AMD Radeon HD 6990 vs AMD Radeon HD 6870 X2

VS

AMD Radeon HD 6990 AMD Radeon HD 6870 X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 1024MB VRAM Radeon HD 6870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990 's Advantages

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (160.0GB/s vs 134.4GB/s)

416 additional rendering cores

AMD Radeon HD 6870 X2 's Advantages

Lower TDP (300W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990 +26%

2.55 TFLOPS

Radeon HD 6870 X2

2.016 TFLOPS

Radeon HD 6990

VS

Radeon HD 6870 X2

Graphics Card

Mar 2011

Release Date

Jul 2011

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1250 MHz

Memory Clock

1050 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

160.0GB/s

Bandwidth

134.4GB/s

Render Config

-

SM Count

-

24

Compute Units

14

1536

Shading Units

1120

96

TMUs

56

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

Theoretical Performance

26.56 GPixel/s

Pixel Rate

28.80 GPixel/s

79.68 GTexel/s

Texture Rate

50.40 GTexel/s

-

FP16 (half)

-

2.550 TFLOPS

FP32 (float)

2.016 TFLOPS

637.4 GFLOPS

FP64 (double)

-

Graphics Processor

Antilles

GPU Name

Barts

Antilles XT (215-0807027)

GPU Variant

Barts XT (215-0798000)

TeraScale 3

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

2.64 billion

Transistors

1.7 billion

389 mm²

Die Size

255 mm²

Board Design

375W

TDP

300W

750 W

Suggested PSU

700 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

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

2x 8-pin

Power Connectors

-

Graphics Features

11.2 (11_0)

DirectX

11.2 (11_0)

4.4

OpenGL

4.4

1.2

OpenCL

1.2

N/A

Vulkan

N/A

-

CUDA

-

5.0

Shader Model

5.0

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