Dothan overclocking thread

[agent #2]

Hi

I have a question about the DFI Vcore mod. What's the function of the FB wire/connection and what resistor is that.

Sorry for the noobie questions, but I don't know much about this stuff.

[hanzi]

here's the linky to the data you requested for the aopen board. regarding dividers, i wouldn't expect them to add more, as they were pretty much all one could ask for - higher ones wouldn't probably do you any good

hanzi,
try this (posted at forumdeluxx.de *german*, but the pics should do the talking anyway, and austria... guess it's some kind of german after all hehe) - it's the pinmod done on the dfi board, but as the cpus would be the same, so would the socketlayout. this pinmod should work the same on the aopen board.
i've seen people do another kind of vid mod using dipswitches & removing some smd parts. this was posted by kyosen and macci somewhere around the start of this thread.

and your english isn't that bad - seen worse actually. oh and i can't stand people excusing themselves before even making errors...

Looks really nice.
A lot less work than a real VCore mod. I will try this tomorrow.
Big Thx to you

This should get my CPU stable on higher clocks
I only need better cooling (i already orderd a noiseblocker bad boy which will be modded for fitting on the pentium-m) and better ram.

[charlie]

Tried a couple of things last night.

With my rad x800pro, 150 work like a charm using 37 lock. A couple more mhz on the fsb and i get all sorts of freaky behavior. Icons on desktop take forever to draw, occational bsods due to ati driver faliur and so on. 160 fsb is impossible.

So I swapped the radeon with an old gf 4200 card, suddenly 160 fsb was fully benceheable, ran a 3dmark01 without hickups. Now for the weird part, 161 was a complete no boot. It locks up during post.

Then I tried with a matrox pci card, 160 works like a charm, 161 worked the first time only. Superpi worked fine, didn't test anything else. Reboot and then full stop during post. Tried numerous times but it was a no go.

As for any reason why, it will be only be speculation. I do not have any tools for measuring agp speeds.

Chipset/Bios sems dead in the water past 160. Might be curable with a chipset vmod. I can't test this as the board has to be returned to the retailer I have borrowed it from.

As for the locks, see below

PRECISELY my experience with the DFI.......

[MaSell]

some results super pi 4M and 16M?

[kristos]

I went to the post office today to pick up my dothan 1.6 + dfi dothan compatible motherboard.

So when I got home, I wanted to check it out offcourse, play around with it a little bit.

but it didn't boot.
I tried 3 different ram sticks
3 different videocards + onboard video
nothing else is hooked up (except usb mouse + keyboard via the ps2 connectors)
I cleared cmos
I tried with the fsb jumper on auto and 100mhz
the fans that are hooked up to the board spin up.
I loosened the cpu heatsink and just placed it ontop without bolting it down.


What else can I try?

it's not like I have a spare dothan or dothan mobo lying around...







Oh, and a question :

Does the FSBjumper (auto, 100mhz, 133mhz) make any difference in overclockabillity or stabillity?

[perkam]

What else can I try?

Sorry to hear that kristos, I can understand that with everyone threatening FX chips with their dothans (and Macci having one ) you'd be very dissappointed...

I'd recommend contacting DFI Tech Support about the possibility of RMAing it or perhaps pm anyone else here that has a DFI board (you'd find a few in this thread alone) if they encoutered similar problems.

Perkam

[jjcom]

sounds like my AXP board. DOA. so yeah I had to RMA it.

jjcom

[Charles Wirth]

Re install the processor. I had the same problem. Make sure you turn the screw on the CPU socket all the way to the locked position. It gets firm at half way.

[Tony]

Just started testing,vdim mod works well DFI board.

DDR520 with 3500EB 2.5-2-2-5.3.4V or so...check the DMM

CPU is 1.6 that does 2.6@1.33V.

PCI vid card for now and no OS...testing continues.

[death metal]

bigtoe, that's holy freakin' awesome!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[charlie]

Just started testing,vdim mod works well DFI board.

DDR520 with 3500EB 2.5-2-2-5.3.4V or so...check the DMM

CPU is 1.6 that does 2.6@1.33V.

PCI vid card for now and no OS...testing continues.

Weren't brave enuff to slip the OCZ DDR Booster in there?
Will be anxious to see if you experience the same gpu probs as a lot of us...

C

[Tony]

Weren't brave enuff to slip the OCZ DDR Booster in there?
Will be anxious to see if you experience the same gpu probs as a lot of us...

C

Charlie

Well I have a PCI geiger and I can tell you the PCI lock is fine, AGP lock however may be a whole different story. I noticed nvidia cards may do better but all I have is ATI here so I may be out of luck.

Regards the booster Fugger explained he now has to use the booster to get the board to boot a while back so i thought a 100k Pot was a better option

death metal

thanks m8...more to come i hope

[death metal]

death metal

thanks m8...more to come i hope

bigtoe, i'd like to see a few CPU/MEM benchies with that baby...Super Pi, Everest and Sandra CPU and Mem test would be really nice. And if you can snag a 6800 in there, then 3DMark01SE would be nice benchies to see =)....it is exciting times indeed!!!

[Tony]

No chance of anything 3d...sorry

I will do sandra and everest and pi etc as soon as the OS is loaded

[Shep]

I did some last minute research, and may have found a way to prove that AGP lock is partially working. Just as the pci lock. In other words 66/33 = no lock. 75/37 and 88/44 works, but with occational hickups.

This is on tha Aopen board, using the 105 bios atm. 101a and 101c behaves in the same manner.

So the reason why the Ati cards fails earlier seems to be chipset/bios/driver related.

Well will check some more tonight, before i have to pack everything togheter and return it to the reseller tomorow.

[MaSell]

some results super pi 4M and 16M?

someone can answer for my question?

[Tony]

Well the board has issues with CPU-Z at higher fsb's so i have had all sorts of issues running clockgen. I also can memtest for hrs at ddr500 but XP seems a no go. fastest 1M pi is 31secs upto now around 2.5GHZ+ so this is pretty damn fast. I will probably have to do a Vcore mod..anyone got a nice easy mod with pics? Im after adjustability so removing the resistor is not for me

Im still workin on debugging what i have here, for now i have disabled everything in bios and im using a pci vid card and 3com pci nic as i know the bus is at 33.3.
Seems the cpu just locks with cpu-z which points to an access violation maybe...

More as i get it.

[Tony]

someone can answer for my question?

1M was 32secs with these settings, the rest are valid for this config. 150x16 with ram at 200fsb.

[agent #2]

I did this mod yesterday and it worked fine.
http://www.forumdeluxx.de/forum/show...0&postcount=93

[Tony]

I did this mod yesterday and it worked fine.
http://www.forumdeluxx.de/forum/show...0&postcount=93

Did it allow you still to set lower in bios or was the vcore fixed at the pin mod value?

I have done this mod many times with P4's and some bios files still allow you to set lower values, so im just checking if this does or doesn't.

Thanks

[agent #2]

It's a fixed vcore mod. 1,6 volts it says here.

[charlie]

No, no, no.........
If you do the VID4 to VSS mod (as I did) it will give 1.59V @ 1.34V default BIOS setting, but setting the BIOS to a lower setting, like 1.20v will give a lower reading, maybe 1.45v....
So I'd suggest doing a VID4 and a VID 2 which I THINK gives 1.67v and adjust it in BIOS..........

C

[charlie]

Bigtoe,
I really like the Dothan stuff, my 1.7 does 2.7 with a Swiftech NB cooler, lol but the "glitchiness" with ATI gpu's is a serious downer....
I hope you can shed some light on it! And yeah, the clockgen is VERY buggy for me on the DFI. AND note the glitchy 150+ where the windows slows down and icons won't open then it blackscreens and gives a Display Driver Erroe upon reboot.

C

[Fun Guy]

Since you guys here are on the cutting edge, please help me choose a heat sink for my 755 and AOpen board that is on the way. The thread is here. Thanks.

[STEvil]

Charlie - may try replacing the clock crystal on the video card to see if that clears up the video issues maybe... test with a "dead" card first though of course..