Asus A8V Delux Volt mods!

[BTBJP]

I could not find a thread already (stupid search will not let me do A8V)

Does any one know the vdimm mod for this board?

On Futuremark forums jason57570 said this

"vcore uses a ground sense circuit that feedbacks to the pin #7 FB so you have to fool pin #6 of sc2643vxts chip by "REMOVING" a resistor yes ya have to rip it off the board with tweezers next use 500-1k ohm resistor and start for 0ohms and work up to increae vcore..

vdimm is pin #6 of LM324 chip with 50k VR and vdimm is PIN #5 of RT9173b chip "

I have asked him about which chip (there is a few LM324 chips on the board) and asked to post pictures but have not had a reply yet.

I thought i would ask on here as other people who are getting the board are going to want to give their ram more than 2.8v or 2.9v.

Cheers..

[pkrew]

I believe this is the correct vdimm mod. Pin 6 to ground

[BTBJP]

Hi,
Thanks alot for the picture!
and i guess that pin 5 on that other chip to ground is for voltage reading?

[BTBJP]

Ok i made a better picture

http://www.richardpike.co.uk/A8V-Vdimm-Mod.JPG

[cpulloverclock]

some pics


http://219.113.251.125/c-board/file/A8V_Vddr-mod_1.jpg
http://219.113.251.125/c-board/file/A8V_Vddr-mod_2.jpg
http://219.113.251.125/c-board/file/A8V_Vcore-mod.jpg

[BTBJP]

So the pictures that pkrew and i posted for the Vdimm mod a wrong?

From the pictures you posted there are 2 vcore mods and 1 vdimm mod?

[Malves]

No, the pic you posted is right, too. Actualy the second pic cpulloverclock posted is the same vdimm mod you posted, only difference is that kyosen uses pin 11 of LM324 for ground, which is right, too.
First pic is another method that can be used for vdimm mod, by replacing R422 with a trimmer.
Third pic is the vcore mod for this board.

[BTBJP]

Ok thanks, its just the 2nd picture there (the mod i have done other than different ground point) is called a vcore mod when it atcualy is vdimm...

[xgman]

Has anyone gotten the TAM's method to work? (the 2nd one)

[BTBJP]

I have used the TAMs method but for Vdimm and by grounding to a motherboard screw. I cant see how its ment to adjust the vcore like it says in that picture.
Oh and for it to work i have the vdimm set to auto in the bios then adjust the VR and read voltage from the voltage point just next to vdimm chip.

[GomerPyle]

What resistor used for vcore mod? Can it work with a 10k vr set to max and then lowering will give higher volts?

[BTBJP]

If you are doing this
http://219.113.251.125/c-board/file/A8V_Vcore-mod.jpg
Vcore mod then you need 100 ohm VR

[Symphysodon]

mhh.. the mods looks nice...

Which default overclocking options are given with de A8V with the current BIOS?

Max. Vcore / Vdimm in which steps?

HTT and Multiplier in which steps ?

I haven't got the board yet...

Best Regards from Germany...
Symph

[charlie]

Originally posted by BTBJP
I have used the TAMs method but for Vdimm and by grounding to a motherboard screw. I cant see how its ment to adjust the vcore like it says in that picture.
Oh and for it to work i have the vdimm set to auto in the bios then adjust the VR and read voltage from the voltage point just next to vdimm chip.

when you do the Vdimm this method, what's your MAX Vdimm available?? I used Kyoshen method and have max 3.15v available, then windows locks up and won't post until resistance is lowered...

C

[BTBJP]

Mine has no vdimm as i have to send the board back to get one with working locks.

When i did have it tho the resistance was set so high that it only went up .1v over what ever i set it.

[wasky]

you are sure that this mod works?

thnx

wasky


http://219.113.251.125/c-board/file/A8V_Vddr-mod_2.jpg

[wasky]

thnx guys the mod works regularly, now the problem is a overcurrent protection for a vdimm beyond 3.15 volt

some tips for this problem ?


wasky

[JNav89GT]

is there a cap mod like the gigabyte 939 board for the A8V????
that would be best I think :)

[GomerPyle]

when doing the cap mod the OVP gets you :( Tried it and afraid it did not work. Had 3.45V but no post.

[JNav89GT]

Originally posted by GomerPyle
when doing the cap mod the OVP gets you :( Tried it and afraid it did not work. Had 3.45V but no post.
well that just stinks :O

[GomerPyle]

Kinda strange problem here: cant seem to make the vcore to work. Any HELP please? Soldered a 100ohm like on the picture but no raise in vcore....?

[JNav89GT]

hrm
mine worked fine.
maybe bad rheostat?

[Blaster]

Was any1 able to kill the OVP ?

... i needed at least 3,25v :(

[JNav89GT]

not yet.
Hell Fire has Pkrew's board and if anyone could figure it out I would assume he could.

[|RickY|]

What resistor used for vcore mod? Can it work with a 10k vr set to max and then lowering will give higher volts?

i think you need to start with 0 ohm like BTBJP tells:

vcore uses a ground sense circuit that feedbacks to the pin #7 FB so you have to fool pin #6 of sc2643vxts chip by "REMOVING" a resistor yes ya have to rip it off the board with tweezers next use 500-1k ohm resistor and start for 0ohms and work up to increae vcore..

[kraggy]

Hmmmmm, I have tried to read my voltage twice on pin #5 according to BTBJP's pic and it just shuts my rig down. I am afriad to try it a third time.

My mobo is a A8V Deluxe Rev. 2.0...do you think thats the problem? this thread was started on Rev. 1.0 A8V Deluxe...as far as I know the only difference is working pci/agp locks.

I really want to get more than 2.8v to my ram on this board. My FX-53 is begging!!!! :banana:

[Confused_User]

yes, I would like to know if these vmods work on the rev2 a8v also.....

:)

[Mongoose420]

okay, maby someone a little smarter than me can explain this.

My a8v undervolts .1vdimm for whatever reason make'n the best it will do stock is 2.7~2.71vdimm. So i did the vdimm mod. pin 6 to pin 11 with a 50k VR. Clear cmos and power up, check vdimm in bios and its 2.63v. Nice im not undervolting anymore. Set 2.8vdimm and save/exit. Board doesnt post, clear cmos and repeat still no post. Clear cmos and set 2.7vdimm, get 2.71v and it posts. 2.77vdimm got into windows then froze. Ovp setting in at 2.75vdimm? Unhooked vdimm mod, set 2.8vdimm in bios and still 2.7~2.71vdimm but at least it posted and is stable.

Anyone know of a reason why this would happen and better yet a solution for it would be much appriciated.

update, decided to hook in my speakers and get a cpu overclock failed warning if i set it .01v higher than 2.77vdimm. Tried grounding to a mobo screw and the same problem persists.

[WiruZDK]

hmm it does not seem to work for me i just return with a black screen when i choose 2.6v and save and exit i can see multimeter goes for 2.99v and no screen is coming and it doesent matter if i chose 2.7 or 2.8v it is just showing 2.99v and goes for black screen :(

this mod does not work for Rev 2

[Mongoose420]

mines a 1.02. Try a .1 overvolt at 2.6v and walk yourself up and see what happens. may have another of the stupidly low ovp boards.

[jax7480]

Same here for Rev 2.0 Board. Did the mod, clear CMOS and Save & Exit. Boot regularly at 2.64. Got into BIOS, set to 2.8 but no post. Clear CMOS again and got into BIOS. Enabled Post Reporter. Set Vmem @ 2.8 and restart. The post reporter said: CPU Initialization Failure.

P.S. Nice feature by the way.(post reporter)

Maybe I'll try an OCZ DDR Booster.

[jax7480]

Well I tried to vmod the mobo again but with no luck. I set the BIOS vmem voltage to 2.6. Did the mod but this time using a 200K VR. I booted up. Booted OK, taking a meausurement of 2.64. Lower the VR, meausure again, 2.7.... Lower again and again and it seems that the board stops at 2.9V. Anything above that and the board doesn't boot at all. I'll exchange it with the MSI and feed my BH-5 with the volts they need.

[sysfailur]

Looking for the CPU vmod for this board... if you have one please post here. This thread seems to be incomplete.

Edit: Also is there a vdd mod for this board? Thanks.