how does Ram(memory) work?

[CntrlAltDel]

guys i have a 1gb kingston ram:

Field Value
Memory Module Properties
Module Name Kingston KTC1G-UDIMM
Serial Number B9CC168Ah (2316750009)
Manufacture Date Week 6 / 2009
Module Size 1 GB (2 ranks, 4 banks)
Module Type Unbuffered DIMM
Memory Type DDR2 SDRAM
Memory Speed DDR2-800 (400 MHz)
Module Width 64 bit
Module Voltage SSTL 1.8
Error Detection Method None
Refresh Rate Reduced (7.8 us), Self-Refresh

Memory Timings
@ 400 MHz 5-5-5-18 (CL-RCD-RP-RAS) / 23-42-3-6-3-3 (RC-RFC-RRD-WR-WTR-RTP)
@ 266 MHz 4-4-4-12 (CL-RCD-RP-RAS) / 16-28-2-4-2-2 (RC-RFC-RRD-WR-WTR-RTP)
@ 200 MHz 3-3-3-9 (CL-RCD-RP-RAS) / 12-21-2-3-2-2 (RC-RFC-RRD-WR-WTR-RTP)

Memory Module Features
Analysis Probe Not Present
FET Switch External Disabled
Weak Driver Supported

Memory Module Manufacturer
Company Name Kingston Technology Company, Inc.
Product Information http://www.kingston.com/products/default.asp

kk now what i wanted too know does the ram have too be the exact same frequency EG 400mhz, 800mhz ETC..
and should they both be the same size if i wanted too buy new ram?
Please reply..
Thanks for reading

 

[ChilliGirl]

you cant mix DDRI with DDRII or DDRIII RAM.

You can mix for example DDRII 667 with 800

but

then remember that the RAM will run at the slower speed.

You can mix brands but some brands dont ''like'' being mixed with others. It's done on a trial & error basis.

 

[nakedpeanut]

I would if I was you, (considering your other thread) sell your 1GB and buy 2x2GB. Or do you plan on upgrading your whole system soon? If yes then I'd just buy another 1GB for now.