Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Is performance affected by dual booting?

19 Jul 2013   #1

Windows 7 Ultimate x64, Windows 8.1 Pro x64 (on laptop)
Is performance affected by dual booting?


Just a quick question of if I was to dual boot another OS with windows 7 such as windows 8 or Ubuntu, would it have any ill effects on performance?

I'm fully aware that they boot from different partitions and don't both run at the same time. However. I remember hearing that it can affect how constant the disk transfer speed is and I don't know how true that is.

My System SpecsSystem Spec
19 Jul 2013   #2

Windows 7 Pro 64 bit

Performance would not be effected in any significant way. What sometimes comes up in this situation is that the beginning of the disk will have a higher transfer rate than the rest. This is true but transfer rate is not the only factor in disk performance and is rarely the most important one. Under real world conditions the differences would not be significant.
My System SpecsSystem Spec
19 Jul 2013   #3

Windows 7 32 bit

The main impact, assuming you have plenty of space for the swap file, and free space on the Windows partition, would be defragging. When I had XP on a drive with only 20% free space, very "light" or "less than thorough" however you want to describe it, defrags would take a long time. As I went along I kept more and more free space on C:. I've come to the non-scientific anecdotal conclusion that having about 70% free space during a defrag is optimal, for my usage.

If you shrink C: to partition the drive, then you could be in a position where defragging C: can be very slow. It might be worth the effort to put the other OS on another physical drive. Or if not that, then try to leave a lot more free space on C: than you think you need. :)
My System SpecsSystem Spec


 Is performance affected by dual booting?

Thread Tools

Similar help and support threads
Thread Forum
SSD performance concerns when booting win 7 ult
Ok reciently some were working to help me try and resolve windows update issues which lead to me having to just reinstall the OS and that in turn gave me the excuse and oppertunity I needed to also do some small hardware upgrades. I recently got a Kingston 120GB SSD which I have installed and...
Hardware & Devices
HELP: WIN7PRO > WIN10 > WIN7PRO Affected Performance and Connectivity
First, the rant, which you can skip... After discovering that the WIN10 installation deleted some of my software and put on handcuffware, I was livid. As I began to experience compatibility issues with some of my software, limiting my ability to access my LAN, and preventing everyone in my family...
Performance & Maintenance
Dual Boot menu still present even tho im not dual booting
Hi, So i was dual booting 2 windows 7 of my computer as one of them stuff up so i was transfering all my data over to the new windows 7. I use partion wizard to delete the old windows 7 and extend the size of the new windows 7. No every time i start my PC up i get presented with the dual...
Installation & Setup
Dual Booting
My PC has a 32 bit version of Windows 7 installed. I have 2 hard drives. I would like to do a clean install to tidy and speed things up. I also have a copy of Windows 7 64 bit. Is it possible/practical to retain my current 32 bit OS on the C drive but do a fresh install of the 64 bit version...
Installation & Setup
CPU Performance- Dual vs. Quad
hi im just curious.... i was looking through the list of 1st gen intel i7 cpus and i was just curious, what would be better for hardcore gaming, video rendering, HD video editing and watching HD video, and internet. i7 dual core with base frequency at 2.8ghz and turbo up to 3.46ghz or a quad core...
Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 17:16.
Twitter Facebook Google+