ASRock 939Dual-SATA2 VCore & VDIMM Mod

[c3l5o]

For those people running 2-2-2-5 timing on this board, I think you will find that 2-2-2-10 will give better memory bandwith and higher scores.

What BIOS and drivers do you use on your asrock?
BTW just bought another one... eh

 

[Wam7]

The best bios I have come acoss is 04xx
http://www.pc-treiber.net/download-file-255.html

Doesn't have the 274 HTT limit and a lot of guys are finding it much more stable than the OCWbeta2.

 

[c3l5o]

The best bios I have come acoss is 04xx
http://www.pc-treiber.net/download-file-255.html

Doesn't have the 274 HTT limit and a lot of guys are finding it much more stable than the OCWbeta2.

Thanks I'm havin' some problems even in default... When I see a flash movie as soon as I open the USB miniport driver crashes... something wierd...

 

[Wam7]

No problem, let us know how you get on.

 

[c3l5o]

The problem continues...
You can see the error if you click the picture:

 

[Wam7]

What memory timings are you running?

 

[c3l5o]

Tried them all, since the SPD 3-4-4-8 until the 2-2-2-5 lol
I asked your Timmings so I could try them...
The Ram gives 283Mhz 3-4-4-8 @ 2.8v thats for sure... so why don't do they give 200Mhz @ High setting?

EDIT: Tried also 1T-2T, no difference between the settings

 

[Wam7]

Try this if you're not running it already.
http://www.pc-treiber.net/download-file-641.html

 

[c3l5o]

Try this if you're not running it already.
http://www.pc-treiber.net/download-file-641.html

Presently, I'm not using it, but when I used it the problem happened also

 

[krusha03]

Hi! I am new to this forum and I would like to thank you for the great articles. I made the 3.2V mod, accidentally shorted it and made a hole in the element 4500M right below . My questions are: does anybody know what that element is, what is its purpose, what is its maker and where, if I can find a replacement. Also would it work if I directly solder the 3.3V wire from the PSU or not?

 

[krusha03]

Anyone? W1zzard?

 

[persivore]

Hi! I am new to this forum and I would like to thank you for the great articles. I made the 3.2V mod, accidentally shorted it and made a hole in the element 4500M right below . My questions are: does anybody know what that element is, what is its purpose, what is its maker and where, if I can find a replacement. Also would it work if I directly solder the 3.3V wire from the PSU or not?

Its a dual MOSFET which switches the voltage supply for the RAM when there is no power applied to the board. When the power is off, it switches the RAM power supply to the 5v standby line, instead of the 3.3v line.

The board will work fine if you remove the chip and solder the 3.3v line to the large solder pad next to the Vdimm MOSFET.

 

[krusha03]

Its a dual MOSFET which switches the voltage supply for the RAM when there is no power applied to the board. When the power is off, it switches the RAM power supply to the 5v standby line, instead of the 3.3v line.

The board will work fine if you remove the chip and solder the 3.3v line to the large solder pad next to the Vdimm MOSFET.

Are you sure that this part is MOSFET? I know that that part above the big solder pad is MOSFET, but this? The interesting thing is that on the board it is designated as RN200 which would mean that it is a resistor network, or am I wrong ?

 

[persivore]

Yea, its definitely a MOSFET. It is being used to switch the suppy from the Vdimm, between the 3.3v line when the board is powered up and 3.3v (produced by dropping down the 5v line) when the board is not powered up.

I've actually removed it on my board and connected the power supply to the large solder pad near the Vdimm MOSFET because it was causing a few problems with some other mods that I've got on my board.

 

[krusha03]

OK! Thank you very much for that info! I will try it in the next few days and tell you the results. Now about the 3,3v wire should I connect it to the big solder pad or the small one where the arrow point and says VDIMM? Because you said that it should be connected to the big solder pad, and the mod is to the small solder pad

BTW what other mods have you done to you MB? Can you post some links and pictures? For what mod in particular did this MOSFET cause problems?

 

[skandal]

HI, i'm new to the forum.

I knew about the Vcore mod by techup, and i decided to do it since my venice 3000+ was only at 2.45 with 1.45V and had 28º at full load, since this was too fresh to me, i decided to the mod with conductive silver ink, the mod only worked at the second atempt, since at the first time i did it, i didn't let the ink to dry, but the second shot worked fine, i used a hair drier (with very caution) to cry the ink it worked perfectly, now i have my venice @ 2.65 and 36º full load.

W1zzard, i think you didn't recomend this mod in another post, why?

 

[angrypond]

Hi
I tried the vcore mod using conductive paint. I dont think the mod worked at first try as when i set voltage to 1.100 it said the requested voltage was too low so i redid it and now
i've flashed my bios to 1.2, ocwbeta2, ocwbeta4 but it still doesnt work, either freezes at windows startup or resets the voltage to 1.350

i have a 3800x2

 

[angrypond]

i have nb-sb link at 800mhz and 16-bit, nb-cpu link 800mhz and 16-bit ddr at 166 and when i put vcore at 1.100 (1.500) i get the BSOD and when i put it at 1.050 (1.450 ) it just posts the name of my gpu on a black screen. This only happens when i put it above stock

 

[Tatty_Two]

Don't think the mod worked then, you are getting BSOD etc etc because there is not enuff volts to rev your CPU, try puttin the volts in BIOS on 1.450 at a sensible FSB speed and if she starts then that confirms the mod did not work.

I am not a great advocate of the conductive pen TBH, mine was soldered and works just fine.

 

[Tatty_Two]

ohhh and you do not need the OCW Beta BIOS anymore as all the historic issues with ASROCK's BIOS has now been sorted and when I said try 1.45 I meant 1.45 as opposed to 1.050 or whatever you said, 1.050 after the mod is actually 1.050! does that make sense? a succesful mod will allow you to choose 1.075 thru to 1.150 but of course if the mod failed they wont work which is why I said sat to the REAL 1.45, easiest is to flash BIOS with ASROCKS newest (1.20 I think) then try 1.45.

 

[angrypond]

ok thanks, would it maybe be because i flashed my bios after performing the mod.
i changed it back to 1.400 (max i acan go) and it worked. but when its on 1.075 or 1.100 or 1.1500 etc and its oc'ed even the tiniest bit it just post the name of the graphics card in the top left corner. Is this because its not getting enough power? im running 350w now
thanks

 

[Tatty_Two]

ok thanks, would it maybe be because i flashed my bios after performing the mod.
i changed it back to 1.400 (max i acan go) and it worked. but when its on 1.075 or 1.100 or 1.1500 etc and its oc'ed even the tiniest bit it just post the name of the graphics card in the top left corner. Is this because its not getting enough power? im running 350w now
thanks

What motherboard u got? I would suggest doing the mod again and 350w is a little low if you have a few bits inside pc and are overclocking your cpu also.

 

[angrypond]

asrock dual sata2, ive done the mod twice and might buy a new psu

 

[djmas0n]

Good forum, cool thread.

I have a question, you showed a video toasting a 1/8 Watt Resister running this much voltage thru it. So what is a good wattage rating to have on the resister for this mod? I picked up some 510 ohm, 1 watt resisters at Fry's and I'm wondering if they will be sufficient for the variable voltage mod.

TIA

 

[v-zero]

Digging up an old-ish thread here, but I need to ask something...

Does anybody know whether the Vcore mod is the same on the asrock 939sli boards as it is for the dual?

Thanks.