AMD Radeon HD 8770 OEM vs AMD Radeon HD 7870 GHz Edition

VS

AMD Radeon HD 8770 OEM

AMD Radeon HD 7870 GHz Edition

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 8770 OEM and 2GB VRAM Radeon HD 7870 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8770 OEM 's Advantages

Released 1 years and 6 months late

Lower TDP (85W vs 175W)

AMD Radeon HD 7870 GHz Edition 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (153.6GB/s vs 96.00GB/s)

384 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8770 OEM

1.882 TFLOPS

Radeon HD 7870 GHz Edition +36%

2.56 TFLOPS

Radeon HD 8770 OEM

VS

Radeon HD 7870 GHz Edition

Graphics Card

Sep 2013

Release Date

Mar 2012

Sea Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1500 MHz

Memory Clock

1200 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

96.00GB/s

Bandwidth

153.6GB/s

Render Config

14

Compute Units

20

-

896

Shading Units

1280

56

TMUs

80

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

16.80 GPixel/s

Pixel Rate

32.00 GPixel/s

58.80 GTexel/s

Texture Rate

80.00 GTexel/s

-

1.882 TFLOPS

FP32 (float)

2.560 TFLOPS

117.6 GFLOPS

FP64 (double)

160.0 GFLOPS

Board Design

85W

TDP

175W

250 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

Bonaire

GPU Name

Pitcairn

Bonaire XT (215-0839039)

GPU Variant

Pitcairn XT (215-0828047)

GCN 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.08 billion

Transistors

2.8 billion

160 mm²

Die Size

212 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.0

OpenCL

1.2

Vulkan

1.2

-

6.3

Shader Model

5.1

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