AMD Radeon HD 6870 X2 vs AMD Radeon HD 7790

VS

AMD Radeon HD 6870 X2

AMD Radeon HD 7790

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 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 X2 's Advantages

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

224 additional rendering cores

AMD Radeon HD 7790 's Advantages

Released 1 years and 8 months late

Lower TDP (85W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +12%

2.016 TFLOPS

Radeon HD 7790

1.792 TFLOPS

Radeon HD 6870 X2

VS

Radeon HD 7790

Graphics Card

Jul 2011

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

14

Compute Units

14

-

1120

Shading Units

896

56

TMUs

56

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

16.00 GPixel/s

50.40 GTexel/s

Texture Rate

56.00 GTexel/s

-

2.016 TFLOPS

FP32 (float)

1.792 TFLOPS

-

FP64 (double)

112.0 GFLOPS

Board Design

300W

TDP

85W

700 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

-

Power Connectors

1x 6-pin

Graphics Processor

Barts

GPU Name

Bonaire

Barts XT (215-0798000)

GPU Variant

Bonaire XT (215-0839039)

TeraScale 2

Architecture

GCN 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

2.08 billion

255 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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