ATI Radeon HD 4870 Mac Edition vs AMD Radeon HD 8450 OEM

VS

ATI Radeon HD 4870 Mac Edition

AMD Radeon HD 8450 OEM

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 1024MB VRAM Radeon HD 8450 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 Mac Edition 's Advantages

Larger VRAM bandwidth (108.8GB/s vs 10.67GB/s)

640 additional rendering cores

AMD Radeon HD 8450 OEM 's Advantages

Released 4 years late

More VRAM (1024GB vs 512GB)

Lower TDP (18W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 Mac Edition +500%

1.2 TFLOPS

Radeon HD 8450 OEM

0.2 TFLOPS

Radeon HD 4870 Mac Edition

VS

Radeon HD 8450 OEM

Graphics Card

Jan 2009

Release Date

Jan 2013

Radeon R700

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

850 MHz

Memory Clock

667 MHz

Memory

512MB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

64bit

108.8GB/s

Bandwidth

10.67GB/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

150W

TDP

18W

450 W

Suggested PSU

200 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

2x 6-pin

Power Connectors

None

Graphics Processor

RV770

GPU Name

Caicos

RV770 XT Mac (215-0669080)

GPU Variant

Caicos PRO-L

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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