Will my graphics card work with an increased fsb?

[Emanef]

I have a mobo with a 100fsb. I intend upgrading to a P3, with a 133fsb, and can increase the bus speed of my mobo to 133mhz. Will my graphics card still work with this? I have a Hercules Dynamite TNT 16mb card. I do not want to have to upgrade this, I just want to make sure it will still work if I increase the fsb.....

Thanks in advance.....

 

[RaPTuRe]

Yes.

DOWN WITH BILL

Athlon 1.4GHz
Gigabyte GA-7ZXR
512MB RAM
GeForce2 MX

 

[njeske]

Does your motherboard support the 133MHz FSB, or are you planning on overclocking the board to 133MHz? If you plan on overclocking, your motherboard will probably have more issues than your graphics card since at both 100MHz and 133MHz, the PCI clock is still 33MHz.

 

[Emanef]

Yes it does support it. It's an Asus P2B, and has jumpers to change to about 16 different setting from 66mhz to 150mhz, so I won't acutally be overclocking. I currently have a P2 running at 100mhz, but will upgrade to about 1gz, for which I need to increase the fsb to 133mhz.

 

[njeske]

Well then you shouldn't have any problems at all. The PCI bus stays at 33MHz regardless, so nothing bad should happen related to your video card when you change your FSB.

 

[Emanef]

OK thanks!

I'd got a bit worried when someone mentioned increasing the fsb would give the AGP a boost, and thought I'd better check it out before shelling out for a new cpu & memory!

 

[njeske]

It will give your AGP a boost to a certain extent since the AGP bus wants to run at 133MHz, but if your current FSB is only 100MHz, that can't happen. So when you boost your FSB to 133MHz, your AGP card can take full advantage of its capabilities.

You still won't have any compatibility issues.

 

[camieabz]

I think you'll find that the AGP card wants to run at 66MHz.

This is the AGP bus speed.


<b><font color=blue>~scribble~</font color=blue></b>

 

[njeske]

Oh. I thought that 66MHz was the speed of AGP2X. I didn't check the specs of his motherboard, I just assumed it had AGP4X where the bus speed (I think) is 133MHz.

 

[Crashman]

Your AGP will be running at 89MHz instead of 66MHz. So the card might complain. You should try it:
if it's stable, that's good;
if it gets hot, add a fan;
if it won't run stable when cooled, get a newer card.
The Geforce 2 series (all versions) and the Radeon series (all versions) are known to accept the additional bus speed.

Back to you Tom...

 

[Crashman]

It's always 66MHz stock. AGP 2x uses twice as many tranfers per clock. AGP4x uses 4x an many transfers per clock. But the clock rate is always 66MHz. Some manufacturers called it 133, but that's like DDR133 which is actually 66. Just like AMD calling their FSB 266 but it isn't so. Or Intel calling thier 100MHz QDR bus 400MHz. Welcome to Marketing Math 101, where no number is as it seems.

Back to you Tom...