Having problems with your Sony VAIO PCG-K25 Notebook ?

Vaio PCG-K25 Odd Problems with Upgrades (hard drive and memory)

\015 OK, so my wife inherited a Sony Vaio PCG-K25 that once belonged to my father. Late last week the computer began notifying her of an imminent hard drive failure. I took it upon myself to fix that problem, and thought that I'd upgrade the memory at the same time.\015\012\015\012I cloned the harddrive using HD Clone, which will also expand into the larger drive. I upgraded to a Western Family 250G drive. That seemed to go prettty smoothly.\015\012\015\012I then installed the new memory, Patriot 512's PC2700 SO DIMM, one in each slot, for the maximum supported of 1G. (1024) (this was the only compatible memory that Fry's had in stock). Here's what is interesting. With both sticks installed, the computer only recognizes a total of 448M of memory. I wondered if perhaps either one of the cards was bad, or one of the slots, so I pulled them out and tried one at a time. For each card, in either slot, if they were installed alone the computer only recognized 192M of total memory. This was true if Stick A or B was in Slot A or B. When I install both, we're back up to 448M total.I ran a memory diagnositic tool, which tested the memory at boot (I used Memtest86+) and found no errors. Good, because it's brand new memory, but it didn't really help solve the problem.\015\012\015\012Booting into the bios to see if I could change settings within did no good, there was VERY little access to anything of significance.\015\012\015\012I'm stymied. The thing boots and runs, but SLOOOOOOOOWLY. Much more slowly than before the upgrades. I'm wondering if it's a matter of flashing the bios to accept the larger drive (maybe I was too ambitious?), but as I've never attempted personally, it's a step I didn't want to jump into without some guidance.\015\012\015\012Oh, lastly but perhaps importantly, prior to the upgrade the computer was constantly low on virtual memory. I went in and custom set this at initial/maximum of 4098M, figuring that with a huge harddrive there was no point not using some of that extra space for Virtual memory. Might this have been my mistake? But if so, why?\015\012\015\012Thanks all, in advance, for the assistance!\015

Answers :

There is always a catch with Microsoft operating systems.\015\012
\015\012You must be using Windows Vista.It has a habbit of eating away a part of the memory installed.\015\012
\015\012
\015\012secondly,\015\012
\015\012
\015\012The performance benefits are pretty severe, and immediate. So lets see.. with the danger of sounding unintelligent by explaining this so anyone can understand, forgive the layman terminology. 

1) Microsoft 32bit systems like XP/Vista have a limit on how much RAM they can utilize.
2) Get (www.superspeed.com/desktop/ramdisk.php) Ramdisk Plus for $34.95 (otherwise you're throwing money out by not using your extra RAM anyway :P) 
3) If like me, you have 8GB RAM, the BIOS should register around 8192MB.. 1MB allocated to BIOS, 2900MB for Windows.. that leaves 4-5GB available to set as a Ramdisk - eg. Z:\\ 
* In Ramdisk Plus you have to allocated 'unmanaged' RAM otherwise it will try to use the RAM Windows is using. 
4) Open System Properties (right-click My Computer on Desktop) --> Advanced --> Performance [Settings] --> Advanced tab --> Virtual Memory [Change] -->Click your Hard Drives and check "No Paging File" then "set" .. Click Z:\\ (Ram Disk) and choose Custom Size -- Initial Size 5000.

\015\012
\015\012
\015\012Hope that would help you.
For clariffication:

may i know if the memory module was both new?

try to re-seat the memory module.
try to boot the unit using only on memory and test it again to another

post back here again
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