Xahid Posted May 7, 2009 Share Posted May 7, 2009 Just installed Win7 RC 64bit & it shows 2.94GB Ram is usable out of 4GB Ram installed! its CORSAIR XMS2 1X4 Dual Channel Memory Kit ! any idea ? Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/ Share on other sites More sharing options...
Chris123NT Posted May 7, 2009 Share Posted May 7, 2009 If you have an Intel 945 chipset then that's your problem. The chipset itself is limited to 32 bit addressing and cannot address more than ~3 GB RAM. Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956080 Share on other sites More sharing options...
happymonkey Posted May 7, 2009 Share Posted May 7, 2009 what mobo do you own? because it probably only supports 3GB max no matter what ram you install... Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956090 Share on other sites More sharing options...
Xahid Posted May 7, 2009 Author Share Posted May 7, 2009 its ASUS P5B (Intel P965 Chipset) http://ae.asus.com/products.aspx?l1=3&...amp;modelmenu=1 Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956096 Share on other sites More sharing options...
Dashel Posted May 7, 2009 Share Posted May 7, 2009 Thats strange. I'll have to check mine when I refresh my desktop this weekend. (Also with a P965 chipset - Abit board) Surely you can't install a 64bit chip in 32bit limited mobos?! Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956182 Share on other sites More sharing options...
ultimate99 Posted May 7, 2009 Share Posted May 7, 2009 maybe you need a chipset driver update? Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956188 Share on other sites More sharing options...
Xahid Posted May 7, 2009 Author Share Posted May 7, 2009 I don't think its 32Bit Limitation Mobo, its describe on their website that P965 supports 8GB max, whats the use of 8GB if it can't utilize it ? :o Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956214 Share on other sites More sharing options...
jonhapimp Posted May 7, 2009 Share Posted May 7, 2009 maybe you need to update your driver like ultimate said Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956228 Share on other sites More sharing options...
Raa Posted May 7, 2009 Share Posted May 7, 2009 The problem isn't a new one though. Even on old 8xx chipsets you could have >3gb of ram installed and they didn't support 64 bit. :p Check your BIOS settings, there might be an option called "memory remap" disable or enable it to see if it makes any difference. Tried a new BIOS? Chipset drivers won't change anything, they don't control how the O/S sees RAM. Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956230 Share on other sites More sharing options...
Xahid Posted May 7, 2009 Author Share Posted May 7, 2009 thats weird, if they don't support 64Bit, then whats the use of >3GB Ram ? :o Got the latest BIOS & I will check the "memory remap" function, thanx for the Tip :) Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956240 Share on other sites More sharing options...
Brandon Live Veteran Posted May 7, 2009 Veteran Share Posted May 7, 2009 Check for a BIOS update as well. Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956242 Share on other sites More sharing options...
atleeit Posted May 7, 2009 Share Posted May 7, 2009 ASUS P5B has a function as described above, Memory remap, If it's disabled, enable it as it will allow Vista and Windows 7 to see full memory capacity. Alot of people have this problem if you search google. Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956286 Share on other sites More sharing options...
Xahid Posted May 7, 2009 Author Share Posted May 7, 2009 atleeit said: ASUS P5B has a function as described above, Memory remap, If it's disabled, enable it as it will allow Vista and Windows 7 to see full memory capacity. Alot of people have this problem if you search google. Thanx, I will check it out as soon as I get back to home :) Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956304 Share on other sites More sharing options...
Southern Patriot Posted May 7, 2009 Share Posted May 7, 2009 Brandon Live said: Check for a BIOS update as well. It seems that a bunch of motherboard makers are going to have to finally get off their butts and release BIOS updates that properly support 64-bit, virtualization, etc. As I've pointed out in my other threads, my motherboard had an option for virtualization, shows it as enabled, I have a processor that supports it, yet I still can't get it working! Not only that, I also have weird issues with memory mapping overlapping PCI cards when I have 4GB installed. Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956306 Share on other sites More sharing options...
dafin0 Posted May 7, 2009 Share Posted May 7, 2009 quick question.. are you running onboard graphics? if so that uses your RAM EDIT: there is way to much RAM missing for that.. dont worry about this comment Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590956542 Share on other sites More sharing options...
waxxi Posted May 7, 2009 Share Posted May 7, 2009 Did you upgrade from another leak? I experienced a similar problem when upgrading 7000->7048->7068. In 7000 it showed correctly 4gb then after 7048 upgrade it showed 3.25 and after all with 7068 it only showed 3gb usable:) After a clean install everything went normal. Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590957664 Share on other sites More sharing options...
Xahid Posted May 7, 2009 Author Share Posted May 7, 2009 Thank you everyone who suggested Memory Remap function, by enabling the Function, Windows is Now using full 4GB RAM :D thanx again for the quick HELP guys :D Link to comment https://www.neowin.net/forum/topic/768792-win7-64bit-4gb-ram-only-3gb-usable/#findComment-590958394 Share on other sites More sharing options...
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