NVIDIA GeForce 845M vs NVIDIA GeForce GT 420M

VS

NVIDIA GeForce 845M NVIDIA GeForce GT 420M

We compared two Mobile platform GPUs: 2GB VRAM GeForce 845M and 512MB VRAM GeForce GT 420M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 845M 's Advantages

Released 4 years and 11 months late

Boost Clock1176MHz

Larger VRAM bandwidth (40.10GB/s vs 25.60GB/s)

288 additional rendering cores

NVIDIA GeForce GT 420M 's Advantages

Lower TDP (23W vs 33W)

Score

Benchmark

FP32 (float)

GeForce 845M +370%

0.903 TFLOPS

GeForce GT 420M

0.192 TFLOPS

GeForce 845M

VS

GeForce GT 420M

Graphics Card

Aug 2015

Release Date

Sep 2010

GeForce 800M

Generation

GeForce 400M

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1071 MHz

Base Clock

-

1176 MHz

Boost Clock

-

1253 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

DDR3

64bit

Memory Bus

128bit

40.10GB/s

Bandwidth

25.60GB/s

Render Config

-

SM Count

2

-

Compute Units

-

384

Shading Units

96

32

TMUs

16

ROPs

4

-

Tensor Cores

-

RT Cores

-

64 KB (per SMM)

L1 Cache

64 KB (per SM)

1024 KB

L2 Cache

256 KB

Theoretical Performance

18.82 GPixel/s

Pixel Rate

2.000 GPixel/s

37.63 GTexel/s

Texture Rate

8.000 GTexel/s

-

FP16 (half)

-

903.2 GFLOPS

FP32 (float)

192.0 GFLOPS

28.22 GFLOPS

FP64 (double)

16.00 GFLOPS

Graphics Processor

GM108

GPU Name

GF108

-

GPU Variant

N11P-GE-A1

Maxwell

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

Unknown

Transistors

0.585 billion

Unknown

Die Size

116 mm²

Board Design

33W

TDP

23W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

-

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

1.1

1.3

Vulkan

N/A

5.0

CUDA

2.1

5.1

Shader Model

5.1

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