Aspire Revo 3610 4GB Memory problem

My AspireRevo 3610 works perfectly stable with the stock 2GB RAM (2 x 1GB, Unifosa, Elpida E1108ACBG -8E-E chips). Recently i had upgraded my memory from 2 GB to 4 GB. It is NOT stable with 4GB RAM (2 x 2GB, Kingston Platinum Series DDR2, Elpida E1108AFBG -8E-F chips). Now, I'm having a stability issue with my Aspire Revo 3610. I have tried two different sets of Kingston memory, in case it was the replacement memory that was faulty. Can any one tell me that how do i resolve my Aspire Revo 3610 4GB Memory problem? Does any body knows about it? Kindly help me out to resolve the above issue. Thanks.

The AS3610 uses the Atheros XB91 (AR900x) chipset which does support 802.11N. Of course, it only supports N at 2.4GHz. Aspire Revo R3610 is a compact PC that uses very little desktop place and is ideal for basic computing tasks and web browsing.

The private process address space is still only 2GB and is reported as such. The PAE switch does not give more memory to the kernel. Some applications support the /3GB switch in boot.ini, but mainly server applications, not games. If you have more than 2GB the remainder is used by the OS instead of paging out the OS to disc when resources are low. It only gives more to the user-mode application processes. All PAE does is “trick” the application into thinking it has more space by creating multiple page tables for each application.

I believe the Kernal is reserving some of that RAM for its own purpose, just like how 2GB was set aside for the kernal by default on Win32. In fact, using the PAE switch is bad in Terminal Server environments because each application will require 4 times as many page tables, which comes out of the limited 2GB space. The only real issue may be the hardware (HW). If the motherboard's memory bus and/or BIOS can address 32 bits then it will use all of the memory, but some motherboards/BIOS don't. If I were you, I would remove 2GB of memory so that you have only 4 total, and stop using the PAE switch.

I have tried other slots and have same problem. Like stated before, I have already rma memory once. Old OCZ memory works fine, but is only 2gb. WinXP-64 can address more than 4.2 GB, however in some cases the same issue of the BIOS and memory bus again come into play. Some cheap motherboards have the capability of running a 64-bit CPU but they run it on a 32 bit bus bringing into play the 32-bit issue.

The only real issue may be the hardware (HW). Have you tried running one stick of the new memory with both sticks of the old - just to see if it works?If the motherboard's memory bus and/or BIOS can address 32 bits then it will use all of the memory, but some motherboards/BIOS don't. If not - try each new memory separately and maybe several slot combinations. You might also try one stick each of the new and old. If the HW does not see the memory you may have the wrong type of memory for your HW. If it see the memory but only shows 2.1 GB then there is either a HW or BIOS restriction on the number of memory address lines available.

I too have a Revo 3610. It was manufactured with 4G of RAM and Windows 7 Home Premium 64-bit. Clearly, this is the best case: it should be supported by Acer since they put it together.

Windows claims that the machine has 4 GB of memory but that only 3 GB are useable. I know that 256 MB are tied up as the video buffer (the size can be set in the BIOS setup screen). That leaves 0.75 GB unaccounted for.

Linux shows 3.25 GB of main memory and 256 MB of video buffer (I look at /proc/mtrr to see the memory mapping set up by the BIOS). That leaves 0.5 GB unaccounted for.

I think that the problem is that the BIOS does not offer the option "Memory Hole Remapping". That would move the address range of some of the RAM out of the way of PCI addresses used for devices. That would make the memory available to 64-bit OSes and 32-bit OSes that use PAE.

I'm talking to Acer support about this. I'm not the first.