AMD Radeon HD 6990 vs AMD Radeon HD 6790

VS

AMD Radeon HD 6990

AMD Radeon HD 6790

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 1024MB VRAM Radeon HD 6790 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)

736 additional rendering cores

AMD Radeon HD 6790 's Advantages

Lower TDP (150W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990 +89%

2.55 TFLOPS

Radeon HD 6790

1.344 TFLOPS

Radeon HD 6990

VS

Radeon HD 6790

Graphics Card

Mar 2011

Release Date

Apr 2011

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

10

-

1536

Shading Units

800

96

TMUs

40

32

ROPs

16

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

13.44 GPixel/s

79.68 GTexel/s

Texture Rate

33.60 GTexel/s

-

2.550 TFLOPS

FP32 (float)

1344 GFLOPS

637.4 GFLOPS

FP64 (double)

-

Board Design

375W

TDP

150W

750 W

Suggested PSU

450 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

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

2x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Antilles

GPU Name

Barts

Antilles XT (215-0807027)

GPU Variant

Barts LE (215-0798002)

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

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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