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post #81 of 1336
Thread Starter 
wow i'm impressed specially with those clocks under 1.4v, you could probably run that baby with stock cooling and get near the same clocks with that voltage although I wouldnt suggest it because that card should be cherished!

1.1ghz on a G92 should get you front page on HWbot IMO, plus a clean sweep of the 8800GS would probably get you over 120 hwbot points and legend status on OCN. How hot does the mofset get during those runs and what do you do to keep it cool?

That's odd that the OVP kicks in so early the 8800GTS I just killed ran smoothly at 1.44 without a hitch, too bad I killed the memory, that legs on the Memory IC are a pain to solder to. Every time I soldered and put hot glue on it the glue application disconnected the solderpoint *shakes fist*

Pizza: keep us posted with you adventure wi\h the 9600GT I'd like to see how well it turns out for you before I go down the capping road myself. And CL3 save up for the I9 because you shouldn't have a problem with a few hardware cups once you get everything going.
post #82 of 1336
Man you guys are awesome. You have me wanting to Vmod everything
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post #83 of 1336
Thread Starter 
what do you guys think, this is probably the easiest volt mod I have ever seen:

http://www.xtremesystems.org/forums/...d.php?t=231790

I'm a little scared for fear that if this card is bricked then I am the ultimate a**hole but if it succeeds then I can expect a decent amount of hwbot points. I'd assume I'd need a waterblock to get reall decent clocks out of it but I bet I could get another .1 .2 volts about on air maybe with some extra TIM

anyone hear or anyone trying this and having it work? I was thinking if I do indeed do it I'll just do it a week before I go to basic training that way if I fail then I don't have to live with the pain too long and I can always buy a new one after. Also what are the chances if I brick it and manage to solder the SMR back on all nice looking that EVGA will accept the RMA?
post #84 of 1336
@ pizza: Inductors..are just coils of wire wrapped tightly around a magnet. In short...they help slow down current spikes..otherwise known as 'in-rush'. Adding inductance to the circuit may be necessary to buffer the higher vcore. Capacitance requires Inductance to work properly..so if you have hit you limit with caps..and the GPU can still handle more..then inductors or coils may do the trick.

For the coil mod..you can attach inductors anywhere you can add a capacitor.. On your 9600GT..it may help you skirt around that OCP issue you have been hitting at high vcores. While it wont raise the actual limit of OCP..it will buffer the fluctuations in current a lot more and keep it from tripping prematurely.


@ tha d0ctor: Thanks..Im gonna keep pushing
post #85 of 1336
Quote:
Originally Posted by tha d0ctor View Post
what do you guys think, this is probably the easiest volt mod I have ever seen:

http://www.xtremesystems.org/forums/...d.php?t=231790

I'm a little scared for fear that if this card is bricked then I am the ultimate a**hole but if it succeeds then I can expect a decent amount of hwbot points. I'd assume I'd need a waterblock to get reall decent clocks out of it but I bet I could get another .1 .2 volts about on air maybe with some extra TIM

anyone hear or anyone trying this and having it work? I was thinking if I do indeed do it I'll just do it a week before I go to basic training that way if I fail then I don't have to live with the pain too long and I can always buy a new one after. Also what are the chances if I brick it and manage to solder the SMR back on all nice looking that EVGA will accept the RMA?
Sadly, the reward is not worth it. You are already temperature limited with your currant voltage. Its all about the shader temps. See how high you can get your shaders. 1/2 that is your max core Mhz. Adding voltage makes the problem worse. Lower temp=higher shader clock
    
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post #86 of 1336
Quote:
Originally Posted by CL3P20 View Post
For the coil mod..you can attach inductors anywhere you can add a capacitor..
Very nice explanation but u mean u can solder an inductor-coil in parallel with a cap??(since caps are where u add MORE caps...)
Isnt it supposed to put caps first then the coils AFTER?
    
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post #87 of 1336
On the PCB the order goes as follows:

Input 12v-> 16v caps-> Mosfets-> Inductors-> 2.5-4v output caps

Some PCB's have inductors between the 16v caps and the mosfets too..just depends. But yes, you can add a inductor in parallel with any capacitor..but to do the job effectively, you would want to add it in the 'front' of the voltage supply...or before the mosfets.

You were partially right..on the input side there are caps..and then inductors..but the output side is just the opposite.
post #88 of 1336
CL, tell me what you think about this.

Red = 2.5v or 6.3v caps
Green = 1R0 inductors
Yellow = 16v caps

I've mark a place on the front and back where I was thinking of adding a 16v cap what are your thoughts and how does this action plan look?

    
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post #89 of 1336
Here is my latest victim, 8600 gts. Did the vmem measure points (didn't have any more connectors for vgpu measure) & checked stock V, did the vmem mod & checked that, from 2.1V stock to 2.165 with the VR at max resistance.
Added some secondary caps & checked it out, all good.
Did the 'basic' vgpu mod for this card, connecting 2 points at 2 spots with a little piece of resistor lead, supposed to get it from 1.365V stock to 1.5V. New vgpu was 1.465.

Did a quick vantage run at stock clocks, all was well. Upped the clocks to a bit beyond where I could get it stock & let it rip. The first graphics test ran fine, during the second the monitor went all dim, then black, then blue screen (nv-something error, video related).
Turned the mem back to 2.165 (lowest) but everytime windows loads same crash before the desktop is up, so I took off the caps & try it. No go. Remove the vgpu mod & got back into windows.
But the vgpu wasn't the problem, it's the mem mod Even at stock mem clocks if I raise the Vmem from 2.165 to 2.175 I get the same black screen then blue screen. (caps & vgpu mod are removed)

Any ideas?

    
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post #90 of 1336
@ Pizza-> Looks solid! You should measure max clocks for mem and core though before hand...and dont change the voltages until you run the GPU after you planned install. Then check for max clocks again at current voltages before upping them further. Nice work btw..thats gonna get you somewhere for sure! Cant wait to see how it turns out.


@ Ftw420-> Is that just a 256mb card..? I mean, it doesnt have more 512mb or 1gb of mem does it..? If its just 256mb.. ..you can start by measuring vMEM at the back of each mem IC..check for consistency between them all. There is another cap position to use for vMEM on the PCB..if you cant get anywhere troubleshooting it..I would either:

1: add second cap for vmem
2: swap the cap on the mem circuit out with another
3: swap positions of the cap to the currently empty position available for vmem

..that make any sense to you..?
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