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things i need toknow about the bios


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#1 starcraftmaster

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Posted 01 June 2009 - 06:36 AM

hey guys i just got a few questions that i didit under stand
i googled them but i did not understan what they ment
so hopefully you guys will know and what should i set them so my computer goes as fast as it can

fast programmed I/O modes ( set 4 in bios)
block mode (set ON)
write precompensation (set 0)


i aslo found 32 bit transfer mode
it was off and i know it can make the computer faster but only if the mb and hard drive supports it
so i turned it on and the computer is working fine so is it safe to leave it yer?

Edited by starcraftmaster, 01 June 2009 - 06:40 AM.


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#2 Platypus

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Posted 01 June 2009 - 07:40 AM

Most of those can usually be left at default or disregarded.

PIO mode options are irrelevant to a correctly functioning modern drive. It was necessary in some circumstances to limit use of faster PIO modes if a drive did not implement all the fast PIO modes.

Block Mode would normally be set to ON, this may be the BIOS default.

Write Precomp applies to only the most ancient drives, and can be ignored, the drives ignore it.

If 32 bit transfer mode causes no problems it should be on - it's another setting made available to solve a possible compatibility problem.

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#3 starcraftmaster

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Posted 01 June 2009 - 08:39 AM

so i should set fast programmed I/O modes to 5 to make the computer faster (5 is the highest) but some drives may have probloms so i can try it and if it makes probloms i just put it back to 4 ?

#4 garmanma

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Posted 01 June 2009 - 10:10 AM

Worth reading
http://burks.brighton.ac.uk/burks/pcinfo/h..._sg/bios_sg.htm
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#5 Platypus

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Posted 02 June 2009 - 06:32 AM

so i should set fast programmed I/O modes to 5 to make the computer faster

No, if the system is working correctly, programmed I/O is not being used, so the setting will have no effect at all. PIO is now only used as a fall-back if DMA mode cannot be sustained for some reason (commonly excessive read errors). The option to limit the PIO mode was needed for some older drives that did not have all the PIO modes. If the drive dropped back to PIO and BIOS allowed the controller to use a mode faster than the drive could support, the system would probably crash.

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