AMD Radeon HD 7990 vs AMD Radeon R9 Nano

VS

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 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 7990 's Advantages

Boost Clock1000MHz

AMD Radeon R9 Nano 's Advantages

Released 2 years and 4 months late

More VRAM (4GB vs 3GB)

Larger VRAM bandwidth (512.0GB/s vs 288.0GB/s)

2048 additional rendering cores

Lower TDP (175W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7990

4.096 TFLOPS

Radeon R9 Nano +100%

8.192 TFLOPS

Radeon HD 7990

VS

Radeon R9 Nano

Graphics Card

Apr 2013

Release Date

Aug 2015

Southern Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

950 MHz

Base Clock

-

1000 MHz

Boost Clock

-

1500 MHz

Memory Clock

500 MHz

Memory

3GB

Memory Size

4GB

GDDR5

Memory Type

HBM

384bit

Memory Bus

4096bit

288.0GB/s

Bandwidth

512.0GB/s

Render Config

-

SM Count

-

32

Compute Units

64

2048

Shading Units

4096

128

TMUs

256

32

ROPs

64

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

2 MB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

64.00 GPixel/s

128.0 GTexel/s

Texture Rate

256.0 GTexel/s

-

FP16 (half)

8.192 TFLOPS

4.096 TFLOPS

FP32 (float)

8.192 TFLOPS

1024 GFLOPS

FP64 (double)

512.0 GFLOPS

Graphics Processor

Malta

GPU Name

Fiji

Malta XT (215-0849026)

GPU Variant

Fiji XT CA (215-0862120)

GCN 1.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

8.9 billion

365 mm²

Die Size

596 mm²

Board Design

375W

TDP

175W

750 W

Suggested PSU

450 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x HDMI 1.4a 3x DisplayPort 1.2

2x 8-pin

Power Connectors

1x 8-pin

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.0

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

6.3

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