It's unclear to me the maximum memory you should allocate for a Windows 7 32-bit guest. Because of overhead and memory holes, I would expect the number to be less than 4GB, perhaps 3.5GB, but in reality it seems to only be 3GB. I can never get taskmgr.exe to report more than 3071mb total physical memory for a Windows 7 32-bit guest.
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This Vmware KB says that a hardware version 7 guest offers 3072mb supported memory, and 1024mb reserved memory. But the language of the KB is puzzling. It says that this 1024mb 'is not wasted' because 'the VMM does not need to allocate the memory that the guest cannot access'.
- Maximum memory supported in Windows 7 Upgrading the amount of memory is often a straightforward way to improve the performance of your computer. However, before buying the additional memory modules, it is important you verify whether your current version of Windows 7 can actually use the additional memory.
- While the upper or maximum RAM memory limit for 32-bit Windows 7/8 is 4GB, when it comes to the 64-bit editions, the amount of memory depends on the edition.
HomeHow To's SOLVED: Windows 10 Won’t Use Full RAM. How To's Windows SOLVED: Windows 10 Won’t Use Full RAM. By Kevin Arrows July 7, 2019. 5 4 minutes read. On the upper right corner, Clear the checkbox next to Maximum memory. Now restart your computer. Check of the issue resolved. If not, move on to the next solution. Windows 7 is it 32 or 64 bit and how much ram will each support just new here so excuse my dumbness hahha This thread is locked. Windows 7 Starter: 2 GB. TLDR: 32bit CPUs typically have 32bit address buses. The width of the address bus (in this case 32bits) limit the total addressable memory. So a 32bit computer can address 2^32 bytes which works out to 4GB. A bit of background. Computers have what. Basically, for the usage of 4GB or more memory a 64-bit operating system is mandatory. Our table provides an overview of maximum addressable memory under the current operating systems. Windows Server 2008 R2, Windows 7 and Windows Server 2008: 75% of RAM up to a maximum of 128 GB Windows Vista: 40% of RAM up to a maximum of 128 GB. Windows Server 2003 and Windows XP: Up to 128 GB depending on configuration and RAM. System cache virtual address space (physical size limited only by physical memory).
This would make sense if Windows 7 32-bit could only support 3072mb of RAM, but in this article Mark Russinovich says that a Windows 32-bit client can use up to 3.75GB of memory depending on the hardware. If you have a gaming system with a large video card, then Windows would give you much less than 3.75GB.
Other posters to these forums suggest that Windows XP guests max out at ~3.6GB.
So, can workstation really effectively use that 1024MB of reserved memory? That seems like too much, unless the VM is running a graphics-intensive game.
Running Alex Ionescu's meminfo with 4096MB allocated to the VM I get:
Usage Active Standby TOTAL
Process Private 36360 ( 145440 KB) 0 ( 0 KB) 608004 (2432016 KB)
Memory Mapped File 13757 ( 55028 KB) 88468 ( 353872 KB) 102230 ( 408920 KB)
Page File Mapped 2212 ( 8848 KB) 0 ( 0 KB) 2373 ( 9492 KB)
Page Table 1701 ( 6804 KB) 0 ( 0 KB) 1709 ( 6836 KB)
Paged Pool 18081 ( 72324 KB) 0 ( 0 KB) 18204 ( 72816 KB)
Non Paged Pool 31909 ( 127636 KB) 0 ( 0 KB) 31911 ( 127644 KB)
System PTE 3522 ( 14088 KB) 0 ( 0 KB) 4429 ( 17716 KB)
Session Private 2866 ( 11464 KB) 0 ( 0 KB) 2866 ( 11464 KB)
Metafile 4576 ( 18304 KB) 8750 ( 35000 KB) 13326 ( 53304 KB)
AWE Pages 0 ( 0 KB) 0 ( 0 KB) 0 ( 0 KB)
Driver Lock Pages 241 ( 964 KB) 0 ( 0 KB) 241 ( 964 KB)
Kernel Stack 810 ( 3240 KB) 0 ( 0 KB) 1009 ( 4036 KB)
TOTAL 116035 ( 464140 KB) 97218 ( 388872 KB) 786302 (3145208 KB)
Running it with 3076MB allocated to the VM I get nearly identical results:
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Usage Active Standby TOTAL
Process Private 38283 ( 153132 KB) 0 ( 0 KB) 590056 (2360224 KB)
Memory Mapped File 15254 ( 61016 KB) 99135 ( 396540 KB) 114394 ( 457576 KB)
Page File Mapped 2170 ( 8680 KB) 0 ( 0 KB) 2394 ( 9576 KB)
Page Table 1681 ( 6724 KB) 0 ( 0 KB) 1681 ( 6724 KB)
Paged Pool 22998 ( 91992 KB) 0 ( 0 KB) 23670 ( 94680 KB)
Non Paged Pool 32492 ( 129968 KB) 0 ( 0 KB) 32494 ( 129976 KB)
System PTE 3528 ( 14112 KB) 0 ( 0 KB) 4430 ( 17720 KB)
Session Private 1902 ( 7608 KB) 0 ( 0 KB) 1903 ( 7612 KB)
Metafile 4225 ( 16900 KB) 9886 ( 39544 KB) 14111 ( 56444 KB)
AWE Pages 0 ( 0 KB) 0 ( 0 KB) 0 ( 0 KB)
Driver Lock Pages 241 ( 964 KB) 0 ( 0 KB) 241 ( 964 KB)
Kernel Stack 729 ( 2916 KB) 0 ( 0 KB) 928 ( 3712 KB)
TOTAL 123503 ( 494012 KB) 109021 ( 436084 KB) 786302 (3145208 KB)
So, what is the maximum memory that should be allocated for a Windows XP/Vista/7 32-bit guest running on Workstation, Fusion, or vSphere? Is it really 3072mb? Does anything above 3072MB get wasted?
My environment is
guest OS: Windows 7 ultimate x86, default settings, 1-cpu
hypervisor: VMWare Workstation 7.1.3
host OS: Windows 7 ultimate x64
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host: Core i5 with 8GB RAM installed
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