NVIDIA GeForce 840A vs AMD Radeon HD 7870M

VS

NVIDIA GeForce 840A

AMD Radeon HD 7870M

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 2GB VRAM Radeon HD 7870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Released 1 years and 11 months late

Boost Clock1124MHz

Lower TDP (33W vs 45W)

AMD Radeon HD 7870M 's Advantages

Larger VRAM bandwidth (64.00GB/s vs 16.02GB/s)

256 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 840A

0.863 TFLOPS

Radeon HD 7870M +18%

1.024 TFLOPS

GeForce 840A

VS

Radeon HD 7870M

Graphics Card

Mar 2014

Release Date

Apr 2012

GeForce 800A

Generation

London

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1029 MHz

Base Clock

-

1124 MHz

Boost Clock

-

1001 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

128bit

16.02GB/s

Bandwidth

64.00GB/s

Render Config

-

Compute Units

10

-

384

Shading Units

640

16

TMUs

40

8

ROPs

16

-

64 KB (per SMM)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

12.80 GPixel/s

17.98 GTexel/s

Texture Rate

32.00 GTexel/s

-

863.2 GFLOPS

FP32 (float)

1024 GFLOPS

26.98 GFLOPS

FP64 (double)

64.00 GFLOPS

Board Design

33W

TDP

45W

-

No outputs

Outputs

No outputs

-

Graphics Processor

GM108

GPU Name

Heathrow

-

GPU Variant

Heathrow XT (216-0835033)

Maxwell

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

Unknown

Transistors

1.5 billion

Unknown

Die Size

123 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.3

Vulkan

1.2

5.0

CUDA

-

5.1

Shader Model

5.1

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