Many RAM questions for upgrading HP dv51** series

Hey guys, I want to buy some new ram for my HP DV51** series notebook. I was looking at some kingston RAM and saw the following:

http://forum.notebookreview.com/showthread.php?t=61785

was wondering if there was a chance that the registered mem (KVR533D2SO/1GR) wouldn't work with my HP -- I will phone hp later, just thought I'd ask if anyone knew off hand

My HP can also take PC2-5400 mem (667MHz), butttt....after reading wikipedia...

http://en.wikipedia.org/wiki/Intel_core_2

Does this also apply to intel core (not core 2?)...I'm pretty sure it does -- my hp isn't core2 -- it's just intel core, but I just wanted to check...

I'm thinking that I will go with the PC2-4200 (KVR533D2SO/1GR) or even PC2-3200 (KVR400D2S31G) because the the latency is lower and my hp uses main mem for the video card.....and I figure the lower latency couldn't hurt....

Last thing: would the registered mem cause a problem with the video card since the video card is using the main mem? (geforce go 7400).

Thanks for all your help and looking forward to reading your comments!!

Regards,

Jonathan987

Edit:// forgot to mention PC2-5400 mem is CAS=5, PC2-4200 mem is CAS=4 and PC2-3200 mem is CAS=3...

 

can anyone add their 2 cents?

 

i would just get highest ram speed if the system can support (in ur case 5400?)

i personally would not get reg.mem (unless it is really cheap)- this is to me purely server area

lower CAS does not necessarily translate into better/faster performance - quoted
"...CAS Latency only specifies the delay between the request and the first bit. The clock speed specifies the latency between bits. Thus, when reading bursts of data, a higher clock speed can be faster in practice, even with a worse CAS Latency.

For example, consider a 133 MHz CL3 device (7.5 ns per cycle, 3 cycles request latency) versus a 100 MHz CL2 device (10.0 ns per cycle, 2 cycles request latency). The first bit would be available after 22.5 ns (7.5 ns * 3) on the CL3 device and after 20.0 ns (10.0 ns * 2) on the CL2 device, demonstrating the benefit of a lower CAS latency. However when reading a burst of even 4 bits, the higher clock speed wins: 45.0 ns (7.5 * 3 latency + 7.5 * 3 bits after the first) versus 50.0 ns (10.0 * 2 latency + 10.0 * 3 bits after the first). ..."

my 2 cents

cheers ...

 

thanks man