Overclocking w/o a working AGP lock?

[DyslexicHobo]

I have the Asus A8V Deluxe Revision 1 motherboard, and supposedly it doesn't have a working AGP/PCI lock. I know that while the AGP lock is disabled it's risky to raise the FSB because it might damage my video card, does anyone know a way of avoiding any risks while overclocking without an AGP lock?

 

[ts3433]

I think some motherboards have frequency dividers for the buses, but you have to be at certain HTT/FSB frequencies to get them to work.

 

[DyslexicHobo]

Well I searched my BIOS and couldn't find an AGP divider option.

 

[marsluna]

I'm in a similar situation. I can OC my CPU (Athlon XP 2600+ TBred) by upping the multiplier, but any increase in the FSB causes instability. It's not the ram because I have PC3200 ram, which is designed to run on a 200 mhz FSB, and I'm only trying to increase up from the stock 166 mhz FSB. My thoughts are that it must be the increase in the AGP and/or PCI speeds. My MB also doesn't have any sort of AGP ratio or AGP/PCI lock. I read elsewhere about the possibility of using a program such as Powerstrip to lower the AGP speed (to counter the increased FSB), but I haven't tried messing with that yet.

My system:
ASUS A7v8x-x
Athlon XP 2600 TBred (running at 2250 mhz, 166 FSB x 13.5 Multiplier)
Albatron Nvidia Geforce FX 5900 LE

 

[MDE]

It'll work but you won't be able to go very far.

 

[Markfw]

Yea, my AV8 Abit board doesn't seem to have a lock, and I get 220 FSB max...... (from 200 with PC3500 at 333 DDR)

 

[Tarrant64]

I have no lock and I can't get above 222-223. Max, without corrupting my HD's.

the stuff i use is in my sig.

 

[Dr3thepooner]

i overclocked my Athlon 64 3200 , by 200 mhz(10x220) , without touching valtages or latency , temperature is fine and boots and works alright in windows, Memetest doesnt give any errors , but after starting any graphic allpication such as games, benchmarks etc....it locks up and restarts Pc , with giving me an error aboout some graphic driver , can it be because I dont have my AGP/PCI locked?

 

[richardrds]

My Abit AV8 mobo supposedly has a working AGP lock (the manufactuer thinks so, LOL) but it breaksdown when you go above 250-260Mhz clock speed on the LDT. This kept me from OCing my 3000+ winnie above 2.25Ghz, so i turned the 66 lock option off in my bios and selected the 8:2:1 bus divider instead (LDT: AGP: PCI).

This allowed me to push my LDT to 278Mhz (2.5Ghz) which equats to 70Mhz AGP bus (just 4 Mhz above norm) and a 35Mhz PCI bus (just 2 Mhz above norm). If i push the LDT bus any higher with that ratio divider my GPU acts up (6800NU). So I am hoping in the next bios release Abit either fixes the AGP lock so it remains stable at over 260Mhz LDT, or if they added a 9:2:1 divider option that would be nice also.

With a 9:2:1 divider a 300Mhz LDT would allow my 3000+ Winnie to reach its max OC potential at 2.7Ghz (300x9) while setting my AGP and PCI buses at 66Mhz and 33Mhz, (How sweet would that be, LOL )