[tschroeder250]

I got a new proc and I am trying to tweak the BIOS settings to maximize its speed. I have been pretty successful, but I have a question that might seem pretty basic.

Often when I bump up the multiplier or increment the CPU speed, upon reboot I get no video. It seems like the computer is still running behind the scenes, but I am not 100% sure.

My question is this ... if it is true that the modified settings have made the video go haywire, what settings are the likely culprits? Perhaps I can turn down another setting to allow the proc to freely roam at higher levels.

I will followup with specific system details if needed (the specs listed in my signature are close, but slightly out of date).

Thanks in advance!

-Todd

[Gnufsh]

If you bump just the multi, it shouldn't just kill the video. What you are probably seeing is a computer that will power on, but not finish posting. A definate sign that your are pushing tha hardware a little too far. Try a little less speed or a little more voltage.

[Freezermug]

It can also be an indication that you are running your agp/pci out of spec. When you oc the system certain parts will run out of spec if it isnt locked. The video is one of them. Make sure the agp / pci is locked or at a fixed setting of 66.6/33.3.

Best regards-

[Gnufsh]

Right, but, if, as he said, he just raised the multiplier, it wouldn't have changed the AGP/PCI freqs. Is it the system in your sig?

[tschroeder250]

Thanks for your collective help so far!

The specs in my sig are correct, except for the proc. The new proc is an XP 2600+, but it is the 333 MHz FSB version, and not the 266 that I wanted (and that is supported officially by my MB). The proc is not unlocked as this point. My multiplier is set at default currently, but I believe it is at the highest allowed anyway (allowed values are 6.5x - 12.5x).

I don't think my MB supports locking the PCI and AGP bus speeds, but I will look closer. I have the Phoenix - AwardBIOS. I have always assumed that the CPU frequency alters the PCI bus, is that correct? I have included the settings that I have below if you have suggestions, they are all currently set to default values.

Thanks again!

AGP & P2P Bridge Control
- AGP Aperature Size = 64M
- AGP Mode = 4X
- AGP Driving Control = Auto
- AGP Driving Value = DA (default due to Auto setting above)
- AGP Master 1 WS Write = Disabled
- AGP Master 1 WS Read = Disabled

CPU & PCI Bus Control
- PCI1 Master 0 WS Write = Enabled
- PCI2 Master 0 WS Write = Enabled
- PCI1 Post Write = Enabled
- PCI2 Post Write = Enabled
- PCI Delay Transaction = Disabled

System BIOS Cacheable = Disabled
Video RAM Cacheable = Disabled
Auto Detect DIMM/PCI Clk = Disabled
Spread Spectrum = Disabled