A few months ago I picked up a new system that came with 4 gigs of Corsair dominator Ram and it came with Vista 32.I just upgraded (yes upgrade lol) to Windows XP SP3. I was wondering if I should run with 3 or 4GB of ram. I see XP does recognize the 3 but from what I've heard it won't take 4 so I have the 4th gig out right now. Should I put it in or not?Oh and anyone who thinks XP will only use 1 gig of ram need not reply, that's complete rubbish lol.

all fixedhttp://www.simviation.com/cgi-bin/yabb2/Ya...=1208959973/0#3use all 4 and that XP method to tune the address space

Thanks Nick!Should /3GB/Userva=2560 be 4GB if you have for Gigs or just leave the 3?

ok... it only sees 250mbs of that extra gig I just put in :S - I'll just leave it at 3 gigs lol

>ok... it only sees 250mbs of that extra gig I just put in :S>- I'll just leave it at 3 gigs lol>>Not a good idea...DRAM DIMM modules need to be paired-up to have dual-channel capability...putting in just one of the pair slows your entire memory subsystem way down to single-channel speeds.The reality is that with a 32-bit OS, much of that fourth gig of RAM is masked and unusable by hardware mappings to your video array and various and sundry other devices. But you need to either have 2 or 4 sticks in the machine for dual-channel operation.I think it's a mixed bag on 4GB 32-bit configurations still. If the OS sees 4GB, it schedules it, and that can even cause OOM errors where they would not occur in the same system with only 2GB installed.My advice right now is 2GB for a 32-bit operating system, more only in a 64-bit system. I'm on Vista 64 now, and it's just tearing it up witn 4GB. Best $200 I've spent in years.RegardsBob ScottColonel, USAF (ret)ATP IMEL Gulfstream II-III-IV-VColorado Springs, CO

>ok... it only sees 250mbs of that extra gig I just put in :S>- I'll just leave it at 3 gigs lol>>/3GB/Userva=2560 is the correct edit and you must be on FSX SP2 or the app wont use the memorythe 2560 may need to be tweaked if OOM errors still occur.. that value can be lowered by 60 and retested for stability.or the FSX RTM/SP1 ( or FS9) exe file MUST be marked to use >2GB manually with special softwareThe OS edit allows the address space to be expanded so you can use more than 2GB without crashing. The application must be marked for >2GB use (FSX SP2 is) or the addition is worthless to the appYou are better off on 2x2GB than 3x1GB or any other combination due to timing changes and lack of dual channel operation as was suggestedA 64bit OS is a better platform than a 32bit for using more than 2GB however up to about 3.2GB will be in play as long as the APPLICATIOn and OS are marked ...