ATI Mobility Radeon HD 3870 vs NVIDIA GeForce 945A

VS

ATI Mobility Radeon HD 3870 NVIDIA GeForce 945A

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 1024MB VRAM GeForce 945A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

Larger VRAM bandwidth (54.40GB/s vs 40.10GB/s)

NVIDIA GeForce 945A 's Advantages

Released 6 years and 9 months late

Boost Clock1189MHz

More VRAM (1024GB vs 512GB)

64 additional rendering cores

Lower TDP (33W vs 55W)

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870

0.422 TFLOPS

GeForce 945A +116%

0.913 TFLOPS

Mobility Radeon HD 3870

VS

GeForce 945A

Graphics Card

Jun 2008

Release Date

Mar 2015

M8x

Generation

GeForce 900A

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

1006 MHz

-

Boost Clock

1189 MHz

850 MHz

Memory Clock

1253 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

64bit

54.40GB/s

Bandwidth

40.10GB/s

Render Config

-

SM Count

-

4

Compute Units

-

320

Shading Units

384

16

TMUs

24

16

ROPs

8

-

Tensor Cores

-

RT Cores

-

L1 Cache

64 KB (per SMM)

256 KB

L2 Cache

1024 KB

Theoretical Performance

10.56 GPixel/s

Pixel Rate

9.512 GPixel/s

10.56 GTexel/s

Texture Rate

28.54 GTexel/s

-

FP16 (half)

-

422.4 GFLOPS

FP32 (float)

913.2 GFLOPS

84.48 GFLOPS

FP64 (double)

28.54 GFLOPS

Graphics Processor

M88

GPU Name

GM108

-

GPU Variant

-

TeraScale

Architecture

Maxwell

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

Unknown

192 mm²

Die Size

Unknown

Board Design

55W

TDP

33W

-

Suggested PSU

-

No outputs

Outputs

No outputs

-

Power Connectors

-

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

N/A

OpenCL

3.0

N/A

Vulkan

1.3

-

CUDA

5.0

4.1

Shader Model

5.1

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