Hi, I have a question regarding about the DDR2 533Mhz RAM, both PC24300 & PC24200 runs at 533Mhz, what's the major difference between the two? Beside that PC2 4300 almost double the price ofr PC24200. THanks

I think PC24300 is ECC.

Nah it's not, it's Non-ECC for both. Any other idea guys?

A little googling and the only price differences I found were the other way.
Example look here:
http://pc-memory-upgrade.co.uk/memory/ddr2-533.asp If you are seeing an almost double price difference then you may be looking at different size sticks/kits. Most listings I found for PC2 4200 and 4300 show identical specifications as far as FSB, voltages and CAS figures but one technical report indicated a particular brand of 4300 supports both CAS 4.0 and 3.0
A lower CAS figure is a faster performance, but I don't know enough to tell if that alone would account for any price difference. It certainly does in other cases I've read. The lower the CAS rating the higher the price.

Give a man a fish and you feed him for a day.
Teach him to fish and his wife will never forgive you.

No I wasn't look at the different MB stick and PC2 4200 do have CAS 3 memeory also. And I know that the lower the CAS the faster it runs. The only difference I know before asking was that the price was different and also PC2 4200 has Bandwidth of 4.2GB/s and PC2 4300 has Bandwidth of 4.3GB/s. They do have the same FSB, so I don't know what's up with this thing having 4200 and 4300.

Where exactly are you looking that has 4300 at double the price of 4200. Every site I look the prices are comparable and usually the 4300 is slightly less expensive..
The difference between 4200 and 4300 may only be a labeling issue. Eg I run pc3200 in Dual Chanel mode based on FSB of 400. Motherboard base FSB200 x 2=400 x8=3200.
What you are looking at is Motherboard base FSB266x2=533 x8 = 4264 Some for marketing purposes call it 4200 others call it 4300.
Look here:
http://www.techbuy.com.au/searchcat/MEMORY_DDR-2_RAM.asp
The fourth and fifth items down show corsair 1024 mb 4300 at AUD$478.80and 1024mb 4200 at AUD$289.55 but the kicker is in the fineprint. The 4300 is a twin pack containing 2x1024 sticks. Double the amount of ram at way less than double the price.

Give a man a fish and you feed him for a day.
Teach him to fish and his wife will never forgive you.

Ok that make sense Richard

http://www.newegg.com/app/ViewProductDesc.asp?description=20-145-528&depa=1

http://www.newegg.com/app/viewProductDesc.asp?description=20-144-170&depa=1

The reason is that Kingston's Hyper seris RAM with Cas Latency 3-3-3-10 kicks ass that's why it's double