SPCR

Well, I can definetly say that the MSI6308 (KT3) is NOT undervoltable - it's voltage range is from 1.725V to 1.850V - that's enough headroom to O/C, but not undervolt...

The 1.4 GHz XP1600 is designed for 1.75V - I've unlocked mine and overclocked it to an 1.67 GHz (XP2000), and I've been able to undervolt to 1.725V. I'm really tempted to get a new mobo and see just how low I can go with the voltage! BTW, at the 1.67GHz, the CPU's at 46 degrees (volcano 7, panaflo 12V), and stays at 46 degrees when I underclock to 1.05GHz, but drop the panaflo to 5V(for supersilence!). Any problems with these temps?

And any suggestions for a good SocketA mobo with lots of bios features (as well as USB2?) I hate onboard sound and Lan, so I don't care for those...[/i]

Check out the nforce2 boards from Abit and Soltek. They both undervolt to 1.1v. There's a link to the Soltek review around here somewhere, or google it.

nan0dog wrote:Check out the nforce2 boards from Abit and Soltek. They both undervolt to 1.1v. There's a link to the Soltek review around here somewhere, or google it.

Yeah nan0dog, thanks for the advice. I've already bought and installed the Soltek

Here's MY review of the massively undervoltable SOLTEK FRN7-L:
It's a kickass board! It has nForce2Ultra, which includes niceties like USB2.0, dualDDR, and a lot of user-tweakable features. As for the BIOS, the votlage can be adjusted from 1.1-1.85V, while the FSB can go from 100-230 (this board IS capable of a 200MHz FSB - many reviews are out of date on other websites). I don't know how well the T-bredB's or Barton's are unlocked - I have a Palamino which I've unlocked, and I can raise my 1600XP to a 2100XP! The main con is the lack of HSF mounting holes for sooper-heavy heatsinks. It was also really cheap ($130 Canadian after tax), and has onboard lan and sound (which I don't use for a number of reasons). Oh yeah, and apparently some come with a fan on the northbridge while others don't - just get a zalman NB heatsink if yours has a fan (and hence the smaller HS). Hell - get a zalman anyways - they look threatening

For quietness:
I was able to undervolt my Palamino XP1600 to 1.45V, and with a 5V panaflo on a Volcano 7, I have 57 deg while folding (on-die temperature - not the stupid mobo thermal sensor which says 47deg). It's a perfectly fine temp for the palamino.

oogabooga wrote:
Here's MY review of the massively undervoltable SOLTEK FRN7-L:
It's a kickass board! (...)

For quietness:
I was able to undervolt my Palamino XP1600 to 1.45V, and with a 5V panaflo on a Volcano 7, I have 57 deg while folding (on-die temperature - not the stupid mobo thermal sensor which says 47deg). It's a perfectly fine temp for the palamino.

Sound interesting.

Does it support SpeedFan?

Bye egghat.

Yep - that's actually the proggie that I'm currently using to get my temps.

oogabooga wrote:Yep - that's actually the proggie that I'm currently using to get my temps.

Does it support setting the FanSpeed too? (I had an older Soltek board, which was rather cool, but couldn't set the speed of the fans via software. It took three weeks to confirm this; the Soltek support guy's English was rather bad. But at least they answered; all my questions to Asus are still unanswered ).

Bye egghat.

I hadn't even thought about that - it could have saved me from having to buy that other FanMate I'm going to need, but alas, SpeedFan cannot control the fan speed. Maybe they can fix it in software

I'm thinking of doing an undervolted P4 rig and was browsing through the Albatron website. The pdf for the PX865PE PRO II says that it's undervoltable down to .875V.

The DFI LANParty KT400A also seem able to undervolt down to 1.1V.

It's in german.
http://www.hardwareluxx.de/cgi-bin/ubb/ ... 00036&p=11

2nd picture in 1st line:
http://www.hluxx.de/Images/DFI/DFI_KT40 ... 0_0019.jpg

The Gigabyte 7NNXP nforce2 ultra 400 ATX board seems to undervolt to 1.1v. Onboard p-ata and s-ata raid, Intel csa gigabit lan. I just ordered one, so I'll let you know. See review http://www.digital-daily.com/motherboar ... ndex05.htm

Tomshardware is reporting on voltage-range for a handfull of Nfroce2 Ultra 400 Motherboards:

* Abit NF7-S 2.0: 1.1 to 1.85V in 0.05V increments
* Aopen AK79D-400Max: 1.1 to 1.85V in 0.05V increments
* Asus A7N8X Deluxe: 1.65 to 1.85V in 0.025V increments
* DFI LANParty NFII Ultra: 1.1 to 2.00V in 0.025V increments
* Epox EP-8RDA3+: 1.4 to 2.2V in 0.025V increments

The Gigabyte GA7N400 Pro is undervoltable 1.1 - 1.85V

Nice board...very nice, as a matter of fact, and probably the last 32 bit AMD board I'll ever own.

Pete

BTW, isn't it possible to undervolt more then the official selections by using the pin method ?

Pin method: Using tiny wires between the Vcc or Gnd pins in the socket and the right VID-pins to override the Voltage-ID. (same method as overriding multipliers just doing it on the VID in stead)

I'm very glad to contribute to this great website.

I was looking for Albatron motherboards, and while searching I found very good news. According to this and to the original motherboard manual I downloaded from the Albatron site, this is the achievable Vcore range:

Min: 0.8375V
Max: 1.6V

No life for over*! Straightforward P4 undervolting/underclocking!

Albatron PX865PE for candidate.

Bye!

kamina wrote:Don't know if it's on the list...

MSI K7D dual socket A with MPX chipset. From 1.1 -> 1.85v, but it undervolts by 0.4-0.5 resulting in 1.05-1.8v.

need a model number and more chipset details!

Undervoltable Motherboards in the Recommended Section has been updated with all the confirmed info in this thread from ~mid March.

I think all the PX865PE motherboard should undervolt.

Hi all this is my first post. Since Im a silent-pc fanatic I thought I should add my motherboard to the list. Im using a epox 8k5a2+ which has the following specs.

CPU multiplier can be selected from 6.0X up to 12.0X in 0.5X steps, and from 12X to 15X in 1X steps. VCore can be selected from 1.4V up to 1.85V in 0.025V steps and from 1.85V to 2.20V in 0.05V steps and VMem from 2.50V 3.20V in 0.1V increments.

Beware the AOPEN AK79G and AOPEN MK79G. I very nearly bought one because of the good price and ability to undervolt to 1.1V, but discovered at the last instant that THEY DON'T SUPPORT MULTIPLIER ADJUSTMENT.

I'm looking for an N-forcer which can run a Tbred at 5.5x166 @ 1.1V with 3 DIMMs, MCP-T audio, LAN, onboard VGA w/TV out for a HTPC project.

I'm not too sure about Leadtek motherboards and the layout seems odd, but so far only the Leadtek K7NCR18G pro seems to fit the bill.
UKers can get 'em from www.dabs.com for 95 quid.

Shuttle AN35-N is undervoltable(Nforce2 Ultra 400)
1.10 - 1.85 V /0.025 V

Hi!

I've just read the whole thread, and the list of undervoltable motherboards.

I'd like to make some corrections to that list from my personal experience.

All Abit KD7 models -> listed as 1.1-1.85V, but it's also listed in discontinued motherboards as 1.1-2.325, which is the correct answer.

Asus A7V333 (all models) -> One model has not the block of jumpers, the Asus A7V333-X (KT333+VT8235), which is BTW the most easy to find now in shops.

Earlier models of Asus Socket A mobos, also have those blocks of jumpers, meaning that undervolting is also possible with those motherboards...

I'm also looking for Micro-ATX undervoltable motherboards... the first and the only smaller-than-ATX mobo that I've heard of is also the one of Shuttle SN45G...

Vaeltaja wrote:Abit NF7-S v2.0 is CPU undervoltable. In 0.025V increments, if I recall from 1.1V upwards. Currently we have two NF7-S boards running AMD T-BredB 1700+:s at 1.30V (1.6V default) with a slight 5% overclock. Both CPUs are stable through Prime95 and pass memtest86. Note: I do not know whether this degree of undervolting is normal with 1700+ processors though; it is quite possible that we have gotten very lucky.

My personal experiences are at least equal to yours, and with some "selected" CPUs better...

When Mike has a little spare time to correct and edit my horrible English, he will add an article I sent to him about "Thoroughbred-B Undervolting"

nan0dog wrote:The Gigabyte 7NNXP nforce2 ultra 400 ATX board seems to undervolt to 1.1v. Onboard p-ata and s-ata raid, Intel csa gigabit lan. I just ordered one, so I'll let you know. See review http://www.digital-daily.com/motherboar ... ndex05.htm

intel csa gigabit lan on a nforce2 board?

The AOpen MK79G-N is a micro-ATX nForce2 IGP [Crush 18G], nVidia MCP chip board with Integrated GeForce4 MX Graphics, Vcore 1.1-1.85V. As a bonus, it has SilenTek & SilentBIOS. I'd like to get my hands on one!

Harry Azol wrote:

nan0dog wrote:The Gigabyte 7NNXP nforce2 ultra 400 ATX board seems to undervolt to 1.1v. Onboard p-ata and s-ata raid, Intel csa gigabit lan. I just ordered one, so I'll let you know. See review http://www.digital-daily.com/motherboar ... ndex05.htm

intel csa gigabit lan on a nforce2 board?

Hey, if Microsoft and AOL can get in bed together, why not Intel and AMD?

Another AOpen nForce2 mATX - embedded VGA boards w/ good Vcore control: MK79G-1394

I'm using a Gigabyte GA-8PE800 with a PIV 3.06 processor. The motherboard allows voltage adjustements in 0.0125V steps from 0.8385V to 1.6V. My cpu is currently undervolted to 1.3V. With only 2 fans in the system (PSU and CPU -Zalman 7000alcu at minimum voltage) and an ambient temp of 27C, idle temp is 39C and under full load it is 56C.

With Gigabyte's EasyTune4 you can change the Vcore in windows. EasyTune4 also lets you adjust CPU, GPU, PCI, and memory frequencies in windows. You can monitor CPU temps and the RPM of the fans. This all can also be done in the BIOS.

http://www.gigabyte.com.tw/MotherBoard/ ... 8PE800.htm

MikeC wrote:The AOpen MK79G-N is a micro-ATX nForce2 IGP [Crush 18G], nVidia MCP chip board with Integrated GeForce4 MX Graphics, Vcore 1.1-1.85V. As a bonus, it has SilenTek & SilentBIOS. I'd like to get my hands on one!

Another AOpen nForce2 mATX - embedded VGA boards w/ good Vcore control: MK79G-1394

Hi Mike!

Have you tested or seen them by yourself? I don't see anywhere that they provide Vcore control...

deebass wrote:Hi Mike!

Have you tested or seen them by yourself? I don't see anywhere that they provide Vcore control...

I downloaded the manuals & checked. Looks like 1.1-1.84V is pretty standard for a lot of AOpen boards; I have 2 that also provide the same (vert similar, anyway)...