have a look at the screenshots 3oh6 posted here
RED point goes to middle pin on your VR and ground on either top or bottom
have a look at the screenshots 3oh6 posted here
RED point goes to middle pin on your VR and ground on either top or bottom
I am having a professional to do the soldering tomorrow. Is it settled that the 50K variable resistor is the one for the Vdroop mod? No matter, as I can just have the wires leading to the resistor soldered and I can solder the VR. Just wanted to know that the 50K is the one.
OK, but i dont know what is a groundpoint on my board?!? :(Quote:
Originally Posted by dinos22
Can you show me (and all in forum) in a picture a good groundpoint near the resistors for the mod???
Thanks, Navigator1
50k will definitely work...20k will likely work as well. hell, 10k is probably more than enough.Quote:
Originally Posted by Delirious.
there are dozens of grounds everywhere...just use a multimeter and check for resistance on various points with ground. for my vCORE, i used the one circled in red. its a vacant transistor pad and easy to solder to.Quote:
Originally Posted by Navigator1
http://img.photobucket.com/albums/v2...m/ground-1.jpg
just an FYI, the 790i FTW that will be coming out with will have load line calibration like the ASUS boards. I got that verified by an EVGA tech yesterday. It doesn't help me and I probably won't buy another 790i chipset before a new chipset comes along, but it should come out in the next board for those who have money to burn.
Last week I get a new XFX 790i Board
today I have to try the vdroop mod a second time
http://www.hardwarextreme.de/dave/Ha...core-droop.jpg
No problems this time, because I use other Cables
http://www.hardwarextreme.de/dave/Hardware/fullarea.jpg
http://www.hardwarextreme.de/dave/Ha.../fullarea2.jpg
Mod works realy fine! Voltage before: 2.29 kOhm
Voltage after deleting VDroop: 0.590 kOhm
Realy hard work to tune the VR to the right value
what value VR did you use? 50K is a bit high and makes for tougher adjustment, that is why i have been suggesting 20K.
also, i see you have vCORE done as well...what value VR are you using for that? TIA
didn't have 20k ...Quote:
Originally Posted by 3oh6
50kOhm for vCore works fine
yeah, neither did i, thats why i went with 50k too.Quote:
Originally Posted by Kabauterman
thanks...so 50k works fine for you huh. this whole vcore thing has me confused after zbogorgons post. not sure what is going on really.
50 K verified. I turned it down to 7 K before the mod was installed and had to turn it a couple of times to get a flatline after it was installed. I assume it's around 5-6k. 4ghz at 1.27 volts aint too bad!
good to hear. i figured a 10K or 20K would be more than enough for the Vdroop mod. thanks for confirming for others.
Hey nice one Delirious. I'm getting tempted.Quote:
50 K verified. I turned it down to 7 K before the mod was installed and had to turn it a couple of times to get a flatline after it was installed. I assume it's around 5-6k. 4ghz at 1.27 volts aint too bad!
It's just the one VR needed for the vdroop mod isn't it? I've got a bag of them ready and waiting.:D Two wires going to the resistor. What about ground?
Nice job this time Kabauterman. It was you who scared me off trying this mod.lol
RLM
No ground needed but the resistor is soooo small. I had a professional do it under a microscope so not to foul up the resistor. I am also getting 1.44 volts for 4.5 ghz.
vdroop right?Quote:
Originally Posted by Delirious.
so you only have to solder to one side?????? that's a first lol
misunderstood. Solder to each side of the resistor. Is that what you are asking?
Probably down to my dumb ass question about ground.lolQuote:
vdroop right?
so you only have to solder to one side?????? that's a first lol
RLM
i bet zborg@#^%@# had the 50K VR turned down a fair bit and was hitting OVP and now blames us for suggesting a 50K vcore turnpot :p:
Hey mates,
yesterday we had a little LN2 action
and I must say, vdroop mod realy suxx wenn y go realy cold.
We had so much problems because of the vdroop mod, we must disable this to get some scores!
I think I will sell my board because I need a board with more stable voltage for some 3D LN2 fun
After poking around for a while I am no closer to understanding the location/identity of the (assumed to be present) clock generator:confused:. I looked up half a dozen IC's, nothing though. Of course I am trying to escape the use of ntune for strap exploration as I have found it very buggy:shrug::down:.
any thoughts? :)
-serge
AFAIK the chipset has an internal clock generator
Many thanks dinos22 & 3oh6 :up:
Even a n00b to soldering like me could follow your pictures.
XFX board, 50K for vCore and vDroop. 20K for SPP.
This is as clean as I could do it. But it works great!
http://img91.imageshack.us/img91/3663/img0637pd9.jpg
lol n00b my arse
that vdroop solder i don't dare do myself eek
i'm with Dino, if you did the vDROOP, then a rookie with the irons you are not. and the mods look real good. your board should be all ready to scream now.
LOL my friend :)Quote:
Originally Posted by dinos22
If only you knew how true it is.
This is only the 4th time I've done a volt mod, 1st was a 8400GS. 2nd a P5E. 3rd 9800GX2 RIP :( (didn't die from the mods) and now this .
All in the last 3 or 4 months, before that I'd never used a soldering iron.
Though I read alot and have very steady hands.
hahah i'm same as you :rofl:Quote:
Originally Posted by Deanzo
I've got an odd one for you guys.
Since doing the mods I can't run over 1.6 volts :shrug:
Any ideas why this would be ? (if it matters I'm under LN2 doing this)
I only tested the mods at around 1.4 volts and all seemed fine.
Before I did the mods I could hit 6Ghz @ 1.96 volts one core easy http://valid.x86-secret.com/show_oc.php?id=369183 but I had real issue being SPI stable over 5714Mhz (my cpu is good for 5.9) so a vdroop mod was in order.
@ Kabauterman, what were you issues under the cold ?
Edit:
Just tried around 0c, same issue.
Though you can see the vdroop mod is working.
http://img502.imageshack.us/img502/2...coreor9.th.png
interesting
try backing off on vdroop somewhat :shrug:
quite interesting deanzo. i have been under a single stage for over a month now with the mods done and never had any issues what so ever. of course, my temps haven't gone below -40C on the CPU. i might grab some dry ice early next week to see if i can get this E8500 up past 5.3GHz so i might be able to report on slightly lower temps then.
Dean, your droop mod is overdone, increase its resistance. I saw from graphs you posted earlier that your vcore was increasing under load. There's a sense circuit tied somewhere to the vreg (can't remember where) which makes it go beserk if the voltage it receives is higher than what it thinks it should be. You have to let there be some droop, and annoyingly enough, you have to allow more the more vcore you want, since it seems to me that the board deliberately has heavy vdrop at higher vcores. The way I have it set now, 1.9v usually results in the board not powering up, but I never need that much...you will though.
Right now I've got about 1K on the dot across the vdroop resistor, IIRC that should mean that my VR is set to about 2K.
Furthermore, this actually varies board to board. Some boards let you have more aggressive vdroop mods than others, go figure.
I see,
Thanks G, I'll give that a try tonight :)
More odd stuff in Kiwi land :)
I'll do the best I can to tell you what I see.
First thing I did was to increase the resistance by one full turn, and that didn't help.
I did another full turn and the board wouldn't post, as well as every turn for the next 22.
Lower the resistance by 23/24 turns and the board would post again :shrug:
At this point I took the vDroop mod off to see what would happen..And that = No post no matter what :confused:
Then I though...(Hold on, I lowered the resistance on the vCore mod when I did it so windoz would be the same as bios) When I did that it took alot of turns before I saw anything in windows, but I didn't think anything of it as it worked in the end.
So before doing anything else I increase the resistance by lots of turns (sorry I didn't count them) when I tried to boot this time it worked.
But, I still had 1.5v set in the bios. But when I opened CPUZ it read 1.67 :shocked:
Re-booted and had a look at the read out in bios and saw the same thing!
This is very odd to me as when I had both mods on the board, I only lowered the resistance so it would be the same as set in the bios (but again this took alot of turns)
At this point I took the vCore mod off and everything was fine with the board. And the 50K VR was sitting @ 40K. The VR never went higher than 45k to start with and is still like that.
So this would mean at 40K it was setting the vcore .2v higher than bios, if you take bios drop into account (.167 in windoz)
After taking off the vDroop mod, not posting must have been OVP kicking in.
I have no idea why the vDroop mod was letting it post/boot and why the readings were not the same, but maybe one of you guys know.
But imo (and with out the vDroop) 50K VR is far to low for this XFX board.
Now if we re-call zbogorgon post, and he was using an XFX board as well.
A 200K would be the way I'd go, if I was to re-do it. But I don't have a 100 or 200K VR here to test it.
Odd Yes ? Dino, you may want to add something about this and XFX boards in your first post untill we know more.
Next up, I put the vDroop mod back on.
This time it was set to just over 9K to start with, with 1.5 set in the bios.
It booted fine and read 1.465 in windoz and 1.417 under load.
With one full turn of the VR, that went to 1.465 --> 1.424
Another full turn 1.465 --> 1.431
And another 1.471 --> 1.449 (Tested all the way to 1.87v)
And the next one gave me 1.480 --> 1.480 (this will not post/boot/work over 1.57v)
Tomorrow, I will try the pencil vdroop mod...Quote:
Originally Posted by dinos22
Will my XFX be damaged? I hope not...:D
pencil mod didn't work for me and others
maybe a waste of time
i have a warning there regarding VRs used
Hi Dino and guys , I came here looking for a vdroop mod as Im loosing 0.1v from bios to loaded in windows , it makes 1.37v loaded into 1.47 in bios . I saw above that the vdroop mod has to be tuned , is this better than LLC on asus mobos as vcore wont spike when load is reduced ?
Im going to be very careful with this qx as its too dear for me to go buy another if I nuke it .
Im also concerned that changes in bios do not seem to make any difference in windows ie you go up one or two steps in bios and windows voltage shows the same , is this common ? Or is this a part of the droop problem ?
Its priming at 4GHz 1.37v loaded , its not a very low VID model (1.275v), so Im pretty happy with that.
:up:
So dinos22, there is no pencil mod for this board, right?
EDIT: What will happen if i try this pencil mod?
Not a lot.Quote:
EDIT: What will happen if i try this pencil mod?
RLM
Like dinos22 said, pencil mod doesn't work!
RLM - is 9.29s 32m wprime good ? Thats at 4511 MHz , unlinked , untweaked , just testing .
:up:
The only solution for vdroop is soldering a 50K VR, right? It's better to forget the pencil mod...:(
Just grabbed an XFX, and measuring default vcore resistance = 44k.
So maybe Zborgon was right (for XFX board) and 50k was too low and tripped his OVP.
Im going to run the board up now on air, check some things, then perform vcore = 200k VR, vdroop = 10k VR.
Will report back later.
This is a learn as I go, kind of thing.
I changed the mods on my XFX board, so I could try other VR's more easily.
I have now tried a 200 & 100K VR, when I lower the resistance I can see the vcore raise when the VR get's to 83K.
http://img59.imageshack.us/img59/9938/img0670os3.th.jpg
i used a 50K today for droop mod
had to get it down to 1.5K to get droop easing
benched a bit but board didn't like anything more than 10x multi on a quad
later put my E8500
now i have a dead CPU and a dead board so go figure :(
Deanzo, whats your default resistance to ground on that XFX?
Sh*t man, bad luck. Is that your second 790i?Quote:
now i have a dead CPU and a dead board so go figure
RLM
Perfectly works vDroop Mod.
Was 2.3k all over again after vDroop became 1.99k.
I am happy
http://keep4u.ru/imgs/s/080709/55/55...4b2454613a.jpg
first one is aliveQuote:
Originally Posted by RLM
it ended up being a PSU problem
but replacement board that i put a vdroop mod on is definitely dead as a door nail
Anyone in the US willing to do Vdrop & Vdroop for me? Drop me a PM if you would be interested.
call someone locally to do it professionally. Someone who does work under a microscope to make sure it can be done right and not mess up the resistor.
50K resistors can be found cheap at frys.
I've looked locally, but have not had any luck. Was hoping one of the experienced people here would be willing to do it for the price of the parts and their time. I have zero soldering skills, or equipment.
No fry's in North Alababma, only BBQ stands and a bazillion mexican restaurants. :yepp:
I might see what the 790i FTW would come out as in price. It will have the vdroop correction in the bios. I could sell you mine and keep it registed for you in case anything went wrong. just thought I'd throw it out.
sorry to dig this up out of the dead zone.... does anyone know if the SPP mod will work with 790i FTW digital board?
Same here, sorry to dig it out but anyone can confirm if these mods are working?
ive used vcore/vnb/vdroop successfully
Vdroop mod works on the ultra and reference using the variable resistor. Pencil mod does not work on the 790i series. Use a variable resistor. 10 ohm, I believe.