AMD Radeon HD 6990 vs AMD Radeon HD 6870 1600SP Edition

VS

AMD Radeon HD 6990

AMD Radeon HD 6870 1600SP Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 1024MB VRAM Radeon HD 6870 1600SP Edition 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 1024GB)

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

AMD Radeon HD 6870 1600SP Edition 's Advantages

Released 1 years and 10 months late

64 additional rendering cores

Lower TDP (175W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990

2.55 TFLOPS

Radeon HD 6870 1600SP Edition +6%

2.72 TFLOPS

Radeon HD 6990

VS

Radeon HD 6870 1600SP Edition

Graphics Card

Mar 2011

Release Date

Jan 2013

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

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

24

Compute Units

20

-

1536

Shading Units

1600

96

TMUs

80

32

ROPs

32

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

27.20 GPixel/s

79.68 GTexel/s

Texture Rate

68.00 GTexel/s

-

2.550 TFLOPS

FP32 (float)

2.720 TFLOPS

637.4 GFLOPS

FP64 (double)

544.0 GFLOPS

Board Design

375W

TDP

175W

750 W

Suggested PSU

450 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

2x 6-pin

Graphics Processor

Antilles

GPU Name

Cypress

Antilles XT (215-0807027)

GPU Variant

Cypress XT (215-0735033)

TeraScale 3

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

2.64 billion

Transistors

2.154 billion

389 mm²

Die Size

334 mm²

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

-

5.0

Shader Model

5.0

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