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Windows 7: memory problem

31 Oct 2010   #1
Benbow

Windows 7 Home Premium 64bit.
 
 
memory problem

I am running windows 7 and I have four DDR2 memory slots each with a capacity of 2gb. Since installing Win 7 I have increased the memory from 2 x 1gb to 2 x 2gb with 2 spare slots.
I am trying to install a further 2 x 2gb of identical memory in each of the 2 spare slots but when I boot up about 30 seconds later the machine crashes - no blue screen, a simple lock up.
When I remove the 2 extra memory leaving the existing 2 x 2gb in place the machine boots up and runs normally. Any ideas why adding the extra memory causes a crash?


My System SpecsSystem Spec
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31 Oct 2010   #2
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

There are a few possible causes for this behavior:
  • Bad/defective RAM sticks
  • Bad/Defective RAM sockets/motherboard
  • Insufficient power being supplied to the RAM slots
  • Mis-matched RAM specs/timings (you seem to have that covered)
You can test the individual RAM sticks using Memtest86+ and installing one stick at a time in Slot #1 to run the test. (be sure to mark/number the sticks if they are identical)

You can test the slots by populating the #3 and running Memtest, then #4.

You can test power issues by going into the BIOS and increasing the voltage for the RAM in small increments and testing. Do not exceed any motherboard limit mentioned in your manual.

Hope that helps.
My System SpecsSystem Spec
31 Oct 2010   #3
Benbow

Windows 7 Home Premium 64bit.
 
 
memory problem

I have tested the memory and the slots and all are ok. It will work with 3 x 2gb installed but when I put in the fourth.......crash. Is it something to do with a bios setting?
My System SpecsSystem Spec
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31 Oct 2010   #4
Solarstarshines

Windows 7 Home Premium 64bit sp1
 
 

try switching the sticks around in oppesite slots then boot into bios and check what settings the memory is on make sure it is in accordance for the clock speed of the ram

you might have a voltage issue in one of the memory ports
My System SpecsSystem Spec
31 Oct 2010   #5
zzz2496

Windows7 Ultimate 64bit
 
 

Check BIOS update, most of the time - these kind of problems are solved by BIOS updates...

zzz2496
My System SpecsSystem Spec
31 Oct 2010   #6
EzioAuditore

Winbdows 7 ultimate x64 | Ubuntu 12.04 x64 LTS
 
 

BIOS update and setting the voltage controls to auto. Let the BIOS determine the correct power..
My System SpecsSystem Spec
31 Oct 2010   #7
Solarstarshines

Windows 7 Home Premium 64bit sp1
 
 

Quote   Quote: Originally Posted by zzz2496 View Post
Check BIOS update, most of the time - these kind of problems are solved by BIOS updates...

zzz2496
also to add some bios updates underclocks speeds as well
My System SpecsSystem Spec
31 Oct 2010   #8
bobkn

Windows 7 Pro X64 SP1
 
 

Quote   Quote: Originally Posted by Benbow View Post
I am running windows 7 and I have four DDR2 memory slots each with a capacity of 2gb. Since installing Win 7 I have increased the memory from 2 x 1gb to 2 x 2gb with 2 spare slots.
I am trying to install a further 2 x 2gb of identical memory in each of the 2 spare slots but when I boot up about 30 seconds later the machine crashes - no blue screen, a simple lock up.
When I remove the 2 extra memory leaving the existing 2 x 2gb in place the machine boots up and runs normally. Any ideas why adding the extra memory causes a crash?
You don't list your motherboard type.

Asus, for example, produces a QVL (qualified vendors list) for some of their boards. Some RAM is able to be used in all the slots. Some only is certified for two slots.

You may be able to get your RAM to run by manually setting its voltage and timings in the BIOS setup. It's similar to overclocking the RAM, except you're just trying to get 4 sticks to run reliably.
My System SpecsSystem Spec
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