hi..i got a question about locking the PCI-E frequency when changing the FSB frequency.
here is my condition:
- my proc is pentium D 2.66, i change the fsb to 150 means OC to 3.0Ghz
-in bios, the setting for PCI-E is set at auto, from wat i heard, it is better to set PCI-E at 100Mhz and PCI at 33.3Mhz if we OC right?..but when i change the fsb to 150 and set the PCI-E to 100 and restart the pc...the bios automatically set both fsb and the PCI-E bac to the original one..wondering why?..

*for ur info, the mobo i using is Gigabyte which can be found on my sig.

the 2nd question is..is there any harm if we just put the PCI-E to auto?..thanx

This post has been edited by ciohbu: Aug 16 2007, 02:00 AM

probably it's just that your cpu cannot cope up with the speed.

I don't have PCI-E yet but for AGP, it is usualy advisable to manually set to 67Mhz.

As such, I guess it is better to put the PCIE at 100Mhz manually.

However, I did come across forumers saying that sometimes the locking frequency is different. For ATI cards, it is 105Mhz and for Nvidia cards, it is 101Mhz. However, these are unconfirmed reports. Kindly google around and see.....

This post has been edited by kmarc: Jul 16 2007, 07:48 PM

you should manually set it to 100 mhz,

if you are overclocking while setting to auto
the pci bus speed will increase also thus possible to cause damage to your video card

omg... i didn't set my pci-e or pci bus speed before...

nowadays, all the mobo has the pci speed being locked already, right?

i thought all PD FSB are 200 at stock... Gigabyte mobo got auto reset incase ur OC not stable... most good mobo have already by now...

hmm..but wat i heard is PCI-e frequency is 100Mhz wor...ya.i think bcoz of this auto reset then i cant seem to lock my pci-e at 100Mhz

Yup ... Should lock the PCI-E (100Mhz) when u come to overclocking.
It might spoil your graphic card and sata hdd when the frequency is too high.


-pWs-

PCI default frequency is 33MHz, AGP is 66MHz, PCI-E is 100MHz. Lock it to those frequencies if possible, as stability is better that way. Besides, increasing the PCI/AGP/PCI-E frequency gives virtually no increase in performance.


Must be a really unlucky Pentium D if it can't overclock. Even with stock cooler most can hit 3.4-3.6GHz, even 4GHz is possible with better (but still affordable) cooling. Motherboard more likely the problem.

Thus, locking the pci-e to 100MHz makes the card more stable larr? i read somewhere that increasing it a bit, like add 1 more MHz can make the card more oc'able.. fact or myth?

i increase to 110mhz to give a boost on pcie bandwidth ..i think it should not be over 120mhz

mine set manually at 115 in bios...but reading by clockgen will display 104 tentatively...

yeah... PCIe is 100... at stock... but ur proc FSB is 200 ma...

hmm..i dun get wat u mean..

It got to be manually locked.

PCIe stock @ 100Mhz and FSB stock @ 100Mhz

hmmm..i tried a few times..with this pci locked at 100mhz on my mobo..i cant get higher oc , the max i can get is 2.99ghz only..how come ar?..any idea?

Juz set it @ auto will do. no point tinkering it

3ghz is probably good enof with ur giga cooler. Smithfield is hot.

tat sigma series already outdated lor... time to switch to GA-945GCMX-S2

hehe..finally manage to get 3.0GHz with my pcie frequency locked...but have to set it abit higher, around 101 or 102 MHz



This post has been edited by ciohbu: Aug 16 2007, 02:03 AM