I mate
well, first of all,i have this board ( P5B de luxe)for about 1 month
at firts i have some troubles ,but I update the bios two times,last bios 910,and now everithyng is fine
I read somewhere that board has some " hole" of instability and lack of performance between fsb 330 and fsb 400 .like you said because the problems with the " strape" 1066 or 1333,cause the board assign the strape in auto mode
but seems last ASUS bios solves this problem
anyway I avoid to use this fsb between 333 and 399
Along with the ASUS P5B de luxe, I bought a CPU Intel Conroe Xeon 3050 ( it is like a E6400) and Ram Geil Ultra PC 6400 ( 2x512MB) rated 1.9~2.1V
I try the system to boot at 333fsb x 8 ( max multiplier of the cpu) mems 1:1 vdimm1.9V - fine
then at 400fsb x 8, mems at 1:1 vdimm 2.1- fine
I do some testing with SP 1M and the system was very stable
then I try 450fsb x 8, but the the boot frezzes
so I give some more Voltage to the Ram ( 2.2) more Vcore 1.4V and a little more voltage to the chipset
try again- 450fsb x 8 mems 1:1 - boots fine,the system seems fine but when I do SP 1M I get errors( mems problem)
I try 500fsb x 8 ( 4000 mhz)but no chance to boot- the system blocks completely
So I try again with 500 fsb x 7, mems at 1:1 - the system boots fine,but some errors in SP 1M
I even try 530fsb x 7 , mems at 1:1 - boots fine,works fine but no way to do SP 1M
After that i see that my board and cpu could go to a high fsb (500 and more) but the Geil Ultra PC 6400 only is stable at around 400 fsb ( maybe a little more),with 2.1V / 2.2V( I have more options on Vdimm on the board, like 2.5V or 2.55V but I do not want to " fry" the ram)
So I do a little "gogling" and find that the best ram to overclock ( without been too expensive like the chips rated PC 8000 or even PC 8500) is PC 5300 with Micron D9 GMHC chips
I now some friends ,who got great results with Team Extreem PC 5300 8-3-3-3 - like 550 / 560fsb ( DDR 1100 / DDR 1120) but they use high Vdimms ( 2.45/ 2.5V) - they are " fanatics overclockers" who does not mind to push the hadware to the limits
,and many times they get " dead" boards and ram
in my case ,I just want to overclock to a reasonable limit, wythout to use overvoltage in the chip´s
So I find that the Crucial Ballistix PC 5300 have the same chips as the Team Extreem PC 5300 ( by the way Team Extreem PC 6400 have the same Micron chip´s)
anyway I decided to try this Crucial ( and the price is very good too)
and they did the job
they are rated 2.2V ,but for overclocking to a at DDR 1000, i gave them a little mors voltage like 2.3 / 2.35V
And now I can do SP 1M at 480/ 500/ 520fsb with the system very stable
and that with a ram rated PC 5300 (DDR 533)
fenomenal sticks of ram
some pics:
PS - one thihg I forget to say
the cpu Vcore default is 1.30
wyth this vcore I can get the cpu to overclock to 2800 / 3000 mz stable
but to do 400fsb x 8 3200 mhz stable-( i´m using that speed 24/24) i need to up the vcore at 1.35V
and to do 480fsb x 8 satble i need to do 1,48/ 1.5V to the cpu
but not all the cpu´s are the same, some need more voltage to overclock at high speeds
but at 1.5Vcore the temps go up very fast, and with air cooling like i have i thing is not good for the cpu life spam