NVIDIA GeForce 840A vs AMD Radeon HD 8770M

VS

NVIDIA GeForce 840A

AMD Radeon HD 8770M

We compared two Mobile platform GPUs: 2GB VRAM GeForce 840A and 2GB VRAM Radeon HD 8770M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 840A 's Advantages

Released 11 months late

Boost Clock has increased by 36% (1124MHz vs 825MHz)

AMD Radeon HD 8770M 's Advantages

Larger VRAM bandwidth (72.00GB/s vs 16.02GB/s)

Score

Benchmark

FP32 (float)

GeForce 840A +36%

0.863 TFLOPS

Radeon HD 8770M

0.633 TFLOPS

GeForce 840A

VS

Radeon HD 8770M

Graphics Card

Mar 2014

Release Date

Apr 2013

GeForce 800A

Generation

Solar System

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

1029 MHz

Base Clock

775 MHz

1124 MHz

Boost Clock

825 MHz

1001 MHz

Memory Clock

1125 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

128bit

16.02GB/s

Bandwidth

72.00GB/s

Render Config

-

Compute Units

6

-

384

Shading Units

384

16

TMUs

24

8

ROPs

8

-

64 KB (per SMM)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

8.992 GPixel/s

Pixel Rate

6.600 GPixel/s

17.98 GTexel/s

Texture Rate

19.80 GTexel/s

-

863.2 GFLOPS

FP32 (float)

633.6 GFLOPS

26.98 GFLOPS

FP64 (double)

39.60 GFLOPS

Board Design

33W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

-

Graphics Processor

GM108

GPU Name

Mars

-

GPU Variant

Mars S3 XT (216-0842018)

Maxwell

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

Unknown

Transistors

0.95 billion

Unknown

Die Size

77 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

2.1 (1.2)

1.3

Vulkan

1.2.170

5.0

CUDA

-

5.1

Shader Model

6.5 (5.1)

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