I have heard about increasing Vcore volatges when i overclock through FSB. but i cant because my bios restricts me from doing so. What do i do to change my voltages

Sorry, but you can't do it if your BIOS does not allow you to.
btw, if you dont need to increase your Vcore, then dont. Just what have you overcloked the 1800 to? Depending on the core, the clock speed by default would be 1.5GHz.
and what board are you using?

Kailas Shastry

Fried PSU => my 2000+ XP, mobo, mouse and 9600XT are also fied. Damn those light-weight high wattage PSUs!

2000+ @ 1.723 Ghz

Sorry I forgot the board. Its a very old board is a Ga-7vkml

2000+ @ 1.723 Ghz

Thats faster than a stock 2000+

The Athlon 2000+ XP runs at 133 x 12.5 = 1.66 GHz. If you have overcloked your 1800 to beyond a 2000+ on that board, you have to be happy :)

Does your board allow you to lock the PCI and RAM speeds?
Btw, what speed RAM are you using? For the Athlon 1800 / 2000 XP, DDR266 is enough, but not if you are trying an overclock without being able lock the RAM speed (and locking the RAM itself is not a great thing because the Athlon XPs dont like running memory in async mode). So, to overclock, ideally you need a faster RAM, DDR333 or DDR400. Then you need not lock your RAM, and carry on pumping as much FSB as possible without creating a hang up. Ofc, your PCI slots need to be set to their default 33Mhz, or you will have (serious) stability issues, past the 40 MHz mark.

Kailas Shastry

Fried PSU => my 2000+ XP, mobo, mouse and 9600XT are also fied. Damn those light-weight high wattage PSUs!

Ok...

Name: Amd Athlon Xp
Code Name: Thoroughbred
Package: Socket A (462)
Technology:0.13um
Voltage: 1.616

Specification: Amd Athlon Xp 1800+ (1800)
Core Speed:1723.5 Mhz
Multiplier: x11.5
Bus Speed 149 Mhz (If I get Voltages Up It will be 170 Prob)
Rated Fsb:299.7 Mhz
L2 Data:256 Kb

Mobo: Gigabyte Ga-7vkml

Memory: DDR 768 Mb
Frequeny: 150 Mhz
512 Mb Stick: Pc2700 (166 Mhz)
256 Mb Stick: Pc2700 (166 Mhz)

Now thats all my specs righ there.

I mean 2000+ in spefication lol

Ha ok, so your stock speed is 1.53GHz.

With your current 1.72 GHz, you have gotten about 200MHz more, which is about 15% o/c. Not bad at all.

You are lucky with the RAM - at 166MHz (DDR333) they are more than sufficient for your overclocking.

If you can lock your PCI / AGP to default value (33/66) you must be able to push your core speed higher. Does your motherboard have this feature? Thats the all important question!

Kailas Shastry

Fried PSU => my 2000+ XP, mobo, mouse and 9600XT are also fied. Damn those light-weight high wattage PSUs!

If you don't have the ability to lock the PCI/AGP at their default speeds of 33/66MHz, 150MHz FSB is the safe max. VIA based boards are notorious for not have that ability so you've pretty much reached the end of the line. Any higher than 150MHz & the PCI/AGP will go too far outta spec & you'll begin experiencing problems with anything that runs on the PCI bus. You'll run the risk of data corruption on your HDD, if you have a burner you'll produce more & more "coasters", your soundcard (or onboard sound) will begin to "crackle", etc. In other words, you'll be putting all your hardware at risk just for the sake of a few more MHz.

BTW, if you look more closely at your BIOS or read your manaul, you'll find that the CPU voltage IS adjustable.

"CPU voltage overclockable by adding 5%, 10% CPU voltage"

http://www.gigabyte.com.tw/Products/Motherboard/Products_Spec.aspx?ProductID=1660

trust jam to find out more about a motherboard than the owner of the himself

I saw the driver spec page myself, but never had the patience / inclination to look deeper...:D

btw, anyway now Vcore adjustment does not matter if he cannot lock his PCI / AGP.

Kailas Shastry

Fried PSU => my 2000+ XP, mobo, mouse and 9600XT are also fied. Damn those light-weight high wattage PSUs!

Thank you Jam. You have really helped me alot. Thank you. Is there another way to lock pci/agp bus's

"Is there another way to lock pci/agp bus's"

No, if it's not included as a BIOS option, there's no way to lock em down

Well Thank you anyway. Looks like im gonna have to get a new board and processer cause you cant buy socket a boards anymore

Wait.

Are you saying you want to buy a new board, processor and memory only because you cannot overclock your current setup?

Do you need any extra processing power? If not, just stick to what you have. A 1.72 GHz Athlon XP with that 768MB RAM is not slow by any means. Again, depends on what you want to do with it, though.

A friend of mine has an Athlon 2000 running at stock speed which is SLOWER than your overclocked 1800; has 768MB RAM and a 9600XT vid card. He is more than happy with that rig, running Most Wanted and all.

Kailas Shastry

Fried PSU => my 2000+ XP, mobo, mouse and 9600XT are also fied. Damn those light-weight high wattage PSUs!