ATI Radeon HD 4855 vs AMD Radeon HD 6750

VS

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4855 and 1024MB VRAM Radeon HD 6750 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4855 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 73.60GB/s)

AMD Radeon HD 6750 's Advantages

Released 1 years late

More VRAM (1024GB vs 512GB)

80 additional rendering cores

Lower TDP (86W vs 110W)

Score

Benchmark

FP32 (float)

Radeon HD 4855

0.736 TFLOPS

Radeon HD 6750 +36%

1.008 TFLOPS

Radeon HD 4855

VS

Radeon HD 6750

Graphics Card

Jan 2010

Release Date

Jan 2011

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

900 MHz

Memory Clock

1150 MHz

Memory

512MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

115.2GB/s

Bandwidth

73.60GB/s

Render Config

-

SM Count

-

8

Compute Units

9

640

Shading Units

720

32

TMUs

36

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

Theoretical Performance

9.200 GPixel/s

Pixel Rate

11.20 GPixel/s

18.40 GTexel/s

Texture Rate

25.20 GTexel/s

-

FP16 (half)

-

736.0 GFLOPS

FP32 (float)

1008 GFLOPS

147.2 GFLOPS

FP64 (double)

-

Graphics Processor

RV770

GPU Name

Juniper

RV770 PRO (215-0669065)

GPU Variant

Juniper LE (215-0754009)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

1.04 billion

256 mm²

Die Size

166 mm²

Board Design

110W

TDP

86W

300 W

Suggested PSU

250 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

1x 6-pin

Power Connectors

1x 6-pin

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

CUDA

-

4.1

Shader Model

5.0

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