Hi guys, thanks again for your help.
OK, I did the Crucial scan and here are the results (below). It appears that I can get memory of up to 2GB (two sticks of 1GB each? would that be best?)
If anyone could recommend the best memory to buy - at a good price, I'd be really grateful.
Here's what crucial.com said:
Guaranteed-compatible memory upgrades for your Crucial Scanner Results Standard VIA K8M Motherboard .
We were not able to determine the manufacturer and/or model of your PC, but we were able to complete our scan with information from your motherboard.
512MB current memory removed *
2GB new memory added
£45.98 inc. VAT*
Part No: CT12864Z335
£19.99 ex. VAT
£22.99 inc. VAT* ea.
Total Price: £39.98 ex. VAT
£45.98 inc. VAT*
Maximum Memory Capacity: 2048MB
Currently Installed Memory: 512MB
Available Memory Slots: 0
Number of Banks: 2
Dual Channel Support: No
CPU Manufacturer: AuthenticAMD
CPU Family: AMD Sempron Processor 2800+ Model 12, Stepping 2
CPU Speed: 1599 MHz
Q: Will my system recognize the maximum upgrade?
How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. More information about OS memory maximums can be found at http://www.crucial.com/kb/answer.aspx?qid=4251
Q: What memory goes into my computer, and can I mix speeds?
A: DDR memory with support for DDR PC2700,DDR PC3200 speeds.
Because DDR memory is backward-compatible, you can safely upgrade your system with any of the guaranteed-compatible DDR speeds listed below, even if your manual calls for PC1600 or PC2100 speeds.
Q: How much memory can my computer handle?
Adding the maximum amount of memory will improve performance and help extend the useful life of your system as you run increasingly demanding software applications in the future.
Q: Do I have to install matching pairs?
No, you can install modules one at a time, and you can mix different densities of modules in your computer. But if your computer supports dual-channel memory configurations, you should install in identical pairs (preferably in kits) for optimal performance.
Q: Does my computer support dual-channel memory?
Your system does not support dual channel.
Q: Does my computer support ECC memory?
Your system does not support ECC. Because ECC and non-ECC modules should not be mixed within a system, install the same type of modules that are already in your system.
Then it recommends the following 1GB sticks:
Part #: CT12864Z335 • DDR PC2700 • CL=2.5 • Unbuffered • NON-ECC • DDR333 • 2.5V • 128Meg x 64 • • more details
Part #: CT12864Z40B • DDR PC3200 • CL=3 • Unbuffered • NON-ECC • DDR400 • 2.6V • 128Meg x 64 • • more details
Thanks again, guys. I look forward to hearing from you!