ATI Radeon HD 4870 X2 vs AMD Radeon HD 6450 OEM

VS

ATI Radeon HD 4870 X2

AMD Radeon HD 6450 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 512MB VRAM Radeon HD 6450 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 X2 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (115.2GB/s vs 8.528GB/s)

640 additional rendering cores

AMD Radeon HD 6450 OEM 's Advantages

Released 2 years and 6 months late

Lower TDP (18W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2 +500%

1.2 TFLOPS

Radeon HD 6450 OEM

0.2 TFLOPS

Radeon HD 4870 X2

VS

Radeon HD 6450 OEM

Graphics Card

Aug 2008

Release Date

Feb 2011

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

533 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

64bit

115.2GB/s

Bandwidth

8.528GB/s

Render Config

10

Compute Units

2

-

800

Shading Units

160

40

TMUs

8

16

ROPs

4

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

2.500 GPixel/s

30.00 GTexel/s

Texture Rate

5.000 GTexel/s

-

1200 GFLOPS

FP32 (float)

200.0 GFLOPS

240.0 GFLOPS

FP64 (double)

-

Board Design

286W

TDP

18W

600 W

Suggested PSU

200 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

R700

GPU Name

Caicos

R700 XT (215-0669045)

GPU Variant

Junbonator

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

0.37 billion

256 mm²

Die Size

67 mm²

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

-

4.1

Shader Model

5.0

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