NVIDIA GeForce GTX 980 vs AMD Radeon HD 6950

VS

NVIDIA GeForce GTX 980

AMD Radeon HD 6950

We compared two Desktop platform GPUs: 4GB VRAM GeForce GTX 980 and 2GB VRAM Radeon HD 6950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 980 's Advantages

Released 3 years and 9 months late

Boost Clock1216MHz

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (224.4GB/s vs 160.0GB/s)

640 additional rendering cores

Lower TDP (165W vs 200W)

Score

Benchmark

FP32 (float)

GeForce GTX 980 +121%

4.981 TFLOPS

Radeon HD 6950

2.253 TFLOPS

GeForce GTX 980

VS

Radeon HD 6950

Graphics Card

Sep 2014

Release Date

Dec 2010

GeForce 900

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1127 MHz

Base Clock

-

1216 MHz

Boost Clock

-

1753 MHz

Memory Clock

1250 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

224.4GB/s

Bandwidth

160.0GB/s

Render Config

-

Compute Units

22

-

2048

Shading Units

1408

128

TMUs

88

64

ROPs

32

-

48 KB (per SMM)

L1 Cache

8 KB (per CU)

2 MB

L2 Cache

512 KB

-

Theoretical Performance

77.82 GPixel/s

Pixel Rate

25.60 GPixel/s

155.6 GTexel/s

Texture Rate

70.40 GTexel/s

-

4.981 TFLOPS

FP32 (float)

2.253 TFLOPS

155.6 GFLOPS

FP64 (double)

563.2 GFLOPS

Board Design

165W

TDP

200W

450 W

Suggested PSU

550 W

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

Outputs

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

2x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

GM204

GPU Name

Cayman

GM204-400-A1

GPU Variant

Cayman PRO (215-0807019)

Maxwell 2.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

5.2 billion

Transistors

2.64 billion

398 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

5.2

CUDA

-

6.4

Shader Model

5.0

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