AMD Radeon HD 6870 1600SP Edition vs AMD Radeon HD 7790

VS

AMD Radeon HD 6870 1600SP Edition

AMD Radeon HD 7790

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 1600SP Edition and 1024MB VRAM Radeon HD 7790 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 1600SP Edition 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 96.00GB/s)

704 additional rendering cores

AMD Radeon HD 7790 's Advantages

Lower TDP (85W vs 175W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 1600SP Edition +51%

2.72 TFLOPS

Radeon HD 7790

1.792 TFLOPS

Radeon HD 6870 1600SP Edition

VS

Radeon HD 7790

Graphics Card

Jan 2013

Release Date

Mar 2013

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

96.00GB/s

Render Config

20

Compute Units

14

-

1600

Shading Units

896

80

TMUs

56

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

27.20 GPixel/s

Pixel Rate

16.00 GPixel/s

68.00 GTexel/s

Texture Rate

56.00 GTexel/s

-

2.720 TFLOPS

FP32 (float)

1.792 TFLOPS

544.0 GFLOPS

FP64 (double)

112.0 GFLOPS

Board Design

175W

TDP

85W

450 W

Suggested PSU

250 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

Cypress

GPU Name

Bonaire

Cypress XT (215-0735033)

GPU Variant

Bonaire XT (215-0839039)

TeraScale 2

Architecture

GCN 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

2.154 billion

Transistors

2.08 billion

334 mm²

Die Size

160 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (12_0)

4.4

OpenGL

4.6

1.2

OpenCL

2.0

N/A

Vulkan

1.2

-

5.0

Shader Model

6.3

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