AMD Radeon R9 390X vs AMD Radeon HD 6950

VS

AMD Radeon R9 390X

AMD Radeon HD 6950

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 2GB VRAM Radeon HD 6950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390X 's Advantages

Released 4 years and 6 months late

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (384.0GB/s vs 160.0GB/s)

1408 additional rendering cores

AMD Radeon HD 6950 's Advantages

Lower TDP (200W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390X +162%

5.914 TFLOPS

Radeon HD 6950

2.253 TFLOPS

Radeon R9 390X

VS

Radeon HD 6950

Graphics Card

Jun 2015

Release Date

Dec 2010

Pirate Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1500 MHz

Memory Clock

1250 MHz

Memory

8GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

160.0GB/s

Render Config

44

Compute Units

22

-

2816

Shading Units

1408

176

TMUs

88

64

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

67.20 GPixel/s

Pixel Rate

25.60 GPixel/s

184.8 GTexel/s

Texture Rate

70.40 GTexel/s

-

5.914 TFLOPS

FP32 (float)

2.253 TFLOPS

739.2 GFLOPS

FP64 (double)

563.2 GFLOPS

Board Design

275W

TDP

200W

600 W

Suggested PSU

550 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Grenada

GPU Name

Cayman

Grenada XT (215-0880004)

GPU Variant

Cayman PRO (215-0807019)

GCN 2.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

6.2 billion

Transistors

2.64 billion

438 mm²

Die Size

389 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

6.3

Shader Model

5.0

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