPS

FP64 (double)

147.2 GFLOPS

Board Design

250W

TDP

110W

600 W

Suggested PSU

300 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

GF100

GPU Name

RV770

GF100-375-A3

GPU Variant

RV770 PRO (215-0669065)

Fermi

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

3.1 billion

Transistors

0.956 billion

529 mm²

Die Size

256 mm²

Graphics Features

12 (11_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

2.0

CUDA

-

5.1

Shader Model

4.1

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