AMD Radeon HD 8950 OEM vs AMD Radeon HD 6990

VS

AMD Radeon HD 8950 OEM

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 8950 OEM and 2GB VRAM Radeon HD 6990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8950 OEM 's Advantages

Released 1 years and 10 months late

Boost Clock925MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (240.0GB/s vs 160.0GB/s)

256 additional rendering cores

Lower TDP (200W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 8950 OEM +30%

3.315 TFLOPS

Radeon HD 6990

2.55 TFLOPS

Radeon HD 8950 OEM

VS

Radeon HD 6990

Graphics Card

Jan 2013

Release Date

Mar 2011

Sea Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

850 MHz

Base Clock

-

925 MHz

Boost Clock

-

1250 MHz

Memory Clock

1250 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

240.0GB/s

Bandwidth

160.0GB/s

Render Config

28

Compute Units

24

-

1792

Shading Units

1536

112

TMUs

96

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

26.56 GPixel/s

103.6 GTexel/s

Texture Rate

79.68 GTexel/s

-

3.315 TFLOPS

FP32 (float)

2.550 TFLOPS

828.8 GFLOPS

FP64 (double)

637.4 GFLOPS

Board Design

200W

TDP

375W

550 W

Suggested PSU

750 W

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

Outputs

1x DVI 4x mini-DisplayPort 1.2

2x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

Tahiti

GPU Name

Antilles

Tahiti PRO (215-0821056)

GPU Variant

Antilles XT (215-0807027)

GCN 1.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

2.64 billion

352 mm²

Die Size

389 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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