Background
This has been going on since Memory Day weekend. My cousin called me to see about adding some memory to his Fujitsu LIFEBOOK A6025 Notebook PC.
Problem
Whenever he boots the computer with the new memory sticks installed, the computer boots up and goes through the BIOS, but Microsoft Vista is in Neverland.
Memory
System 2 – 2GB 200 PIN SODIMM 256MX64 DDR2
Memory Chip Listing Deciphered
256MX64
First was is 256MX64?
- What 256Meg X 64 On Memory Specs Mean?
http://www.xtremesystems.org/forums/showthread.php?277130-What-256Meg-X-64-On-Memory-Specs-Mean
- 256megx64 means that it has chips that are 256MB and it is 64bits wide on the data buss
- So a single sided stick hats 256Mx64 means its a 2GB stick (256MBx8chips=2GB/2048MB stick), a double sided stick would be 4GB (256MBx16chips=4GB/4096MB)
The key point is 64 bits bus
What is our MS Windows OS
Placed the old chips back in and let us determine the bitness?
Access “System Information” via “Accessories” \ “System Tools” \ System Information
Here is the System Information:
Quick Points
- The System Type is X86-based PC
And, so we know that we are running a 32-bit OS.
What type of CPU ?
Fijitsu
Access Fijitsu web site :
- LIFEBOOK A6025 Notebook PC – Technical Specifications – LifeBook® A6025 Notebook
http://support.fujitsupc.com/CS/Portal/supportsearch.do?srch=TECHSPECS&Series=A%20Series&Model=A6025&ProductType=Notebook%20PC#4
And, here is machine’s key specs:
Intel
Accessed Intel’s web site to determine the bitness\Instruction set for the T2450:
Intel® Core™ Duo Processor T2450 – (2M Cache, 2.00 GHz, 533 MHz FSB)
http://ark.intel.com/products/29752/Intel-Core-Duo-Processor-T2450-2M-Cache-2_00-GHz-533-MHz-FSB
Summary
May be it is just me, but though the two vendors’ insists, I just don’t see how a 64-bit memory chip will work with a machine that has a 32-bit bus.
