AMD Radeon HD 6870 X2 vs AMD Radeon HD 7950 Boost

VS

AMD Radeon HD 6870 X2 AMD Radeon HD 7950 Boost

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 3GB VRAM Radeon HD 7950 Boost to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7950 Boost 's Advantages

Released 11 months late

Boost Clock925MHz

More VRAM (3GB vs 1GB)

Larger VRAM bandwidth (240.0GB/s vs 134.4GB/s)

672 additional rendering cores

Lower TDP (200W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2

2.016 TFLOPS

Radeon HD 7950 Boost +64%

3.315 TFLOPS

Radeon HD 6870 X2

VS

Radeon HD 7950 Boost

Graphics Card

Jul 2011

Release Date

Jun 2012

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

850 MHz

-

Boost Clock

925 MHz

1050 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

134.4GB/s

Bandwidth

240.0GB/s

Render Config

-

SM Count

-

14

Compute Units

28

1120

Shading Units

1792

56

TMUs

112

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

Theoretical Performance

28.80 GPixel/s

Pixel Rate

29.60 GPixel/s

50.40 GTexel/s

Texture Rate

103.6 GTexel/s

-

FP16 (half)

-

2.016 TFLOPS

FP32 (float)

3.315 TFLOPS

-

FP64 (double)

828.8 GFLOPS

Graphics Processor

Barts

GPU Name

Tahiti

Barts XT (215-0798000)

GPU Variant

Tahiti PRO2 (215-0821282)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

4.313 billion

255 mm²

Die Size

352 mm²

Board Design

300W

TDP

200W

700 W

Suggested PSU

550 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

2x 6-pin

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

-

CUDA

-

5.0

Shader Model

5.1

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