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Gaming Performance Comparison

Recommended System Requirements
Game Intel HD Graphics Mobile (Broadwell) Radeon HD 6645G2
Cyberpunk 2077 1723% 1663%
Hitman 3 2271% 2193%
Assassins Creed: Valhalla 1567% 1512%
Resident Evil 8 1723% 1663%
FIFA 21 819% 789%
Grand Theft Auto VI 2465% 2380%
Call of Duty: Black Ops Cold War 1513% 1460%
Genshin Impact 1723% 1663%
The Medium 2174% 2100%
Far Cry 6 2537% 2451%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 6645G2 are marginally better than the Intel HD Graphics Mobile (Broadwell).

The Radeon HD 6645G2 has no core clock speed set, so any comparison between Texture and Pixel Fill Rates is not currently possible.

The Graphics Mobile was released over three years more recently than the Radeon HD 6645G2, and so the Graphics Mobile is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the Radeon HD 6645G2 when running the latest games.

The HD Graphics Mobile (Broadwell) and the Radeon HD 6645G2 have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The Graphics Mobile has 4.3 GB/sec greater memory bandwidth than the Radeon HD 6645G2, which means that the memory performance of the Graphics Mobile is marginally better than the Radeon HD 6645G2.

The HD Graphics Mobile (Broadwell) has 12 Shader Processing Units and the Radeon HD 6645G2 has 560. However, the actual shader performance of the Graphics Mobile is 10 and the actual shader performance of the Radeon HD 6645G2 is 0. The Graphics Mobile having 10 better shader performance and an altogether better performance when taking into account other relevant data means that the Graphics Mobile delivers a marginally smoother and more efficient experience when processing graphical data than the Radeon HD 6645G2.

The HD Graphics Mobile (Broadwell) requires 4 Watts to run but there is no entry for the Radeon HD 6645G2.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed300 MHzvs-
Boost Clock850 MHzvs-
ArchitectureBroadwellTerrascale 2
OC Potential - vs -
Driver Support - vs -
Release Date30 Mar 2015vs14 Jun 2011
GPU LinkGD LinkGD Link

GPU Memory

Memory Speed800 MHzvs667 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth25.6GB/secvs21.3GB/sec
L2 Cache 0 KB green tick vs -
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units12vs560
Actual Shader Performance0%vs-
Texture Mapping Units4vs-
Texture Rate1.2 GTexel/svs-
Render Output Units2vs-
Pixel Rate0.6 GPixel/svs-

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs2560x1600
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections0vs-

GPU Power Requirements

Max Power4 Watts-
Recommended PSU--

GPU Features

Shader Model5.0vs5.0
Open GL4.0vs4.1
Open CL-vs-
Notebook GPUyesyes

GPU Supporting Hardware

Recommended Processor--
Recommended RAM4 GB-
Maximum Recommended Gaming Resolution1366x768-

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewIntel HD Graphics Mobile (Broadwell) are integrated graphics in the budget Celeron and Pentium Broadwell Mobile processors.
Their performance depends on the processor they are integrated on, as the latter defines the Base and Boost Clock, as well as on the SYSTEM RAM, which defines the operating memory clock, and whether the GPU accesses a 64-bit or 128-bit memory interface.
Best case scenario, the Intel HD Graphics Mobile (Broadwell) performs on par with Intel HD 4000 Graphics and so most modern demanding games will not be playable. Less graphically intense games will be playable at lower graphics settings.
Radeon HD 6645G2 is a combination of an entry/middle class level AMD Radeon HD 6490M and an integrated AMD Radeon HD 6620G (APU). This system is known as AMD Dual Graphics and also asymmetric CrossFire. It uses Alternate Frame Rendering (AFR) to render different frames on the two graphic cores and can suffer from micro-Stuttering.
The performance relies on solid driver support and, at times, it might even be worse the performance of the Radeon HD 6490M by itself. Only DX10 & DX11 modes are supported which means a game set with lower settings and not set to use DX10/DX11 is not accelerated (does not make use of the asymmetric crossfire feature within the card).
Due to the micro stuttering and performance problems, Dual Graphics may sometimes cause more problems than the possible dual card performance gains they suggest.
Recommended CPU
Possible GPU Upgrades
GPU Variants