Massman Posted January 22, 2010 Posted January 22, 2010 Dear All many overclockers were complaining coldbug boot issue during MSI Elite OC Summit. So after summit, our R&D guys work day and night, try to find out a solution. And guess what, we found it! here is official coldbug fix for MSI P55-GD80, Trinergy and Fuzion. Anyone happens to have these boards, please try out and feedback to us! MSI P55-GD80 (back side) MSI Big Bang Trinergy and Fuzion (front side) (http://www.xtremesystems.org/forums/showthread.php?p=4209697#post4209697) SO nice to see MSI pick up on request so fast. I hear they are also working on the vcore issue. Great, awesome, Super-dooper!! Quote
Massman Posted January 22, 2010 Author Posted January 22, 2010 What about that ... coldbug has indeed been lowered. Quote
Massman Posted January 22, 2010 Author Posted January 22, 2010 Coldbug mod confirmed working. Previously: -95°C CBB, -110°C CB Now: -160°C CBB, -175°C CB Hey MSI, this is awesome! Quote
knopflerbruce Posted January 22, 2010 Posted January 22, 2010 I wonder wthat that mod actually does... But cool to see a manufactuerer giving away mods:D 1 Quote
Massman Posted January 22, 2010 Author Posted January 22, 2010 Almost forgot to post this screenie here Quote
r1ch Posted January 22, 2010 Posted January 22, 2010 Just affects Clarkdale or Lynnfield as well? Quote
SoF Posted January 23, 2010 Posted January 23, 2010 really good to see they learned that quickly out of all that feedback - seems that event was great and effective for all :woot: More boards with fullfilling all of our requirements can only mean more fun Quote
Garrett_Wu Posted January 23, 2010 Posted January 23, 2010 I wonder wthat that mod actually does... But cool to see a manufactuerer giving away mods:D After I show this on internet, guess it is not secret anymore. It has nothing to do with temperature sensor of CPU, we guess it's some kind of PCI-E signal become too weak under extreme low temperature, so we have to amplify it. (Doesn't make sense at all, really, but it works.) Quote
Massman Posted January 23, 2010 Author Posted January 23, 2010 Interesting. Can the same technique be applied to X58 boards? Quote
Massman Posted January 24, 2010 Author Posted January 24, 2010 FYI, I quickly tried the Core i5 750 I have here and the problems with cold are still present :-/. Please, feel free to do the same testing and report feedback. Quote
SoF Posted January 24, 2010 Posted January 24, 2010 Interesting. Can the same technique be applied to X58 boards? Not sure but if I can make a guess with my limited knowledge about the technology behind it in deep: As importants parts for PCI-E (lanes) are inside CPU in 1156 and in 1366 not I see low chances for this mod to be working for X58. This is a problem introduced by P55 technology and only appears with that. Maybe I am wrong though And according to my tests with 32nm 1366 until now (and now means -102°C) there are no similar problems with it and cold on today's boards :celebration: Quote
Massman Posted January 25, 2010 Author Posted January 25, 2010 Update coldbug fix for P55-GD85, but we still recommand overclockers to use P55-GD80/Trinergy/Fuzion. ~ http://www.xtremesystems.org/forums/showthread.php?p=4214236#post4214236 Quote
Evocarlos Posted January 25, 2010 Posted January 25, 2010 Update ~ http://www.xtremesystems.org/forums/showthread.php?p=4214236#post4214236 i will have to test this gd85 is here just no serious cold Quote
Massman Posted January 30, 2010 Author Posted January 30, 2010 Okay, I couldn't wait for Hicookie to return from his biz trip, so did some quick reverse engineering. Here's the modification for the GA-H55M-UD2H and the socket pin it's connected to. Normally, the resistance of this pin is ~ 750ohm. Connect to GND means it'll be 0ohm. Just trace back to resistor and remove the resistor and connect both points, or just solder over the resistor. Should actually work on any board ... but I'm not responsible if this turns out incorrect. Anyway, just did the mod and I can boot up at -130°C no problem now. Same 661 as I'm using with the Trinergy. Works for me, but if you're not comfortable trying this out yourself wait for Hicookie's confirmation! Quote
Evocarlos Posted January 30, 2010 Posted January 30, 2010 any idea when a new bios for the gd85 is gona it home ? Quote
Massman Posted January 30, 2010 Author Posted January 30, 2010 That pin seems to be the cause of coldbug on any mainboard, so you can just tape over the CPU pin pad to remove coldbug. No soldering needed. Quote
Massman Posted January 30, 2010 Author Posted January 30, 2010 If I understood MSI correctly, the problem with the Vcore cannot be fixed with a bios update. Hardmods are thus required. Just FB to GND will work fine. Can someone provide me feedback on stability with this modification? I've just tested the Gigabyte board with the same modification and I get the same kind of instability in SPI 1M (230MHz BCLK max). Quote
Evocarlos Posted January 30, 2010 Posted January 30, 2010 If I understood MSI correctly, the problem with the Vcore cannot be fixed with a bios update. Hardmods are thus required. Just FB to GND will work fine. Can someone provide me feedback on stability with this modification? I've just tested the Gigabyte board with the same modification and I get the same kind of instability in SPI 1M (230MHz BCLK max). gd85 vcore mod http://www.benchtec.co.uk/forums/showthread.php?p=71905#post71905 just uploading the vid to utube for the cb mod on the gd 85 Quote
siavash_shojaee Posted January 30, 2010 Posted January 30, 2010 my m.b is ASUS RE2. how can i remove coldbug on this ? and sorry for my bad eng Quote
Massman Posted January 30, 2010 Author Posted January 30, 2010 Strange problem with the modification, though. Before the modification, I was able to run 240BCLK on phase-change SPI32M stable ... after mod (and under extreme cold), I again have problem at 230MHz BCLK ... same as on the Trinergy. Quote
Massman Posted January 30, 2010 Author Posted January 30, 2010 Yeah, same mod for the Trinergy. I was a bit afraid that there would be some OVP, but I can run +0.3V without a problem Quote
Massman Posted January 30, 2010 Author Posted January 30, 2010 my m.b is ASUS RE2. how can i remove coldbug on this ?and sorry for my bad eng That's 1366 ... different problem on 1366 Quote
gradus Posted January 30, 2010 Posted January 30, 2010 Massman try on SS again(or less cold on ln2), maybe its extreme cold decrease bclk?!? Quote
Massman Posted January 30, 2010 Author Posted January 30, 2010 I will try again with UD6. First without coldbug mod, then with coldbug mod. Quote
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