Is there a way to inc. VCore?

[[EXC]DDan]

Is there a way to increase VCore above the max it lets you in BIOS?
has anyone done this, and how?

thnX :)

p.s. and no im not gonna try to fry anything :p
yet...

[The Doors]

Hi [EXC]DDan,
Yes, it's possible using the Cpu pin wiring mod, take a look to this link for more info http://members.prestige.net/newbie_doo/webpage/vcore_adjust.html or http://www.hardocp.com/articles/intel_stuff/bumpvoltage.html and don't esitate to ask more support if you need :)

[[EXC]DDan]

so if i understand right, after you made the mod, lets say you made it so that it runs at 1.75V, that would be your standard VCore, thus making that your minimum voltage?
so for my cellie that would give me a range of 1.75V~2,05V instead of the standard 1.65V~1.95V?

[deez]

yes...that is correct, only your chips default vcore wont change...the board will just think its higher

[[EXC]DDan]

if i read it right, then my cellie (standard VCore=1.65V ) already has 3 out of 4 vid pins (0,1 & 2) connected to the vss pin,
so my only option would be to connect the last vid pin (3) aswell, but that would give me a standard VCore of 2.05V...
I think this is a bit too high :(

[batboy]

I've done this wire wrap trick to two different CPUs (C-566 cB0 and P-III 700 cC0) on two different Abit motherboards that had adjustable voltages. I believe on most motherboards that you can adjust voltage, you still have the option of lowering the voltage. For example, my current 700 CPU has a default of 1.7v and my motherboard allowed user define adjustments of 1.3v to 1.95v. (I think that's what it was, but my memory might be a bit fuzzy on exact numbers) If I wire the CPU to fool the mobo into thinking the default is 1.9v, my mobo is now adjustable up to to 2.1v or whatever. I can still lower the viltage in the BIOS back down to 1.7v if I want to (the real default). If your motherboard does not have adjustable voltage in the BIOS, then Dan is right, if your real default was 1.65v and you wire it to 2.05, then that is too high in my opinion, unless you're super cooling or something. If that is the case, why not buy a better mobo?

[[EXC]DDan]

my asus mobo allowes me to go from 1.65V to 1.95V though I don't think it would allow me to go bellow 2.05V after modding, since the lowest VCore I can set atm is the same as the standard VCore for my cpu (which is 1.65V), your mobo allowes voltages below standard...

and I'm just using aircooling, plenty of extra fans though :)

not going to buy a new mobo either, wasn't planning on spending allot of money on parts until P4 northwood becomes available in combination with DDR :)

[batboy]

I understand, holding off on upgrades until the Northwoods arrive is an excellent plan. On the other hand, you have nothing to lose trying the wire trick. Too bad your CPU has a default of 1.65v, that limits it, but if you set your mobo BIOS to "user define" 1.65v or 1.75v or something like that before you pull the CPU out and do the wire wrap, I'll bet you'll still have the lower voltage settings in the BIOS afterwards. If you don't, then you could always shut down immediately and remove the wire. Seems like I could still go down to 1.3v even after the wire trick with my Abit. Hopefully someone with an Asus mobo that has done this mod will post and tell of their experience.

[[EXC]DDan]

i'll just wait a day or so to see if someone with an asus mobo posts a message...
else ill just try it and see what BIOS tells me, don't think a few seconds of 2.05V is gonna kill it :)

thnX for your help!

[Yodums]

Originally posted by [EXC]DDan
i'll just wait a day or so to see if someone with an asus mobo posts a message...
else ill just try it and see what BIOS tells me, don't think a few seconds of 2.05V is gonna kill it :)

thnX for your help!

LOL everyone is scared to fry their chip when it comes to messing it with it :)

[[EXC]DDan]

thats a good thing right? :D

[batboy]

Yes, it's a very good thing to be cautious. However, I really think if you have your BIOS set at a user define setting before you do the mod, that the BIOS will retain that setting. However, I'm not 100% sure.

[Newbie_Doo]

2.05 is your only option with the wire-wrap. With VERY GOOD cooling, you should be OK, but you are at the limits of that chip's voltage range. Too much voltage causes other problems as well, such as ringback distortion which can cause processing errors.

What other issues are you experiencing? Is it possible that you could have stability issues with the memory? Knowing your memory timings, PCI bus speeds, etc. will help.

Anthony

[[EXC]DDan]

well i guess my cooling should be sufficient, on my cpu i have a golden orb (yes i know you think it sux :p), 1 case fan pullling air in from te front, 1 blowing out in the back, 1 blowing air straight onto the cpu/chipset/mem area, 1 inside for circulation...

for my current system specs: *points down*, think everything you need is down there :), and i tested everything for stability, at these timings, speeds and temps everything is 100% stable :)

[slick306]

I don't know, some people can run their Celerons to 2.0v I wouldn't be to worried about .3 is ually okay. that is only .25. Isn't defualt voltage 1.75? that is what my Celeron2 is?

Slick..

[[EXC]DDan]

well there are 3 different standard voltages for the cellie 2:
1.50V
1.65V and
1.75V
i'm sure mine is 1.65V :)

[The Doors]

Originally posted by [EXC]DDan
well there are 3 different standard voltages for the cellie 2:
1.50V
1.65V and
1.75V
i'm sure mine is 1.65V :)
My Cellie 2 600 cB0 was 1.5v (Oem version), now pin wired for 1.65, and setted into Bios for 1.85v, rock stable @907Mhz, no more :(

[[EXC]DDan]

just replaced thermal compound for some new titan stuff... now my idle temps are below 20C! (my cpu is now running at 12~17C, only running for 30 min idle though)
will play UT in a sec :) lets see how high temps get :p...

damn those pins are small on my cpu lol, now i know why i cant just do it with my thick fingers hehe...

[batboy]

He's right a cB0 Celly 633 has a default voltage of 1.65v. After looking at your signature, I really don't think that increasing voltage is the answer in your situation, Dan. You're already at 1.95v and running that cB0 at 978, that's probably about max and is a great overclock for that chip. I know you probably want to see 1 gig, but sometimes it's not meant to be. In case you decide to do the wire trick after all, I used a magnifying glass and tweeters when I did this procedure. Yep, those pins are small. Glad to see you got a better cooler than that Gorb. Maybe that was holding you back.

[[EXC]DDan]

still have the gorb on top of my lil cellie :p just changed the thermal compound grease thinghy... it helps lol, max temp i (MBM5) have seen so far=38C,
temp will get a bit higher because my mobo is only 24C, it usually gets up to around 26C, so i guess my cpu will heat up another 2~3C

[[EXC]DDan]

yeah 1GHz would be sweet :p

[[EXC]DDan]

btw if i manage to pull this off and the lowest vcore is going to be 2.05V, should i be trying to boot into windows at that voltage or is it just to high at these temps?
and should i disable cpufsb (changes my fsb to 103 as soon as i boot into win98) before i'm gonna try this?

[[EXC]DDan]

well i connected Vss pin with Vid3 which should give me 2.05, but my BIOS still tells me its at 1.65V! (so does MBM5)

tried flashing my BIOS but that doesnt help much...

i double checked to see if the pins were connected properly, so that cant be it...

any thoughts?

btw i used 0.05mm copper wire...

[batboy]

Ok, you're positive VSS and VID3 are wired together? Remember, this does not automatically give you 2.05v. All this does is to send a signal to fool the motherboard into thinking that the default CPU voltage is 2.05v. You still have to set the actual CPU core voltage in the BIOS to your desired voltage setting.

[[EXC]DDan]

yep 100% sure Vss & Vid3 are connected...
but BIOS still gives me a range of 1.65V~1.95V

maybe i should try with a thicker or thinner wire?
i know i have 0.1mm lying around...

is it possible my mobo overrides the 2.05V because it detects its a cu-mine cpu? my mobo manual sais that for all cu-mine cpu's it lets you chose voltages between 1.65V and 1.95V...

[batboy]

Oh guano, maybe you're right and that's all the mobo will allow then. Like I explained earlier, I have no experience with that Asus board. I know the Abit boards allow for more voltage doing this. Well, we tried, sorry it didn't work.

[[EXC]DDan]

was fun to atleast try it :), back to "burn-in" then :rolleyes: :D

[Yodums]

hehehe least you have the burn in option!

[deez]

When I wrapped my CPU I used a single strand from an IDE cable....worked great. Also make sure you did the right pins

[[EXC]DDan]

how thick (in mm) was the ide-cable strand?
cause i think that might be another possible cause that it isn't working here...

and if i understand the datasheet right, then i connected the right pins (Vss & Vid3).

[deez]

I'm not sure what the dimensions of the wire were....just took an old cable i had laying around separated one wire and stripped it

[batboy]

I just used one single wire strand stripped from a short section of 14 gauge automotive wire. It doesn't have to be much. A strand from speaker wire should work too.

[[EXC]DDan]

i just tried it again, rapped the copper wire a few times extra around the pins and guess what!? 2.05V!! :)

it even lets me go upto 2.4V... scary...

thnX for your help guys!

Edit: p.s. now i know y u guys don't like the gorbs anymore... it really cant handle the higher speed and voltage... temps are over 50C with burnp6... no good :(

[deez]

Just be careful with the wire. Over the weekend I started getting strange error messages so I took out my CPU and checked it out and apparently the wire was starting to fray from being pressed right between the CPU and socket. It may have been touching one of the other pins.

Although the good news is that now the CPU seems to be stable at 1.7v Maybe it needed a burn-in at higher voltage.

[[EXC]DDan]

thnx, i'll check it every now and then to see if it's still intact ;)