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http://www.falconfly.de/cgi-bin/yabb2/YaBB.pl This & That >> This & That >> /BIOS settings questions/ http://www.falconfly.de/cgi-bin/yabb2/YaBB.pl?num=1114010996 Message started by LuxKiller65 on 20.04.05 at 17:29:56

Title: /BIOS settings questions/
Post by LuxKiller65 on 20.04.05 at 17:29:56

I have some questions about settings in the BIOS.

/1/ What is the PCI Bus Mastering? It is set on disabled by default.

/2/ What is the PCI VGA Palette Snooping? Is also disabled by default.

Should I enable them two?

/3/ What is AGP Aperture Size? Got it with my BIOS update, before there wasn't such option. Guess it's 64 MB by default. Dangerous if I put an higher value?

Thanks and good evening!

Title: Re: /BIOS settings questions/
Post by paulpsomiadis on 20.04.05 at 18:07:53

PCI Bus mastering definition: -

http://www.pcguide.com/ref/mbsys/buses/types/pciIDEBM-c.html

RECOMMENDED = ENABLE

(providing you have a mainboard and hdd / cd / dvd drives that are Ultra-ATA capable. i.e. ATA33/66/100/133)

VGA Palette Snoop definition: -

http://www.pcguide.com/ref/mbsys/bios/set/pciSnoop-c.html

RECOMMENDED = DISABLE

AGP Aperture size definition: -

http://www.ocfaq.com/article.php/overclocking/vidcard/43

RECOMMENDED = HALF of your total RAM

Title: Re: /BIOS settings questions/
Post by Chosen_One on 20.04.05 at 20:48:32

AGP Aperture size...

if you use a radeon and you get an instable machine maybe setting this value down to 32mb can fix it....
64mb, 128mb....no difference in speed....no matter whats your value....

Title: Re: /BIOS settings questions/
Post by LuxKiller65 on 20.04.05 at 21:49:31

Actually, it's about the ATI on the motherboard, which is disabled, so it doens't make much difference.

But for the BUS Mastering, I think I have UDMA (Ultra DMA) and Enhanced DMA. So setting it on will be ok right?

Title: Re: /BIOS settings questions/
Post by gamma742 on 21.04.05 at 07:21:22

Not sure if I can link to this one... http://www.rojakpot.com/default.aspx?location=7&var1=18 This was very helpful to me.

Scroll down and look for the

[/size]FREE Access To The BIOS Optimization Guide[size=13]

Title: Re: /BIOS settings questions/
Post by LuxKiller65 on 21.04.05 at 15:20:12

Hum well thanks...

:P

Compaq BIOSs are very limited and that's a shame, but apart from that I really think they are pretty good.

Title: Re: /BIOS settings questions/
Post by voodoo5500 on 21.04.05 at 19:40:35

If you are using a voodoo for the video card, set the AGP Aperture as low as possible (4 MB).

Good link for motherboard bios settings with voodoo video cards:

http://www.xs4all.nl/~jfeelder/voodoousers/performancebios.html

Title: Re: /BIOS settings questions/
Post by gdonovan on 21.04.05 at 23:03:15

wrote on 21.04.05 at 19:40:35:

If you are using a voodoo for the video card, set the AGP Aperture as low as possible (4 MB).

I always have mine set to 64MB with no problems.

Title: Re: /BIOS settings questions/
Post by LuxKiller65 on 22.04.05 at 06:57:03

It can't be that of my Voodoo, since it's a PCI one. It's that of the integrated ATI chip.

If I always have my PC detecting a new CPU and setting the time back to 00:00, is the problem coming from the battery (the one on the mobo, often from Sony)?

Title: Re: /BIOS settings questions/
Post by paulpsomiadis on 22.04.05 at 21:33:42

Yup, dead battery - just pop out the old one and go buy a replacement to pop back in afterward! ;)

Title: Re: /BIOS settings questions/
Post by LuxKiller65 on 23.04.05 at 10:02:21

Did it yesterday. Now all seems back to normal.
Actually, on my QDI jumperless motherboard, I can set the CPU speed directly from the BIOS menu!

:P

Weird!

Title: Re: /BIOS settings questions/
Post by paulpsomiadis on 23.04.05 at 23:27:14

Nah, pretty normal - I've had lots of jumperless mainboards that have CPU settings in the BIOS. ;D

Title: Re: /BIOS settings questions/
Post by LuxKiller65 on 24.04.05 at 08:21:32

Yes, but I have a Pentium I MMX @ 233MHz and it was running @ 100MHz until yesterday!

:P

Title: Re: /BIOS settings questions/
Post by paulpsomiadis on 24.04.05 at 21:15:58

Jumperless Pentium boards will default to 100MHz by default as a safety feature - so, if like yours, the CMOS battery fails...the system will still boot! ;D

Title: Re: /BIOS settings questions/
Post by LuxKiller65 on 24.04.05 at 22:04:05

Well, it's not only a Pentium board actually. It showed the message "CMOS Cheksum error" or something like that, and then went back to the default setting and kept on finding a mysterious new CPU... but Windows worked fine...

PCs... what a mystery

;D