AMD Radeon HD 6990 vs NVIDIA GeForce GTX 1080

VS

AMD Radeon HD 6990

NVIDIA GeForce GTX 1080

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 8GB VRAM GeForce GTX 1080 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 1080 's Advantages

Released 5 years and 2 months late

Boost Clock1733MHz

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (320.3GB/s vs 160.0GB/s)

1024 additional rendering cores

Lower TDP (180W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990

2.55 TFLOPS

GeForce GTX 1080 +247%

8.873 TFLOPS

Radeon HD 6990

VS

GeForce GTX 1080

Graphics Card

Mar 2011

Release Date

May 2016

Northern Islands

Generation

GeForce 10

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1607 MHz

-

Boost Clock

1733 MHz

1250 MHz

Memory Clock

1251 MHz

Memory

2GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5X

256bit

Memory Bus

256bit

160.0GB/s

Bandwidth

320.3GB/s

Render Config

24

Compute Units

-

SM Count

20

1536

Shading Units

2560

96

TMUs

160

32

ROPs

64

-

8 KB (per CU)

L1 Cache

48 KB (per SM)

512 KB

L2 Cache

2 MB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

110.9 GPixel/s

79.68 GTexel/s

Texture Rate

277.3 GTexel/s

-

FP16 (half)

138.6 GFLOPS

2.550 TFLOPS

FP32 (float)

8.873 TFLOPS

637.4 GFLOPS

FP64 (double)

277.3 GFLOPS

Board Design

375W

TDP

180W

750 W

Suggested PSU

450 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x DVI 1x HDMI 2.0 3x DisplayPort 1.4a

2x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

Antilles

GPU Name

GP104

Antilles XT (215-0807027)

GPU Variant

GP104-400-A1

TeraScale 3

Architecture

Pascal

TSMC

Foundry

TSMC

40 nm

Process Size

16 nm

2.64 billion

Transistors

7.2 billion

389 mm²

Die Size

314 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (12_1)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.3

-

CUDA

6.1

5.0

Shader Model

6.4

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