agp/pci freq.

[amisha]

lets say that in the bios a put this in 72/36 ,what can be harm ?

can it help me in the OC with the CPU and the mem ?

[amisha]

i have a problam that i can go over the 250FSB @ 1:1
i think it comes from the fact that i lock the agp/pci


so it can burn my video card ?
how much do u think is "safe" to me mobo ? ( the mobo did 302FSB in 4:5 ..)

[drcrawn]

Playing around with those frequencies isnt going to help you much, if at all. Once you go above about 74-75mhz on the agp, I guarentee you will lose your hardrive if your motherboard doesnt have bus locks...
My board is without locks, so I run my hardrive off a 33/66 pci card, and have had my frequecies way outta spec with no problems from either my pci based sound card or agp video card. Had my agp up to 79mhz and pci was almost 40mhz, no sound or display corruption.
But before I got the pci card, my os would corrupt at 224 FSB, and I wouldnt be able to boot into windows at all until I reformated everything. Good luck.

[amisha]

i used the 1019 from asus and it is just crap!!! then i returned to the wonderful 1017 .........

i raised the VDDQ to 1.6 and nothing is going up .....
i dont OC from the CG , i clock only from the bios and the other option after the 66\33 is 72\36.......
i can lead to damage ?

[drcrawn]

i used the 1019 from asus and it is just crap!!! then i returned to the wonderful 1017 .........

i raised the VDDQ to 1.6 and nothing is going up .....
i dont OC from the CG , i clock only from the bios and the other option after the 66\33 is 72\36.......
i can lead to damage ?

damage? nah. you never know until you try. The worst that could happen is that you cant boot into windows b/c your OS corrupts. Or you have some display corruption b/c of the video card not liking 72mhz. IMO, you shouldnt worry about either of those though. Give it shot.

[shadowing]

Generally, you should leave it at AGP:66 and PCI:33. You should at least lock the PCI. If the PCI goes above 38, you're kinda screwed... I dunno about the AGP though.

[infinitesadd]

Never, ever raise either one. They can put you at very high risk for HD corruption. PCI/agp lock is there for that reason, OCing these frequencies really doesn't help anything.. My advice is to never mess with it.

[urbanfox]

i would just raise it in 2 mhz at a time.up to 81 and see if that help's..usually it's going to be agp voltage that is going to help with mem mhz..are you at 1.85v on agp voltage if not that is what you should be trying for to get past 250 1.1 ratio. and a new bio's possibly..

That helps you OC? I was always under the superstition that 33/66/1.5v is the best.

[G H Z]

Guys running faster Bus speeds do help your overclock & performance in many cases, and I have never had HD sata , corruption from doing it either.

[jjcom]

Hard drive corrution, possible. I've had my AGP freq up to 73mhz or so on my old board, no issues what so ever. I was using an IDE hd so I can't comment on Sata. It might help on your overclock, but then again it might not. 72mhz on the AGP 36mhz on the PCI shouldn't cause any trouble, but yeah increasing AGP voltage would proubly do more good than increasing your bus speeds

jjcom

[mcnbns]

With my NF7-S I run my AGP frequency at 80MHz 24/7. Helps with benchmarking scores and doesn't hinder stability. So far my HDs are still alive.

[kryptobs2000]

Why does this help your overclock and what does it help? Memory, cpu, what?

[jjcom]

On the Intel board the I865/I875 chipsets I don't believe work above a 300mhz FSB unless you set the buses to something like 40/80, basicly once you start to get near 300mhz you have to allow the busses to run at slightly higher speeds. At least thats what I've been able to gather. could be wrong tho.

jjcom

[kryptobs2000]

So it's only for i865/i875? So it dosn't matter for amd at all then?

[jjcom]

I don't know, I'm just using Intel as an example, I have no idea if it affects AMD. Altho it might...just try it out and see what happens. I guess thats the only way we'll find out

jjcom

[urbanfox]

I always got harddrive corruption in my second rig in sig since no PCI lock, MSI K8T NEO FIS2R

[craig588]

Hipro5 needed to run his AGP bus at like 90MHz with 1.98V to gain stability in the 400MHz+FSB range on his 875. I don't think it affects AMD nearly as much because the NF chipset is designed for overclocking and the 8x5 chipsets are designed to prevent overclocking.

[SADS]

anyone know if the new NF4s have the same sort of sata locks on when over clocking?

if anyone knows can they post which ones are fully locked on all sata sockets or any info they might know..cheers

[shadowing]

The PCI frequency shouldn't go above 38. It would most likely corrupt your hard drive no matter what interface. As for AGP, all I just know is that it can cause severe artifacting, but also boost your scores.

I'd still stick with a 66/33 lock.

[mcnbns]

I think I know why my HD is not corrupted at 80MHz AGP. I heard somewhere a long time ago that the nForce2 chipset locks its PCI bus at 33MHz (no matter the AGP speed) but it allows you to change the AGP speed. That way, even when running AGP speed at higher than normal frequencies hard drives are unnaffected.

My brother has a DFI Infinity nForce2 and he runs his AGP speed at 90MHz without problems.

[[G.N.U.]Fragman]

how about the new boards without agp but pci-e instead??

[MaxxxRacer]

Ice, how does raising the agp voltage help out with overclock, and how does raising the agp frequency help with the OC. When i get my neo2 up and running again, i might try this.

[kryptobs2000]

Raising the agp voltage can help out at high fsb clocks by making it more stable, even with an agp/pci lock. I still don't know, or see why, raising the agp frequency would matter though, and I have no reason to try it out, as my mobo isn't limiting me in any way.

[jjcom]

how about the new boards without agp but pci-e instead??

Then you don't let it past something like 110-115mhz or so from what I can see.

jjcom

[buff]

I ran 80/40 for ever with an 8500 and Maxtor HDD's awhile back.........so it wont always kill things.....