Assistance to the interactive AMD Socket AM2, Socket 939 and S 754 CPU Pinmod guides
The introduction …
In order to obtain a good CPU overclock result, usually an increase of the Vcore (CPU voltage) is necessary. One should naturally always watch the CPU temperature and improve the cooling if necessary. Since the Vcore cannot be changed however with all Motherboards, or often only very slightly, there’s now the new Pinmod guide for current AMD Socket 939 and Socket 754 processors.
The new interactive Socket AM2, Socket 939 and AMD Socket 754 Pin Mod guide calculates not only the Vcore pins, but also which pins on the basis of the original Vcore really have to be changed for the Vcore increase. If no connections are indicated, this CPU voltage is not adjustable due to the original CPU voltage.
Of course the guide was tested several times, however the Redaktion ocinside.de has only a limited budget, which isn’t unfortunately sufficient to test all current AMD Athlon 64 CPU types. To that extent I would be pleased very about feedback in our overclocking forum, thus possible errors on different processor types can be solved much faster.
The Socket 939 Pinmod guide can be used by the way also with Socket 939 Opteron processors. But please don’t use it with Socket 940 processors, because processors for the Socket 940 have another pin layout !
The Pin-Mod method with the wire loop under the CPU …
In the first version of the interactive Socket 939 / Socket AM2 / Socket 754 Pinmod guide is no choice, whether one would like to use small wire loops on the lower surface of the CPU, or prefers connections in the Socket. For this reason only the first method with the wire loops is described here.
For the Socket 939 Vcore Pinmod one selects the original Vcore of the CPU in the field “Original CPU Vcore selection” which AMD gave the processor (check it briefly in the BIOS, or in the interactive Athlon 64 CPU ID guide). Hereby one facilitates oneself the work substantially, since one only must connect the pins, which are actually necessary. Then select the desired Vcore in the field “Select the desired Vcore”, which one would like to get after the modification.
Now there’re already shown all pins, which one have to change for this Vcore. To connect the pins under the CPU take several fine wires (e.g. an individual cord inside of a HDD or a floppy cable), loop this wire once around those two pins, twist each ends and pinches off the unnecessary wire.
Here’s a small screen sequence for the modification …
Twist the wire once around the two pins:
Cut the wire a little bit and twine it carefully (e.g. with a tweezers):
Pinch off the unnecessary wire:
Et voila, that was it. And if things doesn’t work out in the first one, drink a coffee less and simply try it again. Important is only that the correct pins are connected at the end – each error could have bad consequences !
The result can be combined depending upon the voltage regulator IC …
As already mentioned briefly in the interactive Pinmod guide, if necessary still another meaningful combination of the new CPU voltage and the BIOS can be done after the modification. Because some Motherboards permit a voltage correction and/or the Vsen setting of the voltage regulator IC in the BIOS. The Mainboard manufacturer e.g. EPoX often offers the BIOS option +0.1, +0.2 or even +0.35 V. Thus the CPU will have a voltage of e.g. 1.75 V (or even 1.90 V) after the Vcore modification to 1.55 V, if one increase the voltage correction in the BIOS to +0.2 or +0,35 V. But a direct Vcore setting is no voltage correction, but likewise a change of the VID ! If there’s a fixed voltage adjustment of e.g. 1.400 V in the BIOS, the highest Vcore “produced” with the Pinmod is maximally 1,550 V by the 5 VID pins (VID0 – VID4).
Still higher rise of the CPU voltage by BIOS after successful Pin-Mod:
The result is a combination of both voltages (1.55 Volt Pinmod + 0.2 Volt BIOS):
Further versions of the interactive AMD Athlon 64 Pinmod guide …
The interactive AMD Socket 939 Pinmod guide (and Socket 754 / AM2) will get still some updates in the future and I won’t give up to find solutions for the CPU multiplicator increasement. Until then I’m pleased about an extensive feedback in the forum and who needs a new CPU or a better CPU cooling, should visit our sponsors.