AMD Radeon HD 6790 vs AMD Radeon R9 Nano

VS

AMD Radeon HD 6790

AMD Radeon R9 Nano

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 and 4GB VRAM Radeon R9 Nano to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6790 's Advantages

Lower TDP (150W vs 175W)

AMD Radeon R9 Nano 's Advantages

Released 4 years and 4 months late

More VRAM (4GB vs 1024GB)

Larger VRAM bandwidth (512.0GB/s vs 134.4GB/s)

3296 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6790

1.344 TFLOPS

Radeon R9 Nano +509%

8.192 TFLOPS

Radeon HD 6790

VS

Radeon R9 Nano

Graphics Card

Apr 2011

Release Date

Aug 2015

Northern Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

500 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

HBM

256bit

Memory Bus

4096bit

134.4GB/s

Bandwidth

512.0GB/s

Render Config

10

Compute Units

64

-

800

Shading Units

4096

40

TMUs

256

16

ROPs

64

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

2 MB

-

Theoretical Performance

13.44 GPixel/s

Pixel Rate

64.00 GPixel/s

33.60 GTexel/s

Texture Rate

256.0 GTexel/s

-

FP16 (half)

8.192 TFLOPS

1344 GFLOPS

FP32 (float)

8.192 TFLOPS

-

FP64 (double)

512.0 GFLOPS

Board Design

150W

TDP

175W

450 W

Suggested PSU

450 W

2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1

Outputs

1x HDMI 1.4a 3x DisplayPort 1.2

2x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

Barts

GPU Name

Fiji

Barts LE (215-0798002)

GPU Variant

Fiji XT CA (215-0862120)

TeraScale 2

Architecture

GCN 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

8.9 billion

255 mm²

Die Size

596 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (12_0)

4.4

OpenGL

4.6

1.2

OpenCL

2.0

N/A

Vulkan

1.2

-

5.0

Shader Model

6.3

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