Hey guys thanks for the pics.
It looks like it might be the LM358 chip. That is the chip used for Vdimm control on the P4C800-E and and the P4P800. I wonder if this chip is being used for Vdd here??
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Hey guys thanks for the pics.
It looks like it might be the LM358 chip. That is the chip used for Vdimm control on the P4C800-E and and the P4P800. I wonder if this chip is being used for Vdd here??
not sure but thats between teh agp slot and first PCI. so its most likely vdd. could be somethign else though. cant say for sure.Quote:
Originally posted by TechTones
That chip looks like the same chip that gets modded for the Vdimm mod on the P4P800. Looks like the Vdimm chip to me.
Unless it can be used for Vdd too.
if needed i have micro grabbers, i can do a test mod real fast before i ship my an7 back. mines broken but i can still see voltages.
i have a 1k ohm variable pot setup, so if i can use that and test a pin on one of those IC's let me know. ill try it.
Yeah let's try it and see if the Vdd moves. Can you into the bios to see the vdd?Quote:
Originally posted by Evil_Spork
not sure but thats between teh agp slot and first PCI. so its most likely vdd. could be somethign else though. cant say for sure.
if needed i have micro grabbers, i can do a test mod real fast before i ship my an7 back. mines broken but i can still see voltages.
i have a 1k ohm variable pot setup, so if i can use that and test a pin on one of those IC's let me know. ill try it.
i can boot but overclocking is no go.
i can get to windows even but ya.. ill fire it up and check voltages, that works fine, bios is accessible. ill need to know what pin to attach where asap, though i doubt ill be able to send the mobo back tomorow, so ill most likely have the weekend. just tell me which pin to what and ill try, small soldering isnt exacly my forte but ohwell. like i said i have micrograbbers. and a 1kohm resistor setup for the vdd mod for my 8rda+, i also have two more grabbers and another 1kohm resistor.
OK Evil :devil:Quote:
Originally posted by Evil_Spork
i can boot but overclocking is no go.
i can get to windows even but ya.. ill fire it up and check voltages, that works fine, bios is accessible. ill need to know what pin to attach where asap, though i doubt ill be able to send the mobo back tomorow, so ill most likely have the weekend. just tell me which pin to what and ill try, small soldering isnt exacly my forte but ohwell. like i said i have micrograbbers. and a 1kohm resistor setup for the vdd mod for my 8rda+, i also have two more grabbers and another 1kohm resistor.
Let's do it. follow this guide for the LM358 chip but don't use a resistor of course. As you can see he is doing a vdimm mod, but it looks like it might be used for the Vdd chip too. I suspect it will adjust the Vdimm on the board, but let's see. He uses a 15K Ohm resistor to get .30v more, but we have no idea if these same values will work here. So, try your 1K pot first. Do you have a 10K also?
OK go here and use IC leg 6 as your feedback pin and ground the other end. The guide is a couple pages long here.
http://www.cluboverclocker.com/guide...800%2De/p2.htm
Make sure you observe both the Vdd and Vdimm in the bios to see which moves. At least if we find the Vdd IC, we don't need to check the Vdd off a leg, just from the bios now.
Evil,
you need feedback pin 6. Check where pin 6 is from this pic. Notice where the dimple is {little circle} in reference to pin 6. Very similar to the NF7 mod on pin 6.
ill see if i can pick up a 15k resistor, i thnk i can get single resistors for like 15cents or soemthing. ill pick up a small range of them, 15k, 10k, 1k, 500k, ect ect. that kidna stuff.
i Have exactly the same problem as sites previoulsly mentioned in the thread: -
I bought the XP 3200+ at the weekend to replace my 2500+, i have just got round to plugging the CPU in the board only to find that the CPU is overvolting. The system default should be 1.65v which ive checked, but it is defaulting 1.844v and the into the voltage section of the bios reporting 2v . So i then proceeded and reinstall the old cpu to find the same thing, and then also and older XP 2000+ paliomino core cpu and the same thing again. So i reset the bios and nothing. I have reflashed the bios and the same thing again. Tried the latest bios revision and the same thing still occurs. So basically all the time it is making my cpu vcore have a default of 1.844v, regardless of cpu i place in it. I have selected the user define section to pull the voltage back down to the defaults. Saved that and restarted and returned to the bios the bios reports the chip as being set as 1.65, but in the voltage monitoring section it still reads 2.0v's. I have tried it all the way down to 1.3v but still reading as 2v, i also no that the readin in the voltage monitorin is correct cause my cpu temps are way higher than normal.
here are my system spec cause ill know you wll want to know them
AN7 rev 1.0
XP3200+ barton 400fsb
OCZ 2x512mb PC3500 Dual Platinum LTD edition (BH-5) chips
Sapphire 9800pro 128mb
Maxtor SATA 120gb hd
Enermax 350w psu
Watercooled dangerden maze 4's on cpu and graphics
(Gud job i have this to keep the chip at a relatively cool level whilst experencing these isuses)
I know that psu can handle whats in my system fine, the voltages do not fluctuate at all. But the problem is that the bios is not remember the settings I set it to. I mean i can set the CPU Vcore down to 1.375, yet the cpu voltage readout is always reading as 2.1v 's and i know that a barton 3200+ has a default voltage of 1.65. But why does the board think it has a default of 1.844v. So why would my PSU have any thing to do with this at all. If the PSU was failing wouldn't my voltages drop and fluctuate alot.
Plus i know that my cpu is being over volted is because my cpu temps are about 10c hotter than normal.
The board has been working fine with the 2500+ in but now it doesnt as every CPU i try in it is getting overvolted, so it is the board that is the problem.
(Sorry for the long thread but i just wanted to make sure that everyone understands the problem so that i can recieve some help cause im all out of ideas at the moment )
CHEERS!!!
i got the same thing, nothign helped it. and thats probably why my temps soared to the upper 50's.
i found no way to fix it so i just set the voltage myself, and that worked. useing default was all weird like you said.
however when i change any of the voltages it still reads 2v + in the voltage monitoring section an in the uguru in windows.???
hmm... only thing i can think of is RMA
LOL.... goodluck.
Are you sure the temps/voltages are accurate? Cant really trust the bios temps but on my NF7 the voltages in the bios are usually pretty close, +- 0.05. If it's really giving the CPU 2v and changing the bios settings or reflashing doesnt work, then you've got a defective board (Haha, isnt that ironic. A defective board out of an entire defective shipment :)).
my AN7 had perfect voltage readings in the bios and windows was only off by a small amount.
my TEMPS however were HORRID. with default out of the box it was perfect in both reguards, then with bios 13 it all got shot to hell and temps read about 10* high and then later it died... oh well. im guna RMA for a refund and wait till i buy a new mobo. i want an AN7 rev1.2 or 2.0 whatever they call it. i saw such amazing bandwidth with the AN7 at the same speeds compared to my epox it makes me want another. but alas.. i just dont know.
ahhh SHOOOTTT!!!
i cant tell which is pin 6!
thers no dimple. do i assume pin 6 is the top left corner?
also any ideas for where check points may be?
i REALLY dont want to murder my ram if this somehow the vdimm. where would i check?
See if the the dimple is on the side of the chip. There should be some kind of orientation marking. You should look for something out of the ordinary on the chip top or sides.
Check in the bios under voltages. It shows all the voltages in the bios monitoring. No need for check points.Quote:
Originally posted by Evil_Spork
also any ideas for where check points may be?
i REALLY dont want to murder my ram if this somehow the vdimm. where would i check?
but dont i need to put ram in the board to get to the bios? i just dont want to accidently kill my ram. that would be BAD......
i have a lil rig setup with the 15k ohm resistor, and i found a connection between one leg of the IC and a nearby mosfet. they show the same resistance. ill post a pic of which in a sec.,
You know, I know the board will turn on to a degree with no ramQuote:
Originally posted by Evil_Spork
but dont i need to put ram in the board to get to the bios? i just dont want to accidently kill my ram. that would be BAD......
i have a lil rig setup with the 15k ohm resistor, and i found a connection between one leg of the IC and a nearby mosfet. they show the same resistance. ill post a pic of which in a sec.,
and current will pass thru but I don't know if you can enter the bios itself without ram.
Have any cheap PC2100 laying around?
Even if it is the vdimm, it's limited by your 3.3v line. At the most even if you manage to fudge it up and give it max voltage, it'll only be about 3.2ish assuming your 3.3 is in fact 3.3. That wont hurt your ram.
heres the pic of my finding.
...That looks like pin3 to me on the LM358 doesnt it? Lemme check the whitesheets on it.
It might be pin 3. Hard to tell with no markings.
my 3.3 is VERY low right now due to messing with my psu. so i guess ill give it a try. ill have to go steal my generic pc2700 from the other comp if i can.
check that pic there and see what you can make of it.
i had ~14k ohm resistor going from the green IC leg to a fan headers ground. the board was on my workbench at the time, and i had teh mod attached, then i checked a few spots. checking the ground pin i was using to that mosfet leg gave me the sam resistance as the resistor im using gave me when tested alone on the workbench with my multimeter. any ideas?
im on evilspork3 on aim, hit me up there.
ok i give up, i just took a really bright light to the chip, its exactly the same on all sides. what gives!
Look at the little solid line running along one side on top of the chip. Does one end look thiner of thicker to you?