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Mac Forum / Applications / Virtual PC / January 20082 Gig RAM Limit
I remember reading a while back about a RAM limit of 2 Gig for VPC but I thought 7.01 patch fixed this. Today I upgraded my G5 from 1.5 Gig of RAM to 3.5 Gig. I went into VPC afterwards to bump up my memory settings for some of my Virtual machines and noticed that the maximum I can set them to is 512 Meg and no higher. So I increased my XP Pro environment to 512 Meg and booted. Once booted to the desktop I did a VPC Properties and it said that my machine was running OSX 10.4.9 which I am actually running 10.4.11 and that my total system RAM was 2 Gig. Like I stated above I remember hearing about a RAM limit initially when VPC 7 came out but I thought it was taken care of. Only 512 Meg is not a show stopper but I do have plenty more RAM available to VPC. Anybody know more of what's going on than what I just found out? > I remember reading a while back about a RAM limit of 2 Gig for VPC but I > thought 7.01 patch fixed this. Today I upgraded my G5 from 1.5 Gig of RAM [quoted text clipped - 9 lines] > stopper but I do have plenty more RAM available to VPC. Anybody know more > of what's going on than what I just found out? The 2 GB RAM limit that you read about was for Windows NT Workstation 4.0 VPC never had any more than 512MB. A word of advice.....do not set your RAM to the max of 512MB. It will actually slow the performace of your virtual machine. Optimal performance levels can be achieved by using the formula: 50% of actual physical RAM to a maximum of 384MB. The 2GB reading that your system is reporting is total 'virtual mamory', a combination of disk space and RAM for quick access to required files. In article <1f99385d-0411-4475-b00a-f40bcaa2bd4f@s8g2000prg.googlegroups.com>, <snip> > The 2GB reading that your system is reporting is total 'virtual > mamory', a combination of disk space and RAM for quick access to > required files. "Virtual mamory"!? Is that something like silicon breast inserts?? ;o) Helpful Harry Hopefully helping harassed humans happily handle handiwork hardships ;o) I thought the 2GB limit for NT was the size of the hard drive partition, not memory. On Jan 16, 9:52 pm, Fred Horvat <f...@copper.net> wrote: > I remember reading a while back about a RAM limit of 2 Gig for VPC but I > thought 7.01 patch fixed this. Today I upgraded my G5 from 1.5 Gig of RAM [quoted text clipped - 10 lines] > stopper but I do have plenty more RAM available to VPC. Anybody know more > of what's going on than what I just found out? The 2 GB RAM limit that you read about was for Windows NT Workstation 4.0 VPC never had any more than 512MB. A word of advice.....do not set your RAM to the max of 512MB. It will actually slow the performace of your virtual machine. Optimal performance levels can be achieved by using the formula: 50% of actual physical RAM to a maximum of 384MB. The 2GB reading that your system is reporting is total 'virtual mamory', a combination of disk space and RAM for quick access to required files. Well yes there is a 2 gig limit on any hard drive formatted as FAT16 (DOS) whether it is in DOS, NT, 95, or 98. But if you format it as NTFS The limit is much higher. On 1/22/08 4:44 PM, in article O7iC1$TXIHA.3940@TK2MSFTNGP05.phx.gbl, "Colin Barnhorst" <c.barnhorst@comcast.net> wrote: > I thought the 2GB limit for NT was the size of the hard drive partition, not > memory. [quoted text clipped - 26 lines] > mamory', a combination of disk space and RAM for quick access to > required files. I recall having to limit the partition I was installing NT4 on to 2GB. That's why I mentioned it. I understand FAT16, FAT32, and NTFS quite well. > Well yes there is a 2 gig limit on any hard drive formatted as FAT16 (DOS) > whether it is in DOS, NT, 95, or 98. But if you format it as NTFS The [quoted text clipped - 43 lines] >> mamory', a combination of disk space and RAM for quick access to >> required files. There were problems a while back with G5's with 2GB or more installed with VPC 7.0. 7.0.1 fixed it >I thought the 2GB limit for NT was the size of the hard drive partition, not >memory. [quoted text clipped - 26 lines] >mamory', a combination of disk space and RAM for quick access to >required files.  SignatureCheers, Steve Jain, Virtual Machine MVP http://vpc.essjae.com/ I do not work for Microsoft. That's what I thought in my original posting but it appears that I can run VPC with over 2 Gig but it only thinks I have 2 Gig and worse only allows me 512Meg to a virtual machine. On 1/22/08 11:26 PM, in article d9gdp39nvlg8me804vd1rbdn0oo7gmeq1m@4ax.com, > There were problems a while back with G5's with 2GB or more installed > with VPC 7.0. [quoted text clipped - 31 lines] >> mamory', a combination of disk space and RAM for quick access to >> required files. >That's what I thought in my original posting but it appears that I can run >VPC with over 2 Gig but it only thinks I have 2 Gig and worse only allows me >512Meg to a virtual machine. There is a hard limit in VPC, the max you can assign to a VM is 512MB, regardless of the host's RAM. The overhead of managing all that RAM in an emulated environment causes a big performance hit. VPC simply ignores more than 2GB, which resolves the >2GB problems that occured in VPC 7.00 SignatureCheers, Steve Jain, Virtual Machine MVP http://vpc.essjae.com/ I do not work for Microsoft. XP runs fine with 512 and 98 and 2000 I run well under 512. The couple of Linux Distros I run I have under 512 and all run well. Only Vista I'd like to run over 512 but that's not possible so 512 will have to do. Thanks On 1/23/08 7:14 PM, in article eulfp3trdkg81t29hv3jqni18t595ff764@4ax.com, >> That's what I thought in my original posting but it appears that I can run >> VPC with over 2 Gig but it only thinks I have 2 Gig and worse only allows me [quoted text clipped - 6 lines] > VPC simply ignores more than 2GB, which resolves the >2GB problems > that occured in VPC 7.00 You might as well run Vista Home Basic now that MS has changed the EULA to permit the home editions to be virtualized. You can load it by not entering a PK. That will allow you to install the edition of your choice on the 30-day trial. There is workaround to extend even that. Some of the folks in the Vista newsgroups can point you to the workaround if you don't already know about it. I see little point in running the other editions given the ram limit. A lot of their additional features won't work well or at all in a VPC7 vm anyway even if you could up the ram. > XP runs fine with 512 and 98 and 2000 I run well under 512. The couple of > Linux Distros I run I have under 512 and all run well. Only Vista I'd [quoted text clipped - 17 lines] >> VPC simply ignores more than 2GB, which resolves the >2GB problems >> that occured in VPC 7.00 I have Vista Business and have all the bells and whistles turned off. Speed is on the slow side though. I use it for testing only and not day to day type stuff. On 1/24/08 4:54 PM, in article OHBJ9OtXIHA.4200@TK2MSFTNGP03.phx.gbl, "Colin Barnhorst" <c.barnhorst@comcast.net> wrote: > You might as well run Vista Home Basic now that MS has changed the EULA to > permit the home editions to be virtualized. You can load it by not entering [quoted text clipped - 26 lines] >>> VPC simply ignores more than 2GB, which resolves the >2GB problems >>> that occured in VPC 7.00 I follow you on the 512Meg limit but not the 2 Gig limit. > The 2GB reading that your system is reporting is total 'virtual > mamory', a combination of disk space and RAM for quick access to > required files. I have a total of 3.5 Gig of real RAM. So the 2Gig limit is imposed by VPC then? On 1/22/08 2:30 PM, in article 1f99385d-0411-4475-b00a-f40bcaa2bd4f@s8g2000prg.googlegroups.com, "Paul Power" <paulkpower@gmail.com> wrote: >> I remember reading a while back about a RAM limit of 2 Gig for VPC but I >> thought 7.01 patch fixed this. Today I upgraded my G5 from 1.5 Gig of RAM [quoted text clipped - 21 lines] > mamory', a combination of disk space and RAM for quick access to > required files. >I follow you on the 512Meg limit but not the 2 Gig limit. > [quoted text clipped - 4 lines] >I have a total of 3.5 Gig of real RAM. So the 2Gig limit is imposed by VPC >then? There was a bug with VPC 7.00, if you had more than 2GB. It was fixed in 7.0.1 SignatureCheers, Steve Jain, Virtual Machine MVP http://vpc.essjae.com/ I do not work for Microsoft. |
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