NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon R9 Nano

VS

NVIDIA GeForce GT 640 OEM Rebrand

AMD Radeon R9 Nano

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 4GB VRAM Radeon R9 Nano to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Lower TDP (75W vs 175W)

AMD Radeon R9 Nano 's Advantages

Released 3 years and 4 months late

More VRAM (4GB vs 1536GB)

Larger VRAM bandwidth (512.0GB/s vs 38.40GB/s)

3952 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

Radeon R9 Nano +1873%

8.192 TFLOPS

GeForce GT 640 OEM Rebrand

VS

Radeon R9 Nano

Graphics Card

Apr 2012

Release Date

Aug 2015

GeForce 600

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

800 MHz

Memory Clock

500 MHz

Memory

1536MB

Memory Size

4GB

DDR3

Memory Type

HBM

192bit

Memory Bus

4096bit

38.40GB/s

Bandwidth

512.0GB/s

Render Config

-

Compute Units

64

3

SM Count

-

144

Shading Units

4096

24

TMUs

256

24

ROPs

64

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

2 MB

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

64.00 GPixel/s

17.28 GTexel/s

Texture Rate

256.0 GTexel/s

-

FP16 (half)

8.192 TFLOPS

414.7 GFLOPS

FP32 (float)

8.192 TFLOPS

34.56 GFLOPS

FP64 (double)

512.0 GFLOPS

Board Design

75W

TDP

175W

250 W

Suggested PSU

450 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x HDMI 1.4a 3x DisplayPort 1.2

None

Power Connectors

1x 8-pin

Graphics Processor

GF116

GPU Name

Fiji

GF116-150-A1

GPU Variant

Fiji XT CA (215-0862120)

Fermi 2.0

Architecture

GCN 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.17 billion

Transistors

8.9 billion

238 mm²

Die Size

596 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.1

OpenCL

2.0

N/A

Vulkan

1.2

2.1

CUDA

-

5.1

Shader Model

6.3

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