How do you know if you are actually using AGP x1 or AGP x2??

[Whisper]

On a Matrox G-200, how do you know exactly what AGP mode you are running in?

I know there are settings in the registry that allow you to set the AGP mode, but that does not neccessarily mean that your Video Card is in fact running in that AGP mode you have set.

How do you know for sure??

[Grego]

You can use the program pcilist which you can download from murc.

[Pertti]

Or SiSoft Sandra, which gives you a lot of usefull information about your hardware.

Pertti

[Whisper]

Thanks Grego, PCIList is exactly what I was looking for.

Now I have to troll the forums for forcing AGP x2, dang nabit.

Cheers

[This message has been edited by Whisper (edited 09-09-1999).]

[Guyver]

Whisper,

Go to the downloads section and pick up the registry hacks that ANT has accumulated. The force AGP 2X, 1X, Auto(default) are all in there.

Guyv - Who actually got better performance after de-tuning AGP2X to AGP1X with his 89Mhz AGP Bus!

[Whisper]

Yes I got that file Guv, thanks

Hmmm, it is a wonder as well.

If I force AGPx2, I can't run AGPCLK/CPUCLK at 1/1, I have to go back to 2/3's.

If I have it at set at AGPx1, my computer happily runs AGPCLK/CPUCLK at 1/1.

I wonder which is faster, and in what instances?

System specs I guess
Abit BH6 V1.02
Intel Celeron 366 O/C to 550 (5.5*100)
Matrox Millenium G-200 SGRAM Model
64MB of SDRAM

Comments?

[Maggi]

Hi Whisper,

AGP1x at 100MHz FSB with an 1/1 divider could be called AGP1.5x ...

Reason is that AGP is designed for 66.6MHz AGP bus speed, using AGP2x uses 2x66.6MHz for transfers (133.3MHz) ...

Using AGP2x on an AGP speed of 100MHz (1/1) would lead into 200MHz AGP transfer and that's way beyond spec, whereas AGP1x at 100MHz AGP speed is below regular AGP2x hence you can reach it on your system ...

I hope this clears it up a bit.

And probably you could do some benchmark comparisons to see the difference (for example the texture rendering tests from 3DMark)

------------------
Cheerio,
Maggi
________________________
Asus P2B-DS @ 103MHz FSB
2x P3-450 @ 464MHz
512MB CAS2 SDRAM
Millenium G400 32MB DH

[Rags]

The Matrox AGP cards have always seemed to be forgiving for high bus speeds.

Rags



------------------
P3 450@560, BH6, 128MB PC100, Delta CD ROM, Mill.G200/G400, 8.4G WD, 8.4G seagate, SB16 (temp.), Yamaha Burner, Zip, Sportster 56K int., Storm Scanner.

[Whisper]

Thanks Maggi

I thought as much, but you can never be 100% sure, unless you ask somebody who really knows!

Funnily enough, at 1/1 AGPCLK/CPUCLK with AGP2x forced, it even made it in as far as the Windows Start sound.

Then froze

Oh well.

[This message has been edited by Whisper (edited 09-10-1999).]

[Maggi]

LOL Whisper ... so fast, it's kinda ridiculous

What does that remind me of ?

------------------
Cheerio,
Maggi
________________________
Asus P2B-DS @ 103MHz FSB
2x P3-450 @ 464MHz
512MB CAS2 SDRAM
Millenium G400 32MB DH

[This message has been edited by Maggi (edited 09-10-1999).]

[Whisper]

whisper@hardocp.com perhaps?