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GA-7VAXP ... 2 problems

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  • Motherboards
  • Windows XP
Last response: in Motherboards
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October 29, 2002 5:41:27 PM

I just upgraded my system to an XP 2100+, the GA-7VAXP, GeForce4 ti4200/64mb, and Crucial PC2700 CAS2 512MB (DDR333) ram. The upgrade went fairly smoothly. Windows XP recognized everything amazingly enough. I was online and downloading up-to-date drivers in no time. (My old system was an Abit KT7A-RAID, tbird 1.4GHz, GF2MX/32MB graphics, and PC133/CL2 512MB ram.)

I'm very pleased so far with the mobo, however I do have two problems I can't seem to figure out:

First, there is a DIP switch for the system bus speed, called SW1. With this switch you can set the system bus speed to either 100, 133, or 166 MHz. Initially I had to boot with it set to 100MHz, as it would not POST at either 133 or 166. Then I switched the BIOS setting for the DRAM clock to "166-DDR333," and was then able to boot with the DIP switch SW1 set to the 133 setting, but not to the 166 setting. I can't seem to figure out what I'm doing wrong, if anything. My memory, I think, should be capable of running at DDR333 rates. It is Crucial "XMS" DDR RAM, model # CMX512-2700C2. Maybe I've misunderstood the purpose of this SW1 switch... what's the 166 setting for, if not to run at DDR333 rates?

Second: There doesn't seem to be an 8X AGP setting in the BIOS for the graphics card. The only options right now are 4X and 2X. Is that because my graphics card is only 4X capable, so the BIOS doesn't even display the 8X option? Not a big deal on this one, just curious.

I'd really appreciate some help on the first issue, though. Thanks!

-Kieran

More about : 7vaxp problems

October 29, 2002 8:57:15 PM

Yeah, your card only does 4x. 8x will come up if you had one.

The FSB switch is piss-poorly labeled, so you should just recognize it for what it is, and use a black marker to completely destroy any reference made to it in the manual.

SW1 is a divisor switch.

It has the *added* fscking bonus of locking you out to a set range of FSB's, as well.

You will HAVE to unlock that XP to mess around with SW1. You should have it set to "133", which actually just gives you a 4 divisor on the FSB.


"I personally think filesystems should be rewritten from scratch every 5 years..." --- Hans Reiser
October 29, 2002 10:26:44 PM

Hey, thanks ej.

Can you explain to me what a divisor is for the cpu clock? This is new to me... I'm used to setting a front side bus speed, then the cpu speed would be the clock multiplier times the fsb speed. What's this divisor thing? You said that at 133, I'm getting a divisor of 4... what does that mean? Also, any good websites detailing how to unlock XP processors? I'm sure I could find a dozen or more with a quick google search, but if you know of any GOOD ones off hand that'd be cool.

-Kieran
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November 3, 2002 2:14:56 AM

the divider is the ratio of the front side bus to the pci bus. basically, when you run a 133 fsb your divider is 4:1. when you increase the fsb ( in the bio sto between 133 and 165 ) so will you automatically increase the pci bus ( you get no benefits from this only electromagnetic interference ). however, when you set the fsb to 166 with the jumpers, a 5:1 divider automatically kicks in to return the 33mhz pci bus
November 3, 2002 3:14:34 PM

"so will you automatically increase the pci bus ( you get no benefits from this only electromagnetic interference "

Negative, Ghostrider.

You'll be able to tell a difference when you overlock your pci bus. If you overclock too far, it won't work.

But 2 and 3mhz (and 4 or 5, if your components can handle it) will give you a faster response time. Won't really boost your "throughput", but programs and your NIC will respond faster to your mouse click.

The NIC's are usually the most finicky components. Most can handle 35mhz-37mhz, but a whole bunch won't respond or will be sporatic above 37mhz.



The PCI bus "standard" is 33.3mhz. So whether you have a 200mhz frontside bus, or a 100mhz frontside bus, you want that PCI bus to be running 33.3mhz.

100/3 == 33.3
133/4 == 33.3
166/5 == 33.3
200/6 == 33.3

"I personally think filesystems should be rewritten from scratch every 5 years..." --- Hans Reiser
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