NVIDIA GeForce GTX 1080 vs AMD Radeon HD 6990

VS

NVIDIA GeForce GTX 1080

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 8GB VRAM GeForce GTX 1080 and 2GB VRAM Radeon HD 6990 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)

GeForce GTX 1080 +247%

8.873 TFLOPS

Radeon HD 6990

2.55 TFLOPS

GeForce GTX 1080

VS

Radeon HD 6990

Graphics Card

May 2016

Release Date

Mar 2011

GeForce 10

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1607 MHz

Base Clock

-

1733 MHz

Boost Clock

-

1251 MHz

Memory Clock

1250 MHz

Memory

8GB

Memory Size

2GB

GDDR5X

Memory Type

GDDR5

256bit

Memory Bus

256bit

320.3GB/s

Bandwidth

160.0GB/s

Render Config

-

Compute Units

24

20

SM Count

-

2560

Shading Units

1536

160

TMUs

96

64

ROPs

32

-

48 KB (per SM)

L1 Cache

8 KB (per CU)

2 MB

L2 Cache

512 KB

-

Theoretical Performance

110.9 GPixel/s

Pixel Rate

26.56 GPixel/s

277.3 GTexel/s

Texture Rate

79.68 GTexel/s

138.6 GFLOPS

FP16 (half)

-

8.873 TFLOPS

FP32 (float)

2.550 TFLOPS

277.3 GFLOPS

FP64 (double)

637.4 GFLOPS

Board Design

180W

TDP

375W

450 W

Suggested PSU

750 W

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

Outputs

1x DVI 4x mini-DisplayPort 1.2

1x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

GP104

GPU Name

Antilles

GP104-400-A1

GPU Variant

Antilles XT (215-0807027)

Pascal

Architecture

TeraScale 3

TSMC

Foundry

TSMC

16 nm

Process Size

40 nm

7.2 billion

Transistors

2.64 billion

314 mm²

Die Size

389 mm²

Graphics Features

12 (12_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.3

Vulkan

N/A

6.1

CUDA

-

6.4

Shader Model

5.0

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