AMD Radeon HD 8870 OEM vs AMD Radeon HD 6450

VS

AMD Radeon HD 8870 OEM

AMD Radeon HD 6450

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 8870 OEM and 512MB VRAM Radeon HD 6450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8870 OEM 's Advantages

Released 1 years and 9 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (153.6GB/s vs 25.60GB/s)

1120 additional rendering cores

AMD Radeon HD 6450 's Advantages

Lower TDP (18W vs 175W)

Score

Benchmark

FP32 (float)

Radeon HD 8870 OEM +1180%

2.56 TFLOPS

Radeon HD 6450

0.2 TFLOPS

Radeon HD 8870 OEM

VS

Radeon HD 6450

Graphics Card

Jan 2013

Release Date

Apr 2011

Sea Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

153.6GB/s

Bandwidth

25.60GB/s

Render Config

20

Compute Units

2

-

1280

Shading Units

160

80

TMUs

8

32

ROPs

4

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

2.500 GPixel/s

80.00 GTexel/s

Texture Rate

5.000 GTexel/s

-

2.560 TFLOPS

FP32 (float)

200.0 GFLOPS

160.0 GFLOPS

FP64 (double)

-

Board Design

175W

TDP

18W

450 W

Suggested PSU

200 W

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

2x 6-pin

Power Connectors

None

Graphics Processor

Pitcairn

GPU Name

Caicos

Pitcairn XT (215-0828047)

GPU Variant

Caicos PRO

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.8 billion

Transistors

0.37 billion

212 mm²

Die Size

67 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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