Windows 7 x64 – How to test the memory

Go into the BIOS, under CHIPSET then go to MEMORY HOLE MAPPING and enable it them save setting to CMOS and reboot. Also go to MSCONfIG BOOT TAB and mke sure MAXIMUM MEMORY is UNCHECKED. That should fix this issue. It fixed it on my Gateway desktop. Hope this helps. (Added by Motodude)

I would see if your BIOS has an "Integrated Peripherals" section. My understanding is that memory mapped devices in x64 operating systems can occupy address ranges outside of your System RAM.

Integrated graphics can and usually does eat into system RAM, though...as it represents actual memory needs. 768MB is a lot, though.

I use Win7 x64 and I have 8GB addressable out of 8GB. Does the system manager say "64 bit operating system" anywhere under how much RAM it shows installed? (My computer, properties). If it doesn't, you could be using the x86 version and not the x86-64 version.

I managed a few hits. The key to passing the damaged memory parameters are:

1. Addresses memtest86, match addresses used in Windows.

2. Must mark full pages of 4KBytes.

3. In memtest 0x10000000, corresponds to 0x10000 in Windows.

4. In memtest, 0x00001000 corresponds to 0x1 in Windows.

5. Means: The page number in windows removes the last 3 memtest hexadecimal numbers.

6. Means that: Windows eliminates zeros in the left.

7. Consider 5 and 6, to avoid errors in the page numbers.

8. The correct statement is: bcdedit /set {badmemory} badmemorylist 0xB7 0xB8 0xB9 0xBA to errors in memtest from 0x000B7000 to 0x000BAFFF. Note that you cannot put a range of memory, but all pages one-by-one.

9. Cannot add pages; all pages should be marked in the same command. If it's a new page, adds overwrite older ones. I managed to add 4096 pages in only one command. I have not tried more.

10. bcdedit / enum {badmemory} shows the list of marked pages.

11. bcdedit / set badmemoryaccess no prevents the marked pages from being used.

12. It is necessary to reboot after marking pages and remove access.

Now it runs without crashing.