Does most DDR333 sticks run stable at DDR400 speeds?

[StrangerGuy]

Anyone?

 

[imported_miahallen]

If you relax the timings, most of it will.

 

[Lonyo]

Cheap stuff likely won't.

 

[aka1nas]

CAS 2.5 PC2700 will usually do PC3200 speeds @ CAS3

 

[chinkgai]

if by most, u mean more than 50% out there, i'd say no

chances are pretty good though im sure, with relaxed timings like others have said

 

[lopri]

Originally posted by: chinkgai
if by most, u mean more than 50% out there, i'd say no

chances are pretty good though im sure, with relaxed timings like others have said

I'd disagree. I can't say for sure since I haven't seen any statistics on this issue (no one buys DDR333 these days I assume), but If I think about it it's like OC'ing from 166MHz to 200MHz. While percentage wise it's around 20%, the clock itself is only 34MHz. I'd say most quality DDR333 will do DDR400 with the rated timing (@DDR333), or with relaxed timings at worst. The ones won't clock are probably some generic ones which are not stable even at their rated speed (DDR333) /timing.

On a second thought, I'd guess it'll depend on the ICs used. I have no clue what kind of ICs were popular 2~3 years ago, but if something like today's BH-5 type of ICs were used, it probably won't clock very well higher than rated. But most Samsung-made ICs will OC with voltages/timings adjustment. The one IC that I know of is TCB3 which was popular for PC2700 modules. SPD is mostly 2-3-3-7@133MHz/2.5-3-3-7@166MHz. I own a set and it does 2-3-3-7 up to 200MHz (195MHz for 3D stable), and 2.5-3-3-7 up to 230MHz. So I'd say you need to find out what type of ICs your DDR333 sticks are made from.

lop

 

[chinkgai]

i made my speculation because when u think of the MAJORITY of ram out there (think dell, emachines, compaq, whatever) or older intel based systems that use pc2700...i'll bet they use pretty generic stuff

then again...this is all speculation and there really is no way to prove any of this

jes google the type of IC in question or even easier...memtest whatever sticks ur wondering about

 

[aka1nas]

Part of the reason that people say most sticks can do it is that it took JEDEC a fairly long time to ratify DDR400 as an official spec. For a while, PC2700 was the fastest official speed grade you could buy as PC3200 was not yet official. Many people found that their PC2700 would easily hit PC3200 speeds which makes sense as their was no speed binning going on for a higher speed grade then.

 

[hans007]

i think if you buy ddr333 now that is cl2.5 you should easily be able to do ddr400 cl3 .

when ddr333 first came out this wasnt the case, but well most chips that are ddr now, have significantly high yields than those chips that came out 3 years ago.