can AGP run at any speed other than 33/66?

[force=1am]

I have a bp6 motherboard with AGP (diamond stealth III xtreme) run at bus speed of 66 right now. Is there anyway i can overclock the bus to 75 and will AGP work at 75MHZ?

[oblivion]

OCing the agp bus is dependant on the FSB,and the AGP divider,futhermore OCing the AGP bus does nothing for the card as far as performance is concerned,but it can drastically shorten video card life.

[GIMOER]

You can try diffrent bus speeds for the AGP bus.Right now my AGP bus is running 83mhz with a Voodoo 3 2000 with no problems.And there is an increase in performance with the higher bus speed.I don't know where oblivion gets his info from.I used the same config on a K62 350/Epox board except the FSB was 83mhz but you still get the same PCI bus 41mhz and the 83mhz AGP.What you need is hardware on the PCI bus that can take 41mhz
that's where the problem maybe.I've had good luck with it but you may not.You won't know till you try.

[oblivion]

And there is an increase in performance with the higher bus speed.I don't know where oblivion gets his info from


I assure you GIMOER,that raising the AGP bus does not really give any sort of performance increase at all worth speaking of.

Maybe you were taking me out of context,I never said that a higher bus speed(front side bus)does not give better performance,but I am contending that raising your AGP speed,say from 66(at 100fsb)to 100(at 100fsb)does nothing in the way of performance,because the AGP already provides more bandwidth then the card can fill......

I think he was asking if he could OC his AGP independantly to attain better video performance.......and that answer would be no,now if he is trying to say that he thinks his CPU will do a 75Mhz fsb,and he needs to know if his AGP card could handle it,he misspoke his desire....and the answer would be a very likely yes,providing he had the right video card(I am not sure how a diamond stealth handles high AGP speeds)and maybe did a little IO tweaking........but the performance increases he would see would directly corrolate with his higher CPU to memory speed,the bottleneck within the MB so to speak.........but the actual raising of the AGP speed will do nothing for his performance,since AGP speed is not even close to being any sort of a bottleneck.

Do you understand........or will you say that I am wrong again?

[alpha]

If it's a socket 370 celeron with a good cooler and thermal paste, you might make 600 with 2.1v or more.

[Brydon]

I got mine at 400@600 right now 2.3v good cooler so try it, mine did it straight out off the box http://www.sysopt.com/forum/smile.gif

[GIMOER]

Error.I'm afraid to say it but you are wrong oblivion.There is a definite increase with a higher AGP bandwith.If you do not believe me check out Tom's Hardware for some AGP tests he ran.These reveal that although the increase is almost non existent with normal graphics,with newer games(High Resolution) and pro graphics it will make the card handle the graphics faster.And with an 83 mhz bus that makes for 668 bandwith as opposed to 533 for normal 2x AGP.

[oblivion]

Please do point me out to the review.....hell I am looking at toms "imapct of AGP speed" review right now......and I see with agpx1 and agpx2 there is a frame difference of 1-4 frames on every chipset....

I will be running some high res q3 benchmarks
in the next hour......with my g400 max at 66agp and my 100 FSB and then at 100agp and 100FSB with agp x 2 on a bx chipset

I did say it would give a small performance difference,but IMO it is not really worth it in most cases,unless you are OCing and you need to raise your AGP to achieve the higher FSB..........

I will post my results here...

[oblivion]

The benchmarks have shown that even now AGP-speed doesn't seem to have a whole lot of an impact on the current crop of 3D-games.

Taken from "Toms hardware guide".

[oblivion]

My relevent system specs
Celeron 366@550
IBM 14.4 7200 HDD
SBlive
Abit BF-6
g400 max
128 megs of infineon pc133 ram

Here are my results in q3 timedemo 1 with everything cranked up to the absolute max

g400 max at 66agp 256agp apeture 366@550
38.5 max 34.9 min

g400 max at 100agp 256agp apeture 366@550
39.1 max 33.9 min

So I got .4 FPS faster on the maximum,and 1 FPS slower one the minimum.........hmmmm
how negligible.

[force=1am]

Yeah,
I dont care about the Stealth performance. All i care is the speed of my celeron. sorry, i might mislead you guy. thank for your help. I talk to a friend and he say the AGP can ONLY go at 33/66 that mean i have to over clock my fsb from 66 to 100 which is impossible for a celeron 400 (400/66 to 600/100). I want the celeron to go up to 450/75 or 500/83, that is y i ask thank.
one last question, how much shortening will the 75Mhz and 83Mhz will it do the life of the 3d card?
thank all

[oblivion]

Hey,you very well might hit 600Mhz with that celeron,I know alot of people with 400's at 600.........give it a try......my 366 does 605 with no problems,you just may be lucky too.....


If your card is cooled properly,there should be a very minimal shortening of life.....lets just say that instead of lasting 6 years you card will last 4(but you never really know,but the shortening will be a small amount in the scope of its life I am sure of that)......having good will help to extend its life.

I have heard of high AGP speeds killing cards before though......but it is rare when
caution is exersised.

[force=1am]

Hey thanks for all the help everybody. Here is my think. I have a BP6 from Abit with Menusoft II(66/75/83/100/112/133). This motherboard support 2 celeron socket 370. To use this dual processor. I must either go with NT4/win2K/Linux. I have 2 celeron 400/66 with standard cooling that come with it. I have poeple comfirm (bp6.com) that windows NT/2k will not load at 600/100. Here is what sharkyextreme.com stated:
multi fsb core percent success
6.0 x 75MHz = 450MHz 100%
6.0 x 83MHz = 498MHz 90%
6.0 x 100MHz = 600MHz 15%
6.0 x 103MHz = 618MHz* 10%
6.0 x 112MHz = 672MHz* .1%*
6.0 x 124MHz = 744MHz* .0001%*
6.0 x 133MHz = 798MHz* .0000001*
My Stealth III cost about $80.00(3 months old). I hate it. If i were to overclock, what fans and heatsink should i get, and it is worth the trouble of a Diamond Stealth III and my CPU getting burn?
thanks for all the reply
force=1am

p.s. my 17GB maxtor harddrive have trouble in windows 2k, it cause my window 2k to freeze all the time. currently run 98SE until get a better harddrive(Western Digital).

[backlash72]

should be no prop running your exelent abitcard and celeron at 75 fsb,used to have an c400 and tnt2 agp that i used at 75fsb,but at 83fsb all my data got lost.
I replaced the 400 with an 300 that now runs at 465 ,did run well for ten minutes in q3 arena this morning after i replaced that **** they puts between the heatsink and cpu with copperpaste.think 75 is your only option with standard cooling if you want stability.

[backlash72]

ehhm that thing with q3 arena was at 504mhz,2.3v and only 37celcius thanks to that fine copperpaste i found in the garage 'n my 4fans.
..just wanted to correct myself.

[backlash72]

thing is i just dosent remember to write things befor i hit submit.
thing is if i run at 66/300 my asus v3800u only gets 128 mpixels/sec in wtune97 but at 100fsb it gets 243 mpixels/sec in the same prog and the agp speed has been 66mhz all he time so higher fsb speed will get it faster but if youre like me 1-force ,afraid of burning your agp card do as me sell the 400 buy a 300 keep the change and run at 465.thats a good deal-

[oblivion]

You can hit the http://www.sysopt.com/forum/edit.gif
button and edit your post to add content.



[This message has been edited by oblivion (edited 03-16-2000).]

[GIMOER]

Somehow I think Tom's tests were just a bit more accurate than your Quake 3 demo.But you do have a point there is little diffrence in running 90% of games on the market now.However this may not be the case in as little as 3 or 4 months when we see the latest batch of new games.And if you did check Tom's tests there is noticable diffrence in Pro 3d graphics which have a much higher triangle count.I will give you that in the case of running a higher AGP bus now it would not make that much of a diffrence in most applications.

[oblivion]

GIOMER,please post a link to the article,I couldnt seem to find what you are talking about,and I truely want to read more about it,especially if it comes from toms,he has his **** together good.

[force=1am]

I was think about that when i buy the celerons but i can not find any celeron that is 366MHz or slower that is overclock able. That's why i when for the 400.
One question thought when you talk about STANDARD cooling, does that mean the fan and cooler that come with retail package of the celeron?

[force=1am]

Here is a stupid question.
the Abit contain 2 IDE and 2 ATA66/33.
I have a EIDE motherboard and 2 ATAPI(zip & cd). Where am i suppose to connect the EIDE and the ATAPI? I currently connected them all to IDE slot. Is this wrong or is this right connection?

[GIMOER]

It's under Tom's Graphics guide the article is called "The Impact of Agp Speed".

[alpha]

And people are listening to Pabst, why?

[backlash72]

with standard cooling i mean fans'n'heatsink,personally i use a standard hs with 4 fans(2 floors).shouldnt matter where u put your drives as long as they can be recognised,mine ata66 is addon so i had to put cdrom on standard ide to be able to boot from cds.

[jad1097]

Here is the link. http://www6.tomshardware.com/mainboard/00q1/000214/index.html