I currently have a A45-S120 Toshiba Satellite laptop computer, with
256MB of PC2100 266 Mhz Ram, and a
Celron 2.6 Ghz Processor,
I believe the FSB is 400 Mhz
I want to upgrade the Ram. I am running Windows XP home addition.
It has only 2 Ram slots, I intend to buy 1GB of Ram
1) Does PC2700 333Mhz make much of a difference over PC2100 266Mhz?
Based on 333 vs 266, I would assume it to be 25% faster like 125% vs 100%, is that right?
2) Since my 256Ram is at PC2100 266Mhz, the PC 2700 would only run at 266Mhz. Which is better, 1GB of PC2700 333Mhz Ram, or 1.256GB of PC2100 266Mhz Ram?
Does the motherboard support PC2700? If yes, go for PC2700. Because you use Celeron 2,6 Ghz single-core that has 400 FSB, you can use up to memory with 800 speed (DDR2-800/PC-6400) but that's limited by the motherboard's support and slot type (DDR1 has different pins than DDR2).
So yeah, Speed is noticeable as 2100 to 2700 increase is as 100%-125%.
2) 1 GB PC-2700 in this case, since the speed difference is taken to the fullest. But 2GB of PC-2100 is better than 1 GB PC-2700.
Btw, does you motherboard supports PC-2700? Check it out first. If yes, 2 GB PC-2700 is better.
You have PC-2100 in your computer right now and if you get PC-2700 it will work . but the PC-2700 will run at the lowest memory speed which is PC-2100.
Basically, go for the highest RAM speed Mhz your motherboard supports. If your motherboard supports PC-3200, then go for PC-3200. Remember your processor's bus speed is 400 Mhz so you can use up to PC-6400. But if you want to lower budget, go for 2GB PC-2100. It's adequate with peak bandwidth of 2.1 GB/second.