4GB DDR2 800MHz/PC6400. Where to buy? Is it worth it?

Does anyone know where I can get hold of 4GB kits (2x2GB) of DDR2 800MHz/PC6400 RAM (SO-DIMM)? Or even single 2GB modules? Do they even exist?

All I've been able to find is either 4GB DDR2 677MHz/PC5300, or 2GB 800Mhz kits.

Is it worth getting faster RAM? Would I notive much difference? Would my laptop utilise it (ASUS Lamborghini VX2S)?

 

from what I understood, the current santa rosa gen does not support full 800 mhz ram, its simply a 800 mhz fsb

 

Try newegg.com for that.

But your laptop will not utilize it, so it would be a waste to get the faster memory. Also, make sure you have a 64bit OS, otherwise you'd be wasting a whole bunch of that 4 gigs.

 

If that's the case then I'll just stick with DDR2 677 instead

Just out of curiousity, why are there even DDR2 800 SO-DIMMs in the market? What other platforms can accept this type of RAM, Athlons?

 

I don't think there's any notebook chipsets which support 800MHz RAM at 800MHz. It just clocks down to 667MHz. If you do want 4GB, then here's the Crucial kit.

The only reason I would buy 800MHz notebook RAM at the moment is so that I have it to move over to my next notebook. But I would only buy it when the price differential is small.

John

 

Current AMD utilizes the 800mhz SoDimms, but the hard part is not finding the SoDimms, it's finding the notebook with AMD X2 800mhz FSB processors

 

Most DDR2-800 notebooks actually use desktop processors.

 

As I have also tested, even Santa Rosa (965) doesn't fully initialize 400MHz running speed of DDR26400 SO-DIMM, so waste of money...

 

Maybe it's too late to resurrect the thread but I'm lately considering PC2-6400 rams for my laptop. What I'm bringing new is and old experience...

Within my old desktop computer I used to use higher clock speed rated modules with lower CAS latency. Experienced example was using DDR400-CL3 memories in a DDR333- CL2.5 mode. The underclock in mhz resulted in faster CAS cycles... Back then I didn't do it for speed yet can't find matching DDR333 ram when I decided to increase my memory.

Today's PC2-5300 SO-DIMMs are all CL5 (AFAIK). Isn't it possible to apply the same logic here? E.g. experiencing PC2-6400-CL5 SO-DIMMs in a PC2-5300- CL4 (wild guess of CL) mode in a 667Mhz FSB m/b notebook...

Also take a look at: http://en.wikipedia.org/wiki/CAS_latency for some insight. And beware the example given there compares slow-mem+slow-mobo vs. fast-mem+fast-mobo where my example is fast-mem+slow-mobo...

What I'm going to ask are:
1) For those who experienced PC2-6400 modules in their PC2-5300 slots, did you notice a lower CL? Is it possible like I've done before?
2) For all, even if it's possible, say to lower CL5 to CL4, is the performance gain worth its price since PC2-5300 are more standard/cheap?

Thanks... ;-)

P.S.1: AFAIK Underclock->lower CL can only be attained IF the memory module supports it. (not all will do)
P.S.2: Forgive me if I misused some terms. Yet the given example is true...