Question : Problem: memory upgrade reccomendation

I have a HP pavilion zv5330us with 512 MB of RAM (384 with the 128 the memory card automatically takes)  There are two slots, each with 256 in each, and I want to put a 1 GB (1024 same thing right?)...in one of the slots (taking the 256 out first of course :)  I have read and read about what kind of memory to get....

Using Everest Home Edition this is what it says...


Field      Value
Memory Module Properties      
Module Name      Infineon 64D32020GDL6C
Serial Number      030AAE17h
Manufacture Date      Week 52 / 2004
Module Size      256 MB (2 ranks, 4 banks)
Module Type      Unbuffered
Memory Type      DDR SDRAM
Memory Speed      PC2700 (166 MHz)
Module Width      64 bit
Module Voltage      SSTL 2.5
Error Detection Method      None
Refresh Rate      Reduced (7.8 us), Self-Refresh
      
Memory Timings      
@ 166 MHz      2.5-3-3-7  (CL-RCD-RP-RAS)
@ 133 MHz      2.0-3-3-6  (CL-RCD-RP-RAS)
      
Memory Module Features      
Early RAS# Precharge      Supported
Auto-Precharge      Not Supported
Precharge All      Not Supported
Write1/Read Burst      Not Supported
Buffered Address/Control Inputs      Not Supported
Registered Address/Control Inputs      Not Supported
On-Card PLL (Clock)      Not Supported
Buffered DQMB Inputs      Not Supported
Registered DQMB Inputs      Not Supported
Differential Clock Input      Supported
Redundant Row Address      Not Supported
      
Memory Module Manufacturer      
Company Name      Infineon Technologies AG
Product Information      http://www.infineon.com/cgi-bin/ifx/portal/ep/home.do?tabId=1


On Crucial.com memory scan said this

Your Memory
Your computer currently has 512 MB of memory installed; and will support up to 2048MB.
 
Slot 1
256 MB  
Non-parity   DDR PC2700
Slot 2
256 MB  
Non-parity   DDR PC2700
You have 0 empty memory slot(s) out of 2 total memory slots.

That's 2 Gig's right?  I think HP said it would support the 256 in one and a Gig in the other...

Also I e-mailed a site about Hyper-X memory and they said it was not supported by my laptop...

Bottom line...price is not a factor...I want to max out my memory with highest quaily modules possible...I do a lot of gaming and my laptop is really lagging up..

thanks...sorry for the long question...LOTS OF POINTS FOR BEST ANSWER!!!

Answer : Problem: memory upgrade reccomendation

Remove the cover from the memory sockets, so you can see if it is removable or not. Some notebooks do have RAM soldered to the board, but if you have to memory sockets where you can put RAM into, then you can use those slots.