Memory upgrade situation

[teladoy]

I have a R60 and hoping to upgrade RAM memory.
I check in the BIOS and found I have 2X512
What should I do?

This is what Lenovo says:
Memory
PC2-5300 Non-Parity (NP) Double Data Rate Two (DDR2) Technology
The use of 667 MHz SO DIMM memory is recommended for this system.
256 MB, 512 MB, or 1 GB standard memory
Supports maximum memory up to 3GB
Recommended for memory expansion are 2 GB PC2-4200 DDR2 SDRAM 533 MHz SO DIMM or 256MB, 512MB, and 1GB PC2-5300 DDR2 SDRAM 667 MHz SO DIMM.

Which put me in a odd situation
What is better:
(A) 2Gig of PC2-5300 or
(B) 2.5Gig of 2Gig of PC2-4200 + 512Mb of PC2 or
(C) Ignore Lenovo and get 3Gig of PC2-5300

What is my best choice

Thank you

[Harryc]

Choice C is the one I'd do. I have no idea why they are recommending PC2-4200, it makes no sense. Can you post a link to this advice on lenovo.com?

[teladoy]

Thank you Harryc:
Do to your response I cancel a order in time.
And continue researching and found real advice that i will like to share will all of you.
Her what Crucial recomend:
Maximum Memory Capacity: 4096MB
Currently Installed Memory: 1GB
Available Memory Slots: 0
Number of Banks: 2
Dual Channel Support: No
CPU Manufacturer: GenuineIntel
CPU Family: Genuine Intel(R) CPU T2300 @ 1.66GHz Model 14, Stepping 8
CPU Speed: 980 MHz

So now we know the true perhaps this time.
Let see

Q: Will my system recognize the maximum upgrade?
A: Possibly
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: DDR2 memory with support for DDR2 PC2-5300 speeds.
Q: How much memory can my computer handle?
A: 4096MB.
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?
A: No.
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?
A: No.
Your system does not support dual channel.
Q: Does my computer support ECC memory?
A: No.
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.

[lengendtp]

I have a R60 and hoping to upgrade RAM memory.
I check in the BIOS and found I have 2X512
What should I do?

This is what Lenovo says:
Memory
PC2-5300 Non-Parity (NP) Double Data Rate Two (DDR2) Technology
The use of 667 MHz SO DIMM memory is recommended for this system.
256 MB, 512 MB, or 1 GB standard memory
Supports maximum memory up to 3GB
Recommended for memory expansion are 2 GB PC2-4200 DDR2 SDRAM 533 MHz SO DIMM or 256MB, 512MB, and 1GB PC2-5300 DDR2 SDRAM 667 MHz SO DIMM.

Which put me in a odd situation
What is better:
(A) 2Gig of PC2-5300 or
(B) 2.5Gig of 2Gig of PC2-4200 + 512Mb of PC2 or
(C) Ignore Lenovo and get 3Gig of PC2-5300

What is my best choice

Thank you

I think I also asked the same question.
In the end I just added 1 more gb to make it a total of 2gb.