MSI Big Bang XPower vmods

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08-15-2010, 04:55 AM
Mean Machine

MSI Big Bang XPower vmods

So, I saw that the mods still don't seem to be out in the open, so I thought I'd share (just like I said I would ages ago).

First up is the input power from the 8-pin connectors, which is capped at about 30A by one single choke. Just solder another one in parallel to increase this limit.

http://imup.se/i/lm0uXgOVfh.jpg

Then there's of course OCP, which is at 200A from factory, with a 82.5k resistor. Just change to a resistor with lower resistance, 40k is 400A, which should be enough. Or just short the damn thing to get rid of it altogether. :)

http://imup.se/i/p4zoYDK0CQ.jpg

Another useful thing to mod might be the PWM switching frequency, which is set to 250kHz, although you may benefit from a bit higher frequency under LN2 runs. MSI itself recommends about 600kHz, which is achieved by changing the resistor shown to a 12k one. Just don't use 600kHz for 24/7 use on air, since the VRMs tend to produce quite a lot more heat than at 250kHz. :)

http://imup.se/i/5gTx13cUq1.jpg

So yeah, there you have it. I'd be dishonest if I took any credit for it, but at least you've got the mods right there for any future use. :)
08-15-2010, 05:30 AM
BenchZowner

Sharing is caring, good call Jonas :)
08-15-2010, 06:13 AM
Mean Machine

I was a bit surprised nobody had shared these earlier, so I felt obliged to. :)
08-15-2010, 06:26 AM
Andrea deluxe

msi..... one question....

but made that stupid think in production?

ridicolous......
08-15-2010, 07:08 AM
Raja@ASUS

Some of these mods are not needed on retail boards (OCP is set to 360 amps by default and the input inductors for the EPS 12V line have been uprated). I had to urge MSI heavily during development to make these changes otherwise all retail boards would have been 1.0 and capped to around 180 amps VCC. The switching frequency is the only mod benchers may want to try.

Bear in mind though that MSI are holding back one "modification" at present relating to the high VTT requirement of this board and its apparent issues clocking memory as well as other boards when used with the same CPU and memory modules.
08-15-2010, 07:13 AM
Mean Machine

Quote:

Originally Posted by raju

Some of these mods are not needed on retail boards (OCP is set to 360 amps by default and the input inductors for the EPS 12V line have been uprated). I had to urge MSI heavily during development to make these changes otherwise all retail boards would have been 1.0 and capped to around 180 amps VCC. The switching frequency is the only mod benchers may want to try.

Bear in mind though that MSI are holding back one "modification" at present relating to the high VTT requirement of this board and its apparent issues clocking memory as well as other boards when used with the same CPU and memory modules.

Heh, maybe that's why nobody has shared the mods before. I just assumed we all had retail boards for the EU MOA finals, as they had serial numbers and came in retail boxes. Did all these mods on them.

But hey, thanks for the input and clarification, even though I'm just sharing whatever I get my hands on. :)
08-15-2010, 07:33 AM
Andrea deluxe

msi can't made a board with all of that limits....
08-15-2010, 07:53 AM
EvoCarlos

lol no one shaired them cause they dont do naff all :)
tryed all mods on a rev 1.0 it made it worse

this weekend we took a stock rev 1.0 and got 6.1ghz on a 980x

but as said all xpowers now should be rev 1.1 and have the mods alrady on
08-15-2010, 08:36 AM
giorgioprimo

Quote:

Originally Posted by EvoCarlos

but as said all xpowers now should be rev 1.1 and have the mods alrady on

yes ........
08-15-2010, 09:53 AM
Mean Machine

Well, I was close then, wasn't I? :D
08-22-2010, 05:03 PM
e-Killer

Quote:

Originally Posted by Mean Machine

Then there's of course OCP, which is at 200A from factory, with a 82.5k resistor. Just change to a resistor with lower resistance, 40k is 400A, which should be enough. Or just short the damn thing to get rid of it altogether. :)

are you sure i can do that?
08-22-2010, 08:44 PM
OC_Windforce

Thanks for MOD information :up:
Expect to meet you on September 11th. ;)
08-23-2010, 03:35 AM
ME4ME

Quote:

Originally Posted by e-Killer

are you sure i can do that?

i wouldn't do that. You know, OCP is there for a reason.

Just place a 100K resistor in parallel, that should do just fine :)
(total resistance will be 45.2k)
08-23-2010, 03:54 AM
Mean Machine

Quote:

Originally Posted by e-Killer

are you sure i can do that?

It will work, but that's just an easy fix. The best thing to do is of course just raise the OCP limit instead of bricking the board/CPU if any 700A load would come along. :)

Besides, all the MOA contestants should have the new mod guide by now, I suppose. Funny thing is, they still included the QPI mod, who needs 2.0VQPI? :D

They've included a QPI droop mod as well, but I won't be sharing that till after the competition, as I'm not quite sure if that'd be appreciated by MSI if I did it right away.

OC_Windforce: See you there, I look forward to it!
08-23-2010, 07:05 AM
elmor

Quote:

Originally Posted by ME4ME

i wouldn't do that. You know, OCP is there for a reason.

Just place a 100K resistor in parallel, that should do just fine :)
(total resistance will be 45.2k)

Worked out ok for us and Team Anti-Denmark in MOA EU :D
08-23-2010, 07:55 AM
ME4ME

whaat! :eek: ... thought you'd done the usual mod, and just upp'ed OCP
oh well, nevermind then :p:

guess that says something about how little i actually used this board...:rolleyes:
08-23-2010, 10:44 AM
Mean Machine

Quote:

Originally Posted by ME4ME

guess that says something about how little i actually used this board...:rolleyes:

Or how involved you actually were. :D:D:D
08-23-2010, 11:48 AM
ME4ME

So who did your mods? haha :p::D
08-23-2010, 11:49 AM
e-Killer

yes i have the modding guide too, i will give a try to mod of QPI vdrop. I want to hit 6.7 SPI :)
08-23-2010, 02:58 PM
Mean Machine

Quote:

Originally Posted by ME4ME

So who did your mods? haha :p::D

At least I know which mods were done. ;)
08-23-2010, 05:00 PM
T_M

Hi end boards that still require mods...... hmmm....
08-23-2010, 06:33 PM
G H Z

Well it was already mentioned the newer revision bord doesn't need these mods. Personally I very much like MSI for publishing these mod guides, they are there so overclockers can unleash ever bit of performance possible out of their setups. You don't see that kinda support from other manufacturers, at least not in a comprehensive manner like MSI has done.
08-24-2010, 01:12 AM
Rosty

Nice avatar there 68 kilo's of Mean Machine ;)
08-24-2010, 01:24 AM
BenchZowner

It's more like getting leaked, not being released.
Why won't they release the Afterburner Extreme to the public as well ?
08-24-2010, 03:16 AM
Ccaution

Didn't they?
08-24-2010, 03:27 AM
BenchZowner

Nope.
The Afterburner Extreme is still being distributed by MSI to selected individuals ( extreme overclockers ).
08-24-2010, 03:46 AM
Ccaution

...I have to admit that I was kinda sarcastic, since I have it - and I am far from "selected" :D
08-24-2010, 03:57 AM
Kal-EL

Quote:

Originally Posted by Ccaution

...I have to admit that I was kinda sarcastic, since I have it - and I am far from "selected" :D

Congrats on getting it. Thx be to the select few whom has spread teh wealth :up:
08-24-2010, 04:30 AM
Mean Machine

Quote:

Originally Posted by Rosty

Nice avatar there 68 kilo's of Mean Machine ;)

Don't you dare call me fat! I actually only weigh 65kgs. :D

Besides, I can't really say I'm leaking the mods, as far as I can rembember, there was nothing that stated these mods couldn't be made public. Besides, I'm quite sure MSI would like to see their motherboards used as widely as possible by overclockers, so I'm fairly sure there's no damage done. :)
08-24-2010, 06:32 AM
Oliver

Quote:

Originally Posted by G H Z

Well it was already mentioned the newer revision bord doesn't need these mods. Personally I very much like MSI for publishing these mod guides, they are there so overclockers can unleash ever bit of performance possible out of their setups. You don't see that kinda support from other manufacturers, at least not in a comprehensive manner like MSI has done.

Very wise words :up:
08-24-2010, 07:05 AM
T_M

the new 2.0x have not been released to the wild yet, with OC'ers having to sign an NDA aparently.
Seems pretty lame to me.
08-24-2010, 12:19 PM
Hazzan

with my expereince that mod depent on chip if you board rev 1.0 ...if you chip can run more than 6ghz 3D vantage on other board you need that mod. if your board rev 1.1 I think you dont need that mod
08-24-2010, 03:09 PM
G H Z

Quote:

Originally Posted by T_M

the new 2.0x have not been released to the wild yet, with OC'ers having to sign an NDA aparently.
Seems pretty lame to me.

The new AFB is designed for an as of now unreleased card, and you want it before even the NDA guys get it? :p:
08-25-2010, 11:37 PM
LinusTech

What are the symptoms of triggering OCP on this board?

I'm at 1.45 vcore with a 980X. It's stable at 4.15GHz, but as soon as I set it to 4.3GHz, then run 12 instances of Prime95 small FFT, the CPU multi scales way down.

Definitely not thermal related as temps are fine...

I can't imagine I'm already running into the current limit though. This is on air... Both 8-pin are connected.
08-27-2010, 02:48 AM
T_M

Quote:

Originally Posted by G H Z

The new AFB is designed for an as of now unreleased card, and you want it before even the NDA guys get it? :p:

From what i hear it gets better RAM clocks on the 5870 ;)
08-27-2010, 03:28 AM
Mean Machine

Quote:

Originally Posted by Linus@ncix

What are the symptoms of triggering OCP on this board?

I'm at 1.45 vcore with a 980X. It's stable at 4.15GHz, but as soon as I set it to 4.3GHz, then run 12 instances of Prime95 small FFT, the CPU multi scales way down.

Definitely not thermal related as temps are fine...

I can't imagine I'm already running into the current limit though. This is on air... Both 8-pin are connected.

OCP = Instant black screen, all power to the CPU is cut off. So no, you're not having OCP issues.
09-01-2010, 09:32 PM
e-Killer

anyone tried QPI Vdrop fix?
10-20-2010, 11:54 PM
EXPANDER

done mod photo?
10-23-2010, 07:51 AM
sircuong1303

thanks & sticky