AMD Radeon HD 8490 OEM vs AMD Radeon HD 8870 OEM

VS

AMD Radeon HD 8490 OEM

AMD Radeon HD 8870 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 8490 OEM and 2GB VRAM Radeon HD 8870 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8490 OEM 's Advantages

Released 6 months late

Lower TDP (35W vs 175W)

AMD Radeon HD 8870 OEM 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (153.6GB/s vs 14.40GB/s)

1120 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8490 OEM

0.28 TFLOPS

Radeon HD 8870 OEM +814%

2.56 TFLOPS

Radeon HD 8490 OEM

VS

Radeon HD 8870 OEM

Graphics Card

Jul 2013

Release Date

Jan 2013

Sea Islands

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

900 MHz

Memory Clock

1200 MHz

Memory

1024MB

Memory Size

2GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

256bit

14.40GB/s

Bandwidth

153.6GB/s

Render Config

2

Compute Units

20

-

160

Shading Units

1280

8

TMUs

80

4

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

128 KB

L2 Cache

512 KB

-

Theoretical Performance

3.500 GPixel/s

Pixel Rate

32.00 GPixel/s

7.000 GTexel/s

Texture Rate

80.00 GTexel/s

-

280.0 GFLOPS

FP32 (float)

2.560 TFLOPS

-

FP64 (double)

160.0 GFLOPS

Board Design

35W

TDP

175W

200 W

Suggested PSU

450 W

1x DVI 1x DisplayPort 1.1

Outputs

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

None

Power Connectors

2x 6-pin

Graphics Processor

Caicos

GPU Name

Pitcairn

Caicos XTX

GPU Variant

Pitcairn XT (215-0828047)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.37 billion

Transistors

2.8 billion

67 mm²

Die Size

212 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

5.0

Shader Model

5.1

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