Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: 4Gb memory (2.75 Gb usable) memory remapping in bios causes BSOD

19 Feb 2012   #1

Windows 7 Ultimate x64
 
 
4Gb memory (2.75 Gb usable) memory remapping in bios causes BSOD

I recently did a new install of Windows 7 64 bit. I noticed windows showed 4Gb of ram (2.75Gb usable). I read tons of articles after googling this and tried several options to free up some more ram.

I have 2 options in bios to change memory remapping over 4GB. S/W and H/W.

When I enable S/W remapping, windows boots everything seems fine but I get a crackling sound from speakers. Bios shows 4Gb (3Gb usable). Windows shows 4Gb ram (3.0 available).

When I enable H/W remapping, windows BSOD during boot, but bios shows 4Gb ram and all 4 Gb available.

So, does anyone have any suggestions as to how to eliminate the BSOD after enabling H/W memory remapping? Try installing Windows 7 again? I read some people saying bump up the voltage on ram perhaps? I've never done any overclocking, but would try if someone thinks it may help.

I've tried several different setting. Any help would be greatly appreciated.


My System SpecsSystem Spec
.

19 Feb 2012   #2

Microsoft Community Contributor Award Recipient

Windows 7 x64
 
 

This sounds almost like a bios memory compatibility issue to me.
Have you tried checking the ram in both modes using memtest?
RAM - Test with Memtest86+
Since the memory is obviously the center of this I think it bares testing.
Keep in mind you'll need several passes each way with memtest to get any kind of accurate result and will take some time
My System SpecsSystem Spec
20 Feb 2012   #3

Windows 7 Ultimate x64
 
 

Shortly before installing windows 7 I ran memtest on both sets of my memory. I paired them up and ran memtest 2 sticks at a time over night with no errors. I have never ran memtest on each stick individually.

After your suggestion I decided to run memtest on all 4Gb at the same time with both S/W and H/W remapping enabled. This is the only setting bios will show all 4 Gb usable. Within 5 seconds of the memtest start, the system will reboot.

I am going to run memtest with all 4 sticks in and S/W and H/W remapping disabled overnight tonight, but I'm betting it will be fine. Do you think I should try with just S/W or just H/W remapping enabled?
My System SpecsSystem Spec
.


20 Feb 2012   #4

Microsoft Community Contributor Award Recipient

Windows 7 x64
 
 

I'm really starting to think it likely there is a bios update for your motherboard to deal with this.
My System SpecsSystem Spec
20 Feb 2012   #5

Windows 7 Ultimate x64
 
 

I think you may be right. I am running the lastest bios released from Asus (bios 1016). With all my googling around I found that people with my board A8N-SLI Deluxe have been able to flash bios from a Premium board. Several people have commented about how they don't understand why Asus doesn't put this on their website. Running the Premium bios adds better support for memory modules as well as adds a couple more overclocking options.

ASUS A8N-SLI Bios Mod

I'm going to try this bios out. I will let you know as soon as I find something out. Thanks a million for the help so far.
My System SpecsSystem Spec
20 Feb 2012   #6

Windows 7 Ultimate x64
 
 

I successfully flashed my bios to the premium bios. Bios shows 4Gb of memory (all usable). S/W and H/W remapping was enabled by default under new bios. Crossing my fingers, I let Windows 7 boot up. Windows 7 shows 4 Gb of ram (all usable). So far so good, but experiencing some crackling sounds in speakers. I'm going to play around with my drivers to see if I can fix the sound problem.
My System SpecsSystem Spec
20 Feb 2012   #7

Windows 7 Ultimate x64
 
 

No luck getting the sound fixed with different drivers. Seems to be a common issue with my board with nforce 4 chipset, a Creative soundcard and Windows 7. I got frustrated and yanked the soundcard out and went back to onboard sound which is working fine.

Windows is running great, shows all 4 Gb of memory usable, didn't really fix my sound issue, but found a way around it. I'm happy. Thanks again for your help Maguscreed.
My System SpecsSystem Spec
27 Dec 2013   #8

win 7 pro 32 bit
 
 

how do you enable software remapping? As I just put together a new PC, it's the Asus Z9Pe-D8 WS, it doesn't seems to have H/w memory remapping.

and my video card is the Ti Boost GTX 650, which sucks up 2 GB of RAM, plus 230 MB of share RAM

and my OS = win 7, 32 bit

So I should get about 2 GB of Sys. RAM, but I only get 973 MB
My System SpecsSystem Spec
Reply

 4Gb memory (2.75 Gb usable) memory remapping in bios causes BSOD




Thread Tools



Similar help and support threads for2: 4Gb memory (2.75 Gb usable) memory remapping in bios causes BSOD
Thread Forum
Memory remapping enabled causes reboot when waking from sleep Hardware & Devices
Enable the memory remapping feature! Performance & Maintenance
Memory remapping problem Hardware & Devices
Memory has only 2Gb usable Hardware & Devices
adding memory results in less usable memory Hardware & Devices
Installed Memory (Usable Memory) Hardware & Devices
Memory Hole Remapping problems... Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 07:34 PM.
Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App
  

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33