AMD Radeon HD 6870 X2 vs AMD Radeon R7 250 OEM

VS

AMD Radeon HD 6870 X2

AMD Radeon R7 250 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 2GB VRAM Radeon R7 250 OEM 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 32.00GB/s)

736 additional rendering cores

AMD Radeon R7 250 OEM 's Advantages

Released 2 years and 3 months late

Boost Clock1050MHz

More VRAM (2GB vs 1024GB)

Lower TDP (65W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +150%

2.016 TFLOPS

Radeon R7 250 OEM

0.806 TFLOPS

Radeon HD 6870 X2

VS

Radeon R7 250 OEM

Graphics Card

Jul 2011

Release Date

Oct 2013

Northern Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

1000 MHz

-

Boost Clock

1050 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

32.00GB/s

Render Config

14

Compute Units

6

-

1120

Shading Units

384

56

TMUs

24

32

ROPs

8

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

8.400 GPixel/s

50.40 GTexel/s

Texture Rate

25.20 GTexel/s

-

2.016 TFLOPS

FP32 (float)

806.4 GFLOPS

-

FP64 (double)

50.40 GFLOPS

Board Design

300W

TDP

65W

700 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

-

Power Connectors

None

Graphics Processor

Barts

GPU Name

Oland

Barts XT (215-0798000)

GPU Variant

Oland XT (215-0837000)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

0.95 billion

255 mm²

Die Size

77 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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