AMD Radeon HD 6990 vs AMD Radeon Sky 500

VS

AMD Radeon HD 6990

AMD Radeon Sky 500

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 4GB VRAM Radeon Sky 500 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990 's Advantages

Larger VRAM bandwidth (160.0GB/s vs 153.6GB/s)

256 additional rendering cores

AMD Radeon Sky 500 's Advantages

Released 2 years late

More VRAM (4GB vs 2GB)

Lower TDP (150W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990 +4%

2.55 TFLOPS

Radeon Sky 500

2.432 TFLOPS

Radeon HD 6990

VS

Radeon Sky 500

Graphics Card

Mar 2011

Release Date

Mar 2013

Northern Islands

Generation

Radeon Sky

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

1200 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

160.0GB/s

Bandwidth

153.6GB/s

Render Config

24

Compute Units

20

-

1536

Shading Units

1280

96

TMUs

80

32

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

30.40 GPixel/s

79.68 GTexel/s

Texture Rate

76.00 GTexel/s

-

2.550 TFLOPS

FP32 (float)

2.432 TFLOPS

637.4 GFLOPS

FP64 (double)

152.0 GFLOPS

Board Design

375W

TDP

150W

750 W

Suggested PSU

450 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x DisplayPort 1.2

2x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Antilles

GPU Name

Pitcairn

Antilles XT (215-0807027)

GPU Variant

Pitcairn XT GL (215-0828073)

TeraScale 3

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

2.64 billion

Transistors

2.8 billion

389 mm²

Die Size

212 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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