Accessing BIOS on P4SD-VX

ok.....thx mates it's...realy cool from you to help me....

so here am I. i've got a VAIO RS-302, my motherboard is an Asustek P4SD-VX, my CPU a 2.80 Ghz northwood Hyperthreading on socket 478. the northbridge chipset is Intelspringdale i865PE...
The problem is:
a firne dof mine has given me 512 mo RAM PC3200 . but it was on his older PC and he had downclocked it to PC2600. i have alsoo two infineon 256mo ram PC3200 dual channel that have been downclocked because of the other one who is still at 2600. i would like to overclock the 512mb to stop to get powerloss. But the main problem i have is that i can't access the bios (american megatrend Inc. version 2002 of 512kb.) with the keys like Suppr, del, backspace etc...
Can anyone help me?

Just out of curiosity, what company the ram made by?

Nope and you won't be able to do that manually, frequency by frequency, because all you got there are date base and pre made modes (among other tweaks as well) you will probably see a button called "best performance" or "default setup" or any other of that, these are the modes that you can chose. It adjusts the system fully to what ever you have selected, (optimized for best/default or any other) it applies on to frequencies of the CPU and RAM, for over clocking and resulting problems. (By using the "default setup")

Try it if you have those buttons.

Just try some buttons. Most of the time it says wich button it is. But try:

F2
F8
F10
F12
Del

ok first of all thanks to reply, second , my stock ram is 2x256mb PC3200 ddr400 from Infineon , the ram my friend gave me is some PQI ....i dont know realy..he says it's samsung, but it doesn't support performance mode so..i'm perplexed...

YYYEEEEAAAAHHHH!! thx Hasse, that was the F2 button that i was sure i had tried before....doesn't matter. something is making me *****. i cant change anything in the bios. i cant change the fans speed, the core voltage, the latency of my memory.....