AMD Radeon R9 Nano vs AMD Radeon HD 6790

VS

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

Main Differences

AMD Radeon R9 Nano 's Advantages

Released 4 years and 4 months late

More VRAM (4GB vs 1GB)

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

3296 additional rendering cores

AMD Radeon HD 6790 's Advantages

Lower TDP (150W vs 175W)

Score

Benchmark

FP32 (float)

Radeon R9 Nano +509%

8.192 TFLOPS

Radeon HD 6790

1.344 TFLOPS

Radeon R9 Nano

VS

Radeon HD 6790

Graphics Card

Aug 2015

Release Date

Apr 2011

Pirate Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

500 MHz

Memory Clock

1050 MHz

Memory

4GB

Memory Size

1024MB

HBM

Memory Type

GDDR5

4096bit

Memory Bus

256bit

512.0GB/s

Bandwidth

134.4GB/s

Render Config

-

SM Count

-

64

Compute Units

10

4096

Shading Units

800

256

TMUs

40

64

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

2 MB

L2 Cache

512 KB

Theoretical Performance

64.00 GPixel/s

Pixel Rate

13.44 GPixel/s

256.0 GTexel/s

Texture Rate

33.60 GTexel/s

8.192 TFLOPS

FP16 (half)

-

8.192 TFLOPS

FP32 (float)

1344 GFLOPS

512.0 GFLOPS

FP64 (double)

-

Graphics Processor

Fiji

GPU Name

Barts

Fiji XT CA (215-0862120)

GPU Variant

Barts LE (215-0798002)

GCN 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

8.9 billion

Transistors

1.7 billion

596 mm²

Die Size

255 mm²

Board Design

175W

TDP

150W

450 W

Suggested PSU

450 W

1x HDMI 1.4a 3x DisplayPort 1.2

Outputs

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

1x 8-pin

Power Connectors

2x 6-pin

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

CUDA

-

6.3

Shader Model

5.0

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