Easiest VDD mod for 8rda+

[Bigjakkstaffa]

Having fiddled about im now sure my mobo is preventing me from going over 180Mhz FSB, now im thinking of doing the VDD mod as ive gotten the CPU quite high but i cant help but feel im starving it for memory bandwith at 175Mhz. The only vdd mod guide ive found involves soldering a resistor to the board, now i get the shakes quite a lot and i really dont wanan be doing anything like that where im liable to blow up everythign and anything. Is there an easy peasy idiot proof way to perform the VDD mod or am i gonna have to live with it, if so what will i need and how can i do it

Cheers all

--Jakk:t

[fishybawb]

I only know one person to have successfully carried this out, and he's a qualified electrician and knows his soldering - practice first, and you'll need one of those "needle point" soldering irons. He used the guide here http://www.8rdafaq.com/Epox_nForce2/index.php with a 680 Ohm resistor. Haven't heard of any easier methods :(

[Rocketmech]

Instead of soldering, try using SMD Grabbers (http://www.rswww.com/cgi-bin/bv/browse/Module.jsp?BV_SessionID=@@@@0764941153.1056921015@ @@@&BV_EngineID=ccchadcijkkmedkcfngcfkmdgkldfhk.0&cacheID=uknetscape&3234373832=3234373832&stockNo=1000348&prmstocknum=1000348&prodoid=246669) for a non-permanent mod.

[Bigjakkstaffa]

Okay, im well confused now, what sort of grabber would i need, you'll have to be simple here, my knowledge of electronics is limited to the parrallel and simple circuit :x

--Jakk:t

[Rocketmech]

Sorry 'bout that, Was tryin to be helpful with a UK link, my bad for not checking it.

SMD grabbers are micro clip on test probes. They can be found @
http://www.rswww.com/
You'll need to use the quick search, :rolleyes: ,look for the POMONA brand.

This link, http://8rda.com/page2_2.htm , will give ya a better idea how to use them for your project. :cool:

I haven't done the mod yet since mine will run 195/195 with Crucial PC2700 on stock cooling. Lucky is what it is!
But there are two views on the resistor type , fixed or adjustable. You might want to ask about the arguements on both.

[Bigjakkstaffa]

Cheers Rocketmech, but i think i'll leave this for now, nice goign with you rboard btw, what Multiplier you running that on?

--Jakk:t

[Rocketmech]

Are you sure you want to see this....:)

XP2100+ AIUHB
10.5 x 195 ( 1995mhz) , 2400+ speed.
Temps 38-42c .
Crucial PC2700 @ 195 , 7-3-3-2.5
Default voltages
Stock cooling on NB/SB, but plenty of case fans.

I don't know why I haven't pushed the cpu any further. I just camped out at 10.5 . I guess that makes me a happy camper. :D

A Lucky B****** is right. No skill was required.

[Someone Stupid]

Well my board's almost dead, though not from the vdd mod.

Generally it's stable now at 333 x 6 (on a 2500 XP :( ), but at stock I can't do anything. :( Since I'm busy with school and my gf is down I can live without the computer working with games (as that will crash it). After I'm into the fall semester I'll RMA it back to newegg or epox since it hasn't been a year and then get a revision two board with the vdd mod built in. I can take the iceburgs off and I saved the crappy heatsink and the glob of a pad they used - so it should be a no brainer. The vdd mod to my board wasn't permanent, so I'm safe, thanks to x51.

What killed it was that I was out of town for a day, and the compressor on the A/C went out and I live in south louisiana. The computer was on when I left, off when I came back, and just started detiorating quickly after I turned it on. I live in New Orleans, so that's around 90 to 100 degrees with high humidty. Not a good enviroment. Hopefully the board last a while longer.

I'm gonna try a reformat and fresh install and see if it can be recovered incase I have some files which aren't being fixed right (as chkdsk found errors, so did Norton). Tried reinstalling drivres, but most for the board won't uninstall completely - even if manually disabling or shutting down everything possible before actually going after the chipsets drivers... just shut off for that time and when you reboot it's back - even if you install a different copy of the chipsets drivers over it at the time. The chipset is frustrating as hell to work with under windows with windows protecting the damned thing. Also won't fully reinstall the drivers from the CD or the latest ones, it's skips a couple parts, even though it's parts I've seen it update before and I had rolled the drivers back to make sure they'd be overwritten. Didn't even notice them.

[Rocketmech]

You had Thermal Protection on or off? You'd be surprised what these electronics can take as far as enviroments. I once found a 386 pc left out in the same climate as you , South Texas , since 1985 . In the rain even. It still looked and ran like new.
But it wasn't left running , of coarse. :eek: :p

[Bigjakkstaffa]

Very nice settings Rocketmech :D

Personally im well chuffed with my CPU MHz overclock, squeezed it up to 2.35Ghz from 2ghz (xp2400), which puts it around the 3100+ mark, memory speed though is a problem, it'll hold relatively stable up to 180Mhz, but its not 100% stable unless its at 174Mhz, and its nto the ram either as it will run under the most agressive timings at 174Mhz, but with really relaxed timings 175 is still unstable :(

--Jakk:t

[Someone Stupid]

Everything is attached with AS epoxy. My chip was running at 2379 mhz with a 432 FSB (2-3-3-6). The CPU heatsink I used AS3, the heatsinks on the mosfets where taken from an old geforce card, cut up and lapped, the north and south brdiges had iceburgs on them. All attached with AS epoxy (yes, correctly). To top it off, it's in the only case I have left other than the one I don't want to fool with. So I have a total of 8 intake fans and 3 blowholes... all fans are high speed, so they have been taken off the 12volt rail to slow them down (and it's relatively quiet actually). So I had excellent airflow, just it was hot and humid and new tehnology doesn't like that. A 386 can do just fine, it doesn't even need a heatsink, practically everything on the nforce boards, if your overclocking wil need heatsinks.

Try system restore, didn't work. chkdsk fixed errors, as did norton, but it's still not working. I'm gonna have to fresh install the whole thing to see if it's the southbridge or not (which it shouldn't be, it has a 120 blowing on it as well as one 80 that can directly blow on it, with a couple other fans pushing air over it - also has an iceburg, so it is the same with the nb.

Hell in a few months if it last, it'll probably be down a good bit more - so I may just buy a new one with the vdd built in - depends on budget, but mostly if I think I screwed it up in installing the sinks - the nb was lapped, but it worked fine with no grit on the board, and it ran that way for several days, then the AC compressor died and I come home to a nearly dead computer. I do see one positive benefit of sticking the nb and sb on the cpu itself now. It will actually have a decent heatsink- though it allows then to lock the fun features to a much greater extent if they want to. So it could be a nasty tradeoff.