does increasing agp bus speed increase performance ?

[rotax]

can one of you guys with 1/2 and 2/3 agp dividers can tell me if its worth something in games or 3d marks ?

[jaida]

i would say that it doesn't increase performance and if so it would not be noticable.

[Ultima]

Hehehe,

sorry to say Jaida, but it sure does show for me.

In my 2nd pc I got a k6-2 450 which, together with a v3 2000 pci, got a score of 1600 in default 3dmark2000 test.

So, I clocked that cpu to 480, which is 120 x 4, and tested again.
I got 1980 as a result, so, I'd say it does make a difference.

Pim

[rotax]

yeah but in that you have a cpu overclock too.
im talking just raising the agp by the divisor.
in my case im running 95mhz agp bus,if i had a ½ agp divisor it would run at 71.5mhz agp speed.
everything else would remain the same, so, would performance drop as well or not ?
i know for sure life expectancy for the vid card would be a lot better,but will performance suffer from it?

[rotax]

pardon me but i have a BE6-2....2/3 AGP OR 1/1 AND I HAVE A 1/4 PCI dividor...sorry but you are wrong on this one.
but thanx anyway,you can mail me if you want.


[This message has been edited by rotax (edited 09-24-2000).]

[Barney]

You are right,I checked it and I was wrong.Very strange mobo,that it hasn't got a 1/2 divider.Since a high AGP does not improve your performance,I have a link to the Abit site,where you can download a new bios.It might solve the problem.They talk about 'Improves the 133 Mhz option in SoftMenu' and 'For users who try to overclock the FSB up to 133 Mhz, but fail when using some AGP video cards which can't run at that frequency in 2X mode'.Those new bioses might have a 1/2 agp divider.

http://www.abit.nl/english/download/bios%20update/bios-be6r2.htm#01

Ronald

[rotax]

thank you for the link and the tip.
its apreciated.
ill put an eye on it.

[jaida]

sorry ultima but i guess you didn't get what i meant, i meant that increasing the agp bus wouldn't make a performance difference. Increasing fsb would of course increase performance as it did in your case

[This message has been edited by jaida (edited 09-24-2000).]

[neo_otyugh]

i accidently ran a tnt2ultra at 100 agp bus for a while...all i can say is that half life counter strike was blazing fast for about 6 hours til it finally froze. my fps almost doubled in the game, but it would crash immediately when running 3dmark2000. previous i ahd been getting 30-40 fps in half life, and suddenly was gettin 80 fps, dropping to the 2/3 diver seemed to decrease by about 10fps, but it was still fast enough for me.
i would not recommend doing this unless you have video cards to burn...my card was too hot to touch when it finally crashed the system....i have no tried again since it survived that event.

[Barney]

I must guess you have a 133mhz mainboard (since your processor runs at 143mhz FSB,which is impossible with a 100mhz FSB board).All 133mhz boards have 1/2 AGP dividers.The normal AGP speed is 66mhz,so with 133mhz processor FSB you MUST have an 1/2 divider.So your videocard runs at 71.5mhz.There are only few cards that can manage 89mhz FSB on AGP (cards don't have to go that high anymore,this was when people wanted to use 133mhz FSB for their processor,but there weren't 133mhz boards what means no 1/2 divider).
95 mhz AGP is IMPOSSIBLE .There is no card that can manage that.If a diognostic program tells you this,it's lying,it must think you have a 2/3 divider,while you have a 1/2.If it isn't lying you must have a supercomputer.

1)You are overclocking your board (if what you say is true it must be a 100 board) from 100-143mhz (43mhz);
2)You are overclocking your videocard from 66-95mhz (29mhz);
3)If you have no 1/2 AGP divider,you don't have a 1/4 PCI divider,so your PCI is overclocked from 33-47.5mhz (14.5mhz)

You see this all is imossible so you must have made a mistake.(I am just trying to explain something to you to make you understand,and I don't mean to say that you are stupid or something).

To answer your question:as far as I know (from my and others experience) a higher AGP FSB does not increase (directly) your videocard's performance.It's like this:When you raise your processors FSB,you raise your AGP's FSB too.Raising your processors FSB will raise your memory's bandwith and your processors speed (in mhz) when you leave the system clock as it was (with Celeron,PII and PIII it is clock locked,so when you increase the FSB) you will also increase the processors mhz.When your processor is faster,your videocard will perform better,so it performs better indirectly.

Ronald