How much RAM to allocate Windows 7 (32bit) with VirtualBox?

Chase R

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Original poster
May 8, 2008
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How much RAM can Windows 7 (32bit) take in VirtualBox? I've heard that giving it too much can cause crashes and problems. I'll be installing 8GB next week, so there is plenty to go around :)
 

Skyrim

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Dec 13, 2011
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I think 2GB is enough. 32bit windows can only address 3.2GB physical memory.
 

thasan

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Oct 19, 2007
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3 maybe? im using this for parallels. ive 256meg for the graphics card.

How much RAM can Windows 7 (32bit) take in VirtualBox? I've heard that giving it too much can cause crashes and problems. I'll be installing 8GB next week, so there is plenty to go around :)
 

Ccrew

macrumors 68020
Feb 28, 2011
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Windows 7 in a virtual machine is actually happiest with 1 proc and 1gb of memory. It's a technical dissertation, but it's about how it makes the memory calls through the hypervisor. adding procs and memory to the VM in most instances will actually slow it down more often than not.
 

thasan

macrumors 65816
Oct 19, 2007
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Windows 7 in a virtual machine is actually happiest with 1 proc and 1gb of memory. It's a technical dissertation, but it's about how it makes the memory calls through the hypervisor. adding procs and memory to the VM in most instances will actually slow it down more often than not.
interesting, didnt know that. but what happens if apps in win need more memory? im using the above settings in parallels and win runs without any problem at all.
 

IvanOhio

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Jan 7, 2012
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How much RAM can Windows 7 (32bit) take in VirtualBox? I've heard that giving it too much can cause crashes and problems. I'll be installing 8GB next week, so there is plenty to go around :)
If you are running a 64 bit OS in a virtual box then then there no problem.

32 bit Windows 7 will run on less than a 1 GB of physical RAM.