"Erik" said:
I just got this A8V mobo and a 3500+ socket 939 cpu.
When I check the bios "Frequency/Voltage", and I set "AI overclocking" to
manual,
I only see these four choices:
CPU FSB frequency.
DDR voltage.
AGP voltage.
V-Link voltage.
According to the manual, I should also see these options, but they just dont
show:
CPU voltage.
CPU speed.
AGP/PCI lock.
I just flashed the newest bios (1006), but these options still dont show.
What am I doing wrong?
The manual says set "CPU Speed/Voltage Settings" to [Manual], to
make the other two CPU settings show up.
As for the AGP/PCI lock, the implication is the frequency stays at
66/33 MHz, and is not user adjustable. To know whether this is a
permanent condition, would require finding a datasheet for the
clock gen. I believe on the K8T800 non-pro, the AGP frequency was
divided down from the HyperTransport link speed. And, we're assured
that reviewers have checked the lock on the K8T800 Pro and it is
there. So, this just means you cannot overclock the AGP 8X bus from
66 to 75MHz, the practical limit for high end video cards now.
HTH,
Paul
That is what I get for listing to posters in this group.
This article claims the lock isn't working on A8V, and that is
why evidence of said lock is missing from the BIOS.
http://www.hothardware.com/viewarticle.cfm?page=3&articleid=534&cid=3
"Please note, that the VIA K8T800 Pro chipset is supposed to feature
an AGP/PCI lock, but it isn't functioning properly at the present
time. We've tested two different K8T800 Pro based motherboards from
two different vendors so far, and neither has had a working AGP/PCI
lock. Asus' specifications don't list the AGP/PCI lock as a feature,
and their current BIOS doesn't even list the option, so we won't ding
Asus too badly. If a tech savvy user buys an A8V based on VIA's
documented specs of the K8T800 Pro alone, they'll be disappointed by
the lack of an AGP/PCI lock, but if a user buys the board based on
Asus' advertised specs, they'll get what they paid for. Hardcore
overclockers will probably want to wait for future revisions of the
A8V and/or K8T800 Pro to see if this issue can be resolved, however.
Pushing the FSB too far without an AGP/PCI lock can cause instability
with some devices. This didn't hurt sales of the original K8T800, but
NVIDIA has had this feature with the nForce3 for some time."
If this is true, what you should find is problems when the FSB hits
an overclock of about 228MHz versus nominal 200Mhz. Try lowering
the multiplier, then work on the FSB and see where it craps out.
There is a comment from Wesley Fink at Anandtech here:
http://www.anandtech.com/news/shownews.html?i=22361
This is what the option looked like on a review board. Guess
that makes this a distinct "maybe"
Options would be Auto,
66MHz or 75MHz.
http://www.amdzone.com/pics/motherboards/asus/a8v deluxe/agppcilock.jpg
Paul
