Yep 2.6+ G here. And I thought that this is the mobo limitation.
Anyway thanks for replying and helping me & others, there are evidences that this mod works for some, but for me it exactly the same as before the mod.
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Yep 2.6+ G here. And I thought that this is the mobo limitation.
Anyway thanks for replying and helping me & others, there are evidences that this mod works for some, but for me it exactly the same as before the mod.
Quote:
Originally posted by morphling1
Yep 2.6+ G here. And I thought that this is the mobo limitation.
Anyway thanks for replying and helping me & others, there are evidences that this mod works for some, but for me it exactly the same as before the mod.
Happy to help.
Just to clarify this again though, this mod will not help fix freezing problems in Prime or any other program (it was never claimed to fix freezing either). The mod is only to fix shutdowns (system powers down by itself) related to high Vcore. It's not quite fair to say the mod didn't work for you, when you were having a freezing problem.
Yeah but I relate to that problem because it acts exacly the same way, only without shut down. But it happens without any warning as soon as I start prime95 it locks. That's why I though it gotta be some sort of overcurrent protection too. The cpu shut down but the psu is still working and the mobo is powered.
Like you said, this must be the problem with mobo design.
Just a little bad taste on otherwise great mobo.
A bigger or different power supply MAY fix the problem. I think you are just running out of power and the CPU locks (not any kind of protection issue). Even with a bigger/better PS, you will still have a limit on how much current/power you can expect the Vcore supply to handle.
Good luck!
Even that isn't the problem I had that same cpu at 2865@2.15V prime 95 stable with chilled water on 8k3a. So PSU is more then good.
Hey just a thought, what does that other resistor do, R657 ?
The reason I metioned PS is that it's not only the amount of power, but also how CLEAN the power is. Also, any given PS may work fine on one board but not another. There is a variation in how much power each mobo uses and a lot of complex details that determine if a PS will be able to power a given mobo running "at the edge". If you have other supplies handy it would be worth testing. I'm not saying to go out and buy another one though.
I don't know what R657 is for, I never traced it out. After I cut the trace on my board, there was no need for me to try anything further because the mod was working for me at that point.
I have Antec truepower so the psu should give me clean lines.
I mention that resistor because I saw it on some japanese site circled in red, and the only thing I could read was Icurrent mod or something like that,web translators did't realy do the job fine so I could understand what the resistor do.
That's why I wonder what that resitor do.
hi
i've doing the "R678" mod , no shutdown for me , BUT my motherboard is unstable over 2.05v (v-core) .
i've a true antec 480w it's not a power supplie problem.
another thing:
v-core 1.8 max FSB stable 229
v-vore 1.975 max FSB stable 219...
it's strange
tested at 10.5 x 229 and 11 x 219
my 2700+ is stable at 2521 with 1.92v
i've found this :
what is this mod ?
http://holicho.lib.net/devilman/pc/8rda+_05.jpg
The R673 (the 2.6kohm) it substitutes in variable resistance. If value of resistance was reduced, it boosted.
(As for wiring of purple for tester)
the link: ( babelfish translation )
http://babelfish.altavista.com/babel...p=ja_en&tt=url
and original link:
http://holicho.lib.net/devilman/pc/8rda+.htm
this looks interesting....almost looks like he has found a way to increase the voltage to the mofsets. .......we need to check this one out closer.
but on closer inspection looks possible he found how to increase the cpu vcore beyond the 2.2v setting in bios.
and if you check his page looks like he is increasing the voltage to the agp slot.....i like it...........................
Yes, that does look interesting, wonder if that just increase vcore or it makes it stable.
So if I understand correctly he put 2.6k vr on the that removed resistor. And he measured voltage on mosftet with that purple wire and GND (multimeter in between :))
Hes just doing what I do to my board to measure votages.
Rather than rely on the often innacurate winbond monitoring I solder a wire to the Vcore output, VDD output VDDR output and use those wires to measure voltages with a decent multimeter.
Although I solder to the CPU pins to get Vcore as I have no back on my case, so I could solder there without moving anything (plus it might be a bit more accurate there)
Quote:
Originally posted by bowman1964
this looks interesting....almost looks like he has found a way to increase the voltage to the mofsets. .......we need to check this one out closer.
but on closer inspection looks possible he found how to increase the cpu vcore beyond the 2.2v setting in bios.
and if you check his page looks like he is increasing the voltage to the agp slot.....i like it...........................
Yes he does that on voltage regulator, but variable resistors instead of original smd's show that he does a little more then just monitor voltages
hello everyone..
I also have this problem with any voltage above 2.0V!
I removed the resistor but it didnt help!
My cpu is standard a barton xp2800 and even when I select anything above or at 2.0V at standard speed (2.075Ghz) the computer frezzes instant or wont boot up.
The CPU can do 2.5Ghz with 1.975vcore but I need a bit more ;-)
Btw. my cpu i dangerden watercooled and my PSU is a thermaltake 400W
NB: when I am using higher vcore (1.950v) the 5V is down to about 4.66V
Any ideas anyone?:toast:
its the barton chip my friend.not the board that i can see.Quote:
Originally posted by bias_hjorth
hello everyone..
I also have this problem with any voltage above 2.0V!
I removed the resistor but it didnt help!
My cpu is standard a barton xp2800 and even when I select anything above or at 2.0V at standard speed (2.075Ghz) the computer frezzes instant or wont boot up.
The CPU can do 2.5Ghz with 1.975vcore but I need a bit more ;-)
Btw. my cpu i dangerden watercooled and my PSU is a thermaltake 400W
NB: when I am using higher vcore (1.950v) the 5V is down to about 4.66V
Any ideas anyone?:toast:
i have been running mine for a while.the barton doesnt like more than 2.0v the max mine will run stable is 1.975 226x12@2712mhz
the same board will allow me to feed my xp2600 to 2.2volts if i need.but most of the bartons will not take over 2.0v
sorry
damn that sux.. are U 100% sure?
well i am affraid so.:(Quote:
Originally posted by bias_hjorth
damn that sux.. are U 100% sure?
i tested mine by lowering the speed and uping the voltage.it just does not like 2.0v and above,at any speed.
man it wound be nice it mine would take up 2.2v but sorry no go for the bartons as of now
Bowman, but did you try any mobo other then 8rda, because with this mobo the problem above 2V is not necesseraly in cpu.
Just try it, I'm getting Abit rev 1.2 and I'll soon know if I can get more the 2.025 V which is the limit with my 8RDA
btw. do you know why my computer instantly stoppes when I activate toture test in Prime95 at 1.975vcore..
and do you recommend me to change me PSU?
Current 5v at 2565mhz = 4.65
Read my posts above, this is the mobo problem. Your 5+ is on low side but if vcore is holding then it's ok, try the same with lower frequency and same vcore, and you will see that same freeze will occur in prime95. I didn't have any of those problems on older 8k3a with same cpu, psu and everything else, with much higher vcore.
Oh yeah if 5+ get very low there is a danger that your atx connecors is getting very hot and could melt, realy. Check the wires and the connector if they are too hot, if they are just warm, then it's only your psu not giving enough juice.
But with good psu lower 5+ lines mean psu will pump more current and the wires get much hoter and can eventualy melt. I now had two of those incident just because of bad connection on atx.
http://www2.arnes.si/~mlivak/burned%20atx1.jpg
http://www2.arnes.si/~mlivak/burned%20atx2.jpg
and my fixup, all voltages much better with same psu since then (btw that was with my old 8kh+ mobo)
http://www2.arnes.si/~mlivak/new%20atx.jpg
no i have only used my 8rda......time for me to take a break from spending money on my pc i think anyway.....Quote:
Originally posted by morphling1
Bowman, but did you try any mobo other then 8rda, because with this mobo the problem above 2V is not necesseraly in cpu.
Just try it, I'm getting Abit rev 1.2 and I'll soon know if I can get more the 2.025 V which is the limit with my 8RDA
on a side note good to see you again morphling1 from procooling:D
i only had problems with prime locking up when i have pushed my overclock too far.this is only time this has happened to me.now i have a truepower 550 feeding the motherboard and my 5volt never drops below 4.99v and man i have more volt mods on this board than i care to look at anymore.but mine may be a good one as far as i know.
I'm having trouble with my 8rda+ (yep it's back from the dead). I previously modded my board by removing the R678 resistor. All was fine until I got an xp3000+. At anything above 1.8v vcore in prime95 the screen will go blank. It acts just like how it used to before I removed R678. My 2500+ barton does this too, but not the 2700+ or 2400+. I do not think it's a problem with the processor - the cpu took 2v on air in another mobo (2.5ghz @ 1.9v stable). I have good mobo cooling... tweakmonsters ramsinks on the mosfets and voltage regulator with an 80mm fan right above it all. And also good power, I tried an enermax 431w and 550w.
It really seems like I'm tripping an overcurrent circuit somewhere....???
Well could be.do you think maybe by upping the voltage on the cpu we are pulling some from another area that needs it.Quote:
Originally posted by shortcircuit
I'm having trouble with my 8rda+ (yep it's back from the dead). I previously modded my board by removing the R678 resistor. All was fine until I got an xp3000+. At anything above 1.8v vcore in prime95 the screen will go blank. It acts just like how it used to before I removed R678. My 2500+ barton does this too, but not the 2700+ or 2400+. I do not think it's a problem with the processor - the cpu took 2v on air in another mobo (2.5ghz @ 1.9v stable). I have good mobo cooling... tweakmonsters ramsinks on the mosfets and voltage regulator with an 80mm fan right above it all. And also good power, I tried an enermax 431w and 550w.
It really seems like I'm tripping an overcurrent circuit somewhere....???
let me tell you guys something that has been happening to mine lately that i just didnt worrie about alot.but i noticed if i say push my r9700 core over 1.95 i get lock up.if i push my vdd over 1.95 i get lockups and not this has nothing to no with 1.95v but i am saying mayby i am on the edge of current overload myself and the slightest push will send mine over the edge to lock up.
now i tell you my radeon top core was 457mhz and i almost gave up.went got a truepower 550 and my core went to 490 max just by doing that.maybe we are dealing with a board that cannt handle the amps.i remember a old thick i used to do to the early epoxs. i would solder a wire to the mofsets from the 5volt line on the power supply and that would boost the 5vrail buy supplying a better 5v source for the mofsets....i used to have to fix posted on my old website i will look to see and show you what i mean.
I am truely looking foward to that :-)
well i found my old web page here
now this is a old mod ...at the time it was the latest.but o well i am getting older i guess.but you can see where i soldered a wire to the 5v feed for the mofsets.maybe this is a probem ?tonight if possible i will try to check the voltage at the mofsets and compair it to the output from the power supply.not sure if it is a problem but it is possible
so you are saying that this could actually give 5v and not 4.68v if I "hook" my board up this way?
I am looking forward to hear the results :-)