Suite aux grandes discussions au sujet du support de la DDR333 par l' i845e, j'ai essayé d'y voir un peu plus clair. Et j'ai trouvé ceci:
Hi all,  
 
Here is a "reliable, if not the most elegant" way of using the 3:4 CPU:memory ratio at FSB's higher than 132 MHz. At least, I'm pretty sure that's what it does... unfortunately, I don't quite have the necessary stuff to test it. I can verify that it does work at 133 MHz- which is hardly noteworthy- but I would like somebody with a P4B266 and RAM capable of > 177 MHz to test it out, if it's not too much trouble.  
 
This could very well have been posted before... I didn't thoroughly search for it, though, since a couple of recent posts here have indicated that people are not aware of this solution (which would therefore suggest that it has not been posted ).  
 
Anyway... it will involve using the dipswitches for overclocking, which mightn't be to your liking. (I have found that this makes my system seem speedier and smoother anyway, for whatever reason.)  
 
Here we go:  
 
[1] Set your system to "jumper-free" mode, and set your FSB to 132 MHz (or anything below that). Set the CPU:Mem ratio to 3:4. Save changes to CMOS and power down.  
 
[2] Set your system to "jumpered" mode and set the dipswitches to your liking. Use this thread as a guide to > 133 FSB's.  
[I would recommend using the OVER_VOLT jumper if you need more than 1.5 V of Vcore. You cannot select a custom Vcore in dipswitch mode, but this jumper should boost it to around 1.65 V or so. Also, setting the RAM voltage to 2.7 V (using DDR_OV) might be helpful.]  
 
[3] Power back on and see what speed your RAM is running at!  
 
Hopefully- if the behaviour of my system is anything to go by... you will have the 3:4 ratio at your FSB of choice. As said earlier, however, I would like someone to confirm this for > 133 MHz FSB speeds.  
 
The downside? You can't save any BIOS changes- even non-O/C-related ones- without the system reverting back to 1:1. For me, this is not a problem, as I don't need to change mine regularly and am able to quickly access the jumpers to switch things back on the odd occasion that I do.  
 
I have been running my system this way for months with no problems. My Crucial PC2100 seems quite happy at 177 MHz... which I assume is what it runs at, but won't know for sure until I have an i-Panel. Sandra benchmarks definitely confirm that it is running higher than 133 MHz, however. (Actually, I have been using 1:1 for the last few weeks, since I was worried I might be pushing my RAM too hard and haven't been doing anything particularly memory-hungry... but I'll probably switch back to 3:4 shortly. I've seen people pump far more than 0.2 extra V into their RAM! )  
 
Hope this helps somebody. Would love to hear from anyone who tries it > 133 MHz.  
 
-Bon
    J'ai effectué la manip en question et ma DDR333 Samsung tourne bel et bien à 373Mhz !!!
Voilà et je ne comprend donc pas pourquoi on nous fait tout un foin avec ce pseudo "support ddd333"
 
Expliquez moi votre point de vue la dessus.  
 
Bien à vous  
 
raydi

Quelqun peut confirmer ?
 
Merci

hmmmm ...
ou comment éviter de prendre une P4B533-V avec un chip video dont on a pas besoin !

raydi > tu peux passer par mon topic pour écrire tes perfs, stp ?
 
http://forum.hardware.fr/forum2.ph [...] h=&subcat=

j'ai essaye la manip sur ma asus p4b266, win2000 plante au bout de 30 secondes  

raydi > c'est bien stable, chez toi ?

l'avantage de la P4B533-V c'est que tu peux règler le ratio sur 3:4 sans faire de manip, et que tu disposes en plus du ratio 4:5
ce qui te permet beaucoup de choix de règlages pour les vitesses processeur et mémoire