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KS
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OC Newbie
15 Jahre dabei !

AMD Athlon XP
1533 MHz @ 1866 MHz
43°C mit 1.6 Volt


I think that the main source of my problem in overclocking is the instability of the PCI/AGP bus i.e. the PC does POST correctly but the OS won't boot up (sometimes the OS is booting and the PC restart itself over and over again). At the freq between 101-130 and from  134+, the PCI and AGP freq deviate from 33MHz. I heard that ABIT m/b could implement the PCI/AGP freq locking. IS that possible in other m/b e.g. ASUS, ECS?


A7V8X, AMDXP1800+T-bredA

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16 Jahre dabei !

Intel Core i5
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40°C mit 1.10 Volt


hmm..

restarting while booting can also have other causes .. ( i.e. too high RAM Frequency or instable PowerSupply )

if your mainboard has this function it should be in your BIOS or there are some jumpers on the board ( see manual )

but normally the AGP / PCI is set by the FSB


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KS
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OC Newbie
15 Jahre dabei !

AMD Athlon XP
1533 MHz @ 1866 MHz
43°C mit 1.6 Volt


I read the datasheet of the clock generator which says that the divisor (any numbers) could be set via I2C by setting certain bits to the registers. This would make it possible. But I don't know how to do that. I guess it got to be something that is hidden in the BIOS.


A7V8X, AMDXP1800+T-bredA

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16 Jahre dabei !

Intel Core i5
3500 MHz @ 4000 MHz
40°C mit 1.10 Volt


i said..

BIOS or not ..


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darkcrawler
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Real OC or Post God !
16 Jahre dabei !

Intel Pentium Dual Core
1600 MHz @ 3206 MHz mit 1.316 Volt



Zitat von KS am 15:06 am Sep. 29, 2002
I heard that ABIT m/b could implement the PCI/AGP freq locking. IS that possible in other m/b e.g. ASUS, ECS?




that isnt possible ;)

only a few nforce motherboards can do it

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KS
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OC Newbie
15 Jahre dabei !

AMD Athlon XP
1533 MHz @ 1866 MHz
43°C mit 1.6 Volt


Crazy idea, perhaps.

If I had another clock generator (the same family), I would de-solder PCI, AGP pins of the one on the mainboard and disconnect it. Then I replace those pins with the second clock generator (and other necessary pins e.g. Vdd) and program FS0:3 to fix it at 100/33/33.
Doing this will enable us to overclock the CPU and RAM at any speed without affecting PCI and AGP at all. Do you think so?

An appropriate approach is for m/b manufacturers to incorporate 2 clock generators for this purpose.


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Moderator
16 Jahre dabei !

Intel Core i5
3500 MHz @ 4000 MHz
40°C mit 1.10 Volt


oha dont know if it would work

i have heard about a P4- Mobo mod where someone had changed the Clock generator to get higher Frequencies .. and there are P4 Boards with a locked AGP / PCI..

I think in general it can also be done for AMD MoBos

but i wouldn try to modify a board in that way ..


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HellerSebastian
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OC God
15 Jahre dabei !

Intel Core 2 Quad
2400 MHz @ 3450 MHz
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Is your board a via based board?
if it is not nforce board you could not fix the apg/pci clock


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KS
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OC Newbie
15 Jahre dabei !

AMD Athlon XP
1533 MHz @ 1866 MHz
43°C mit 1.6 Volt


Why don't VIA do it? :(
I heard that Intel m/b could do it.
You mean any m/b based on NForce2 chipset can do it?


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16 Jahre dabei !

Intel Core i5
3500 MHz @ 4000 MHz
40°C mit 1.10 Volt


yep i have heared the same ..

NForce AMD and most P4 Boards have this lock

but no VIA-chipset based or AMD-chipset based boards can do that


Work like you don´t need the money    Love like you´ve never been hurt         Dance like nobody´s watching             Sing like nobody´s listening
But Live as if you will die today

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