Vista - More Ram?

Before you order more stuff, I suggest you try with the 1.5GB. It will not be ideal because the sticks are probably not matching, but it will be some improvement for sure.

I don't know for sure but I would think so also I reinstall vista quite often like every 3-4 months it keeps my pc fast most times.

You can use a 512mb and 1GB module providing the specs match, otherwise you will face instability issues.

You need to look for:PC25300 NONECC UNBUFFERED 200PIN DDR2 SODIMM

But you will need to ensure the CAS timings match your existing module.

Download CPU-Z:CPUID

and under the SPD tab, have a look at the CAS# Latency Timings. These are the specs you need to match.

Example outlined in red:




Sounds familiar

it'll run fine with 1.5 gig mate , its just hat 2 is better as already mentioned 2 is really the minimum for vista

I've installed the 1 GB stick and it has made a noticeable difference- now there is 800+ MB memory available.I checked with Crucial and they told me I wouldn't suffer any instability (touchwood!) issues as my processor wasn't dual channel.
Thanks for everyones help,
Gads

Practical experience beats all theories. I am glad it worked out for you and your wife. However, I would still make a major cleanup of the startup programs (you can use msconfig or this program which has a nicer GUI: BillP Studios - WinPatrol 2010 ) and clean up the temporary files with CCleaner ( Download CCleaner 2.25.1025 - FileHippo.com ) - but don't touch the registry. That is counterproductive.
PS: if you are not sure which startups to disable, post a snip of your startup programs and we'll be glad to help. But basically you can disable all - nothing negative is going to happen.

Awsome.We had to do that to my ol'lady's (don't tell her I said old)laptop and it had xp but it only had 500 mb ram.Glad it worked so well for you.

some motherboards don't like the mismatch, I would recommend the same size ram.