fsb and graphics card.

Ok having 512mb ddr 2100 and tnt. Don't laught about my vid card. And yes it is TNT not even TNT2. Guys I'am on the way to buid up my new pc from the ground and after I bought mobo, cpu, ram and some other stuff my pockets just went empty. So no laught here.

But, but back to the topic. I turned my fsb to 140, works w/o any problem. Rised to 145 again no problem. But as I try to go over 145 the system starts booting. Monitor makes a beep, so yu are can be sure that there is video signal coming and then it turns off. I mean just before the bios installation the vid card is not giving out any more signal.
So no is my question. May it be that as agp fsb is faser than my old TNT can handle then it just goes crazy or whatever.

Mmm and the mobo is Gigabyte ga-7dxr

Hard to say. Only way to find out for sure would be try a different video card.

but by the way, what is critical agp fsb???

It really varies but the vidoe card makes the difference.
Newer cards have no problems at 90mhz agp some over 100mhz is ok.

Wow, must get new vid card.
Mmmm, but am I wrong saying that standard for agp is 66mhz.
And new cards can run even with 90

Yes 66mhz is the standard ,1/2 of 133fsb or 2/3 of 100fsb.