AN35N Ultra ddr voltage mod

[KubaWRX]

Hi, this is my first post here
Is there any voltage mod for AN35N Ultra? Especially VDDR mod?

 

[Balrog]

Yeah check this link out from over at AMDMB Forums, I don't know how well it works though.

http://www.amdforums.com/showthread.php?s=&threadid=277641

Welcome to the Forums!

Regards, Balrog

 

[KubaWRX]

Hmmm... that's my post over there
I just wonted to know if someone did that mod before. I wont to write a guide about that mod, but i will need some help. First, i need good quality picture of motherboard with visible area around left side od DIMM1 and bottom of AGP port (you can sed it to my email). I suspect that this mod can be even done with pencil. Besides that, I've two Buffalo PC3200 512 memory modules with Winbond CH-5 which, as you know, has internal voltage regulator and they are limited to 2.77V. So I can't test them to see if that mod give as any significant improvement in memeory performance on AN35N. That's why I will have ask someone to perform some test with better momery modules. So far I'm runing my modules with 2.9V for couple days without any problems. My tymings are 6-3-3-2 at 200 FSB, I can also run them at 220 FSB, but Prome95 unstable (maybe it's due my stock NB cooling). Now, I'm thinking about selling or tradeing my RAM for some 2x256 high end modules from Mushkin or Corsair, which can work with higer voltage.

If anyone will be interested in that mod, I can explain here how to perform it.

PS. English is my secend language, so please forgive me my errors.

 

[Balrog]

Sounds like a good idea to get some better memory Kuba, I'm happy with the 220FSB I'm running and as I don't want to screw up my 1 year warranty I think I'll pass on the mod for now. I've seen this board run 230FSB + with high quality Corsair and Mushkin so there are other alternatives if you want to really push things and still keep your coverage.

Regards, Balrog

 

[KubaWRX]

I can understand your fears Balrog, and I don't expect from you to mod your motherboard. To anyone who wants to try this mod, i think that is nothing to be afraid. You only have to solder a wire to one pin of IC Q36 and secend wire to any GND poin on MB. Then to those wires you have to solder regulated resistor - 2.2K Ohm. Those wires can be removed without leaving any trace od moding the motherboard. Also, this mod can be done with some soft pencil (B2), you have to apply graphite on resistor which is located nearby pin one of IC Q36 and DIMM1. When I was trying that, I did't have soft enought pencil so I was able to get only 0.05V higher.
Here is some picture od wire soldered to IC, sorry for bad quality, I had to take it in case under desk.

 

[AA666]

Regards from amdforums, Kuba

Some picts of AN35NU I found in reviews here, here and here. Some of them having good Q30 and Q36 shown, but not together. Also I'm unsure about (C) of these pict

BTW: I'm planning to get this Dual DDR500 from komusa for AN35NU. I can't find any complaints about this cheap memory and komusa have good reseller rating with positive feedbacks.

Good luck, AA666.

 

[sQUiRLy]

Also, this mod can be done with some soft pencil (B2), you have to apply graphite on resistor which is located nearby pin one of IC Q36 and DIMM1.

Hi Kuba.

I have a B2 pencil and would like to know which resistor is the correct one. An increase of .05V would be well worth the try.

Thanks