ATI Mobility Radeon HD 3870 vs NVIDIA GeForce GTX 850M

VS

ATI Mobility Radeon HD 3870

NVIDIA GeForce GTX 850M

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 2GB VRAM GeForce GTX 850M 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 32.03GB/s)

NVIDIA GeForce GTX 850M 's Advantages

Released 5 years and 9 months late

More VRAM (2GB vs 512GB)

320 additional rendering cores

Lower TDP (45W vs 55W)

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870

0.422 TFLOPS

GeForce GTX 850M +173%

1.155 TFLOPS

Mobility Radeon HD 3870

VS

GeForce GTX 850M

Graphics Card

Jun 2008

Release Date

Mar 2014

M8x

Generation

GeForce 800M

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

850 MHz

Memory Clock

1001 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

DDR3

256bit

Memory Bus

128bit

54.40GB/s

Bandwidth

32.03GB/s

Render Config

4

Compute Units

-

320

Shading Units

640

16

TMUs

40

16

ROPs

16

-

L1 Cache

64 KB (per SMM)

256 KB

L2 Cache

2 MB

-

Theoretical Performance

10.56 GPixel/s

Pixel Rate

14.43 GPixel/s

10.56 GTexel/s

Texture Rate

36.08 GTexel/s

-

422.4 GFLOPS

FP32 (float)

1155 GFLOPS

84.48 GFLOPS

FP64 (double)

36.08 GFLOPS

Board Design

55W

TDP

45W

-

No outputs

Outputs

No outputs

-

Graphics Processor

M88

GPU Name

GM107

-

GPU Variant

N15P-GT-A1

TeraScale

Architecture

Maxwell

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

1.87 billion

192 mm²

Die Size

148 mm²

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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