Question about Ram

[BioAlien]

Hey, not long ago (like 2 week) i posted a tread here, for a question with a motherboard i wanted to buy, and it look like it was deleted...

so i want to know if 400mhz memory will work on my computer, because right now i use 333mhz one.. and i read something about my system that my prossesor is 333mhz or something like that.. so do i need a 400mhz prossesor for ram with 400mhz?
my prossesor(dont look like that though..)
http://www.compuvest.com/Description.jsp?iid=183028
see its writing 333mhz

but do i need a 400mhz one? like this one
http://www.compuvest.com/Description.jsp?iid=183124

for 400mhz ram to work?

[Assassin]

yes, i believe you do.

[BioAlien]

do what? have to buy a new prossesor for 400mhz memory to work?

[darkshadow]

no you wont, in MOST cases higher speed ram will work just fine, it will just work at the lower speed, so even if you do buy ddr400 while your fsb is 333, the ram will just run at ddr333, so it should be fine, it actually better to do so if you plan to overclock you fsb, dont buy ddr2 ram however (533), if your mobo doesnt support ddr2, it wont work

[Deadfire]

no you wont, in MOST cases higher speed ram will work just fine, it will just work at the lower speed, so even if you do buy ddr400 while your fsb is 333, the ram will just run at ddr333, so it should be fine, it actually better to do so if you plan to overclock you fsb, dont buy ddr2 ram however (533), if your mobo doesnt support ddr2, it wont work

Props to Dark on this one.

Yep your memory will dial down to the motherboards specs and of course despite the similar names DDR and DDR2 are NOT interchangeable and are NOT compatible with each other. I may want to note that DDR2-3200 (400) does exist so don't confuse the two.

Dark did talk about over-clocking and memory. Aside from the PC Rating on ram there is also another number or factor thats important to note. This is the Memory CAS latency which refers to the number of clock cycles needed to access the memory. Most mermory will have a rating of at least 2.5 or 3.How you find it when your shopping is in the numbers listed after the model number for a stick. The first number is the CAS of it.

Other things you can do to add the extra punch is changing the settings for memory timings in the BIOS but I'll explain that when it's needed

[BioAlien]

with my current motherboard i can't overcloak, but with my new one (i will have it tommorow) i hope i will be able to, so i can overcloak my fsb to 400mhz, so if i overcloak it, my memory 400mhz will work at normal speed?

[darkshadow]

err overclocking from 333 to 400mhz is almost impossible, thats a 67mhz gain, thats like 134 mhz extra on you fsb! doing that would need some serious proffessional tools, my fsb is pumped up 100mhz extra, and i simply can not go further without some proffesional cooling and stuff

however, if your new mobo already runs at 400 mhz, you wouldnt need to overclock + i can see your old ram ( 333) struggling badly to reach 400mhz, see if your new mobo supports 400mhz