AMD Radeon RX 455 OEM vs NVIDIA GeForce GT 640 OEM Rebrand

VS

AMD Radeon RX 455 OEM NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 2GB VRAM Radeon RX 455 OEM and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 455 OEM 's Advantages

Released 4 years and 2 months late

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (104.0GB/s vs 38.40GB/s)

624 additional rendering cores

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Lower TDP (75W vs 100W)

Score

Benchmark

FP32 (float)

Radeon RX 455 OEM +288%

1.613 TFLOPS

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

Radeon RX 455 OEM

VS

GeForce GT 640 OEM Rebrand

Graphics Card

Jun 2016

Release Date

Apr 2012

Arctic Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1625 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

1536MB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

192bit

104.0GB/s

Bandwidth

38.40GB/s

Render Config

-

SM Count

3

12

Compute Units

-

768

Shading Units

144

48

TMUs

24

16

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

384 KB

Theoretical Performance

16.80 GPixel/s

Pixel Rate

4.320 GPixel/s

50.40 GTexel/s

Texture Rate

17.28 GTexel/s

-

FP16 (half)

-

1.613 TFLOPS

FP32 (float)

414.7 GFLOPS

100.8 GFLOPS

FP64 (double)

34.56 GFLOPS

Graphics Processor

Tobago

GPU Name

GF116

Tobago PRO (215-0875010)

GPU Variant

GF116-150-A1

GCN 2.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.08 billion

Transistors

1.17 billion

160 mm²

Die Size

238 mm²

Board Design

100W

TDP

75W

300 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 6-pin

Power Connectors

None

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.0

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

6.3

Shader Model

5.1

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