DDR2 Dual Channel Memory

**Galactus** · May 9th, 2009 08:48 PM

Sorry, newbie question lang.

I just bought an HP a6640d desktop. According to the specs sa HP website, DDR2 Dual Channel memory na siya, 800mhz, tapos with 2 memory banks, pero only 1 slot is occupied.

2gigs lang kasi memory niya, tapos on-board pa yung video, so I plan on buying an additional 2 gigs of memory (para 4 gigs na siya) and a separate PCI-E video card.

Problem is, bakit yung nakikita kong dual channel memory sa websites 2 sticks? Paano pa kakasya yun eh only one memory bank is available? Puwede ba pag-haluin yung dual and single channel memory modules? Baka kasi mali ang mabili ko, sayang lang ang pagod.

Baka may PC techies dyan, patulong naman.

**ghosthunter** · May 9th, 2009 09:04 PM

Try Google...

http://en.wikipedia.org/wiki/Dual-channel_architecture

**oj88** · May 9th, 2009 10:03 PM

You can't run dual-channel with just one stick of RAM. You'll need at least a pair of identical sticks to make it work. Otherwise, it's running in single channel mode only.

**rion** · May 9th, 2009 11:43 PM

a single stick will always be a single channel. don't be confused, any pair of identical ddr2 will give you dual channel. as long as the mobo supports dual channel. dual channel kit are just marketing hype.

**aga_cruz** · May 9th, 2009 11:54 PM

search mo muna sa google baka di supported ng board mo yung 4 gig or ram

**oj88** · May 10th, 2009 12:26 AM

Originally Posted by aga_cruz

search mo muna sa google baka di supported ng board mo yung 4 gig or ram

It supports it. (2 x 2GB)

**Galactus** · May 10th, 2009 01:33 AM

Thanks for the replies. Medyo nalito kasi ako sa terminology. My mobo (MSI MS-7525) can support dual channel, pero I guess since 1 stick lang nakasaksak, single channel mode nga lang siya.

**Horsepower** · May 10th, 2009 01:45 AM

bili ka na lang ng isa pang 2Gb stick and it will switch to dual channel.

if you're using a 32-bit OS, you'll only see 3.5gb though.

**squatt3r** · May 10th, 2009 03:00 AM

just make sure that the RAS/CAS timings nung additional memory module na bibilhin mo ay pareho nung naka-install sa desktop mo. you'll be able to quickly see yung RAS/CAS timings using cpu-z

**Macmon** · May 10th, 2009 10:54 PM

try to download the free utility CPU-Z
Makikita ninyo ang slots available and slots used in the utility and what type ang memory so you can state that when buying another RAM