ATI Radeon HD 4870 Mac Edition vs ATI Radeon HD 5450 PCI

VS

ATI Radeon HD 4870 Mac Edition

ATI Radeon HD 5450 PCI

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 512MB VRAM Radeon HD 5450 PCI 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 5.328GB/s)

720 additional rendering cores

ATI Radeon HD 5450 PCI 's Advantages

Released 1 years and 1 months late

Lower TDP (19W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 Mac Edition +1053%

1.2 TFLOPS

Radeon HD 5450 PCI

0.104 TFLOPS

Radeon HD 4870 Mac Edition

VS

Radeon HD 5450 PCI

Graphics Card

Jan 2009

Release Date

Feb 2010

Radeon R700

Generation

Evergreen

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCI

Clock Speeds

-

850 MHz

Memory Clock

333 MHz

Memory

512MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

64bit

108.8GB/s

Bandwidth

5.328GB/s

Render Config

10

Compute Units

2

-

800

Shading Units

80

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

2.600 GPixel/s

30.00 GTexel/s

Texture Rate

5.200 GTexel/s

-

1200 GFLOPS

FP32 (float)

104.0 GFLOPS

240.0 GFLOPS

FP64 (double)

-

Board Design

150W

TDP

19W

450 W

Suggested PSU

200 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

1x DVI 1x HDMI 1.3a

2x 6-pin

Power Connectors

None

Graphics Processor

RV770

GPU Name

Cedar

RV770 XT Mac (215-0669080)

GPU Variant

Cedar PRO

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

0.292 billion

256 mm²

Die Size

59 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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