ATI Radeon HD 4580 vs AMD Radeon HD 6850 X2

VS

ATI Radeon HD 4580 AMD Radeon HD 6850 X2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4580 and 2GB VRAM Radeon HD 6850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4580 's Advantages

Lower TDP (65W vs 254W)

AMD Radeon HD 6850 X2 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 22.18GB/s)

840 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4580

0.191 TFLOPS

Radeon HD 6850 X2 +704%

1.536 TFLOPS

Radeon HD 4580

VS

Radeon HD 6850 X2

Graphics Card

Nov 2011

Release Date

Sep 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

-

693 MHz

Memory Clock

1050 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

22.18GB/s

Bandwidth

134.4GB/s

Render Config

-

SM Count

-

3

Compute Units

12

120

Shading Units

960

8

TMUs

48

4

ROPs

32

-

Tensor Cores

-

RT Cores

-

L1 Cache

8 KB (per CU)

128 KB

L2 Cache

512 KB

Theoretical Performance

3.184 GPixel/s

Pixel Rate

25.60 GPixel/s

6.368 GTexel/s

Texture Rate

38.40 GTexel/s

-

FP16 (half)

-

191.0 GFLOPS

FP32 (float)

1.536 TFLOPS

-

FP64 (double)

-

Graphics Processor

RV635

GPU Name

Barts

RV635 PRO (215-0682008)

GPU Variant

Barts PRO (215-0798006)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.378 billion

Transistors

1.7 billion

135 mm²

Die Size

255 mm²

Board Design

65W

TDP

254W

250 W

Suggested PSU

600 W

2x DVI 1x S-Video

Outputs

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

None

Power Connectors

2x 8-pin

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

N/A

OpenCL

1.2

N/A

Vulkan

N/A

-

CUDA

-

4.1

Shader Model

5.0

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