KT7A Bios question.

[LIVAN]

I have a KT7A and just wondering about a couple points. In the Bios, the setting is CPU FSB/PCI bus and bwlow it is the +CPU FSB option whereby FSB speed can be increades one by one. My question is say I have the setting set at 133/33 and if I add +10FSB with the next option, I will obviously have 143FSB but my qestion is what about the PCI bus? Is that held at 33? or it goes to 145/4?

Second part is the AGP bus. Is it held at 66 always? or does it 2x the PCI as usual?

 

[Joemonkey]

the number under the FSB settings is only for the bus going to the CPU

 

[limsandy]

The PCI is held at 143 divided by 4 and the AGP is 143 divided by 2.

 

[LIVAN]

Ok now so which is it?

 

[LIVAN]

Anyone?

Just to clarify, I am saying if you use the 133/33 as the "stock" setting and then add 10 FSB using the "Add to" option. Is teh PCI stay at 33 or does it go 143/4= 36??? Please advise.

 

[chasm22]

Quote from Paul's Unofficial Abit KT7 Motherboard FAQ ; "Note that the "CPU FSB Plus (MHz)" option does affect the the PCI and AGP bus speeds as they operate at fixed multiples of the FSB speed. The manual says that this setting allows you to "independently increase the CPU FSB speed" - this is incorrect and confirmed by private email with ABIT."

 

[twong82]

When you use the fsb+ option everything is affected including the pci and agp. So in your case, the pci changes to 36mhz.

 

[LIVAN]

Ok Thanks, I think I found my AGP instability problem then. All this time I been doing 133/33 + 12FSB to get 145 fsb. So I been doing 36PCI and 72 AGP..Yikes...


AGP is Pci x2 right? no?

 

[LIVAN]

I just used my Sandra 2001 and what I saw frankly is scaring me. I have my Bios set at 145fsb/24 PCI and 0 right now on the +CPU FSB option. But Sandra is showing my AGP is operating at 96mhz! and my PCI at 48 MHZ. Is this right?!?!??!

 

[Whizzy]

No.. Sandra2001 has no support for the KTA chipset. it really is 24Mhz PCI and 48Mhz AGP in your case.

 

[LIVAN]

Ok got it.

Waht are some of teh symptoms of AGP us not having enough juice? In the form of I/O voltage? My setup can crunch numbers all day with RC5 and run all stability tess but I sometime get weird screen freezes while the system is idling. Could that mean my AGP doesn't have enough juice? Or too much? I have mine set at 3.6 now.

 

[zzzz]

You might want to set the AGP driving value manually in bios. What video card are you using? For Geforce 2 cards EA or DA is a good seting..