7900GT over voltage protection?

I did the 1.5 vmod and my core, for now, is up to 670 (not that great, people been getting 690 on 1.4) but anyway...idle is 40 now and load is mid/high 60's (so a rise of 3-4 degrees from stock voltage with vf700cu), a little warm but okay. I'm gonna pick up some more heatsinks for the two IC's mentioned, ram heatsinks will do? and im also going to mount a fan near the video card before i do the vmem pencil mod. I got an MM so i can measure voltage and resistance to make sure im getting 2.2 volts to the mem and not something like 2.1 or 2.4 :eek:

I ran that tool, dont know the name off the top of my head, has a weird name like rthblh or something LOL..ran it over night and came back the next morning..spheres still moving smoothly and didnt notice anything like artifacts, unless im blind but that could be. lol

thanks guys..

Yes, I just stuck some extra ram sinks that I had lying around on them. Works fine :)

I have done Vmod V1.5 for Vcore now and i want to do the memory Vmod using a pencil. now i have a question about this:
how did you measure the Voltage about the memory, i have read the thread on VrZone. there is one point about the memory on the card can be used to measure the voltage, but where is the other? could you tell me about it this? otherwise, should i measure the voltage when the card is runing? i find it's diffculte in my case, or need i take my motherboard out of my case and do this? i am using a water cooling for CUP, GUP & motherboard, it's really tired me.:( Thank you.

Yes, you will need to measure the voltages when the card is running.

The second "point" that you measure is any ground. For example, the screw that retains the card in the PCI-E slot (I usually use this because its easy to get to). There are some grounds on card as well.

Yeah whe ni measured the vgpu i just touched any metal part of my case for the ground..worked fine..MM read 1.498/499 volts...right where its suppose to be for the 1.5 volt mod....I'm gonna stick some ram sinks on thoseIC's and buy a fan PCI slow cooler that will help active cool the whole front side of the card :) Let you know!

Codeman05 and iRoNeTiK, thank you very much! there is a bit trouble with me to measure the voltage when the card is runing in case, but i think i will try to get them all out of my case and do this mod at this weekend. no doubt that i have been deeply tempted by her.
i also want to get a fan installed on PCI slot to cool it.

Ps: i have killed one motherboard because the ram sinks i added on those IC fallen down and made the moterboard shorted. you need to be more careful when you do this.

Quote:

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Originally Posted by jVIDIA

taotao0210, what coolbits do you use that gives you access in the memory slide to > 900 ?!

Can anyone please tell me were to get one coolbits like that !?



:nono:

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jVIDIA,

attachment is the coolbits i am using now.:slap:

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Originally Posted by turbo

For the vf700 do you use the slightly offset mounting holes on the card or the main ones with the silver circle around them?

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I tried both holes.
Seems the slightly offset holes gave me better cooling than standard one.

Quote:

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Originally Posted by taotao0210

There is a bit trouble with me to measure the voltage when the card is runing in case, but i think i will try to get them all out of my case and do this mod at this weekend. no doubt that i have been deeply tempted by her.

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Solder a small cable to the measure point, a Molex connector like seen in a few pictures here is a good choice... This way you can place it somewhere more easily accessible and also do not risk shorting anything out with the multimeter...

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Originally Posted by taotao0210

jVIDIA,

attachment is the coolbits i am using now.:slap:

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I am not aware of any different "versions" of coolbits. All coolbits does is change regestry keys to allow overclocking with the built in NVIDIA overclocking tools. Coolbits gets its range on the slider bars from the stock clocks in the bios. Its a certain percentage over whatever clocks are in the bios. Different "versions" of coolbits won't change that, unless someone changed the registry key entries to something that allowed higher clocks.

This is why you see some people with higher slider bars than others. Vanilla 7900GT goes so high, 7900GT CO goes higher, and the 7900GT Superclock cards go even higher. Its because the stock clocks are higher.

If you want higher slider bars with coolbits, just change the clocks in the bios, its as simple as that. If you don't feel comfortable pulling the bios from the card, changing it, and flashing it back, then probably another overclocking utility would be best. Maybe rivatuner will come out with something new soon.


Marlon

Quote:

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Originally Posted by Per Hansson

Solder a small cable to the measure point, a Molex connector like seen in a few pictures here is a good choice... This way you can place it somewhere more easily accessible and also do not risk shorting anything out with the multimeter...

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That's a good suggestion. i will try it this weekend. thank you! :toast:

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Originally Posted by snakeskinner

I am not aware of any different "versions" of coolbits. All coolbits does is change regestry keys to allow overclocking with the built in NVIDIA overclocking tools. Coolbits gets its range on the slider bars from the stock clocks in the bios. Its a certain percentage over whatever clocks are in the bios. Different "versions" of coolbits won't change that, unless someone changed the registry key entries to something that allowed higher clocks.

This is why you see some people with higher slider bars than others. Vanilla 7900GT goes so high, 7900GT CO goes higher, and the 7900GT Superclock cards go even higher. Its because the stock clocks are higher.

If you want higher slider bars with coolbits, just change the clocks in the bios, its as simple as that. If you don't feel comfortable pulling the bios from the card, changing it, and flashing it back, then probably another overclocking utility would be best. Maybe rivatuner will come out with something new soon.


Marlon

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Yes, Marlon. i think you are right. i post the coolbits i am using because jVIDIA asked me about it. :)

taotao, thanks.

this is the mod. of my galaxy 7900gt :banana: :banana:

liquid cooling by ybris k5 core 740mhz ram 1100mhz pentium D805 4200mhz :D

core 1,55volt ram 2,30volt

http://download.pctuner.net/upload/r...40_1100_03.JPG

what do you guys think is the best aftermarket cooler for the 7900 gt's?

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Originally Posted by loser7787

what do you guys think is the best aftermarket cooler for the 7900 gt's?

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Zalman VF900Cu, because the hole layout has been moved 18.5mm closer to the PCI bracket on the 7900GT compared to the 7800GT(X) and 7900GTX no Arctic Cooling coolers for the mentioned cards will fit...

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Originally Posted by bubu..

this is the mod. of my galaxy 7900gt :banana: :banana:

liquid cooling by ybris k5 core 740mhz ram 1100mhz pentium D805 4200mhz :D

core 1,55volt ram 2,30volt

http://download.pctuner.net/upload/r...40_1100_03.JPG

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AWESOME MEM CLOCK! :eek:

Richteralan
What idle temps and for what ambient temp are your getting with the 700cu. Mine are 48 degrees on idle with 20 degree ambient, 1.4 mod. May need to try a refit.

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Originally Posted by bubu..

this is the mod. of my galaxy 7900gt :banana: :banana:

liquid cooling by ybris k5 core 740mhz ram 1100mhz pentium D805 4200mhz :D

core 1,55volt ram 2,30volt

http://download.pctuner.net/upload/r...40_1100_03.JPG

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Oh, i just to say you got a great card! gratulations! :clap:

Problem.....When I load BF2..it loads past sounds and starts getting into animation system/collisions (people who play BF2 know what im talking about) and then my screen goes whack! like all these slanting lines everywhere refreshing real fast or weird colors etc, hard to describe..and i cant get back to desktop with alt tab or ctrl alt del as well. I know it's my OC, since I put no OC in coolbits and then it doesnt do it. I have the 1.5vold mod and I was @ 670 core but it still does it @ 650/625/600 ...doesnt do it @ 500 (stock) or 535 so far so whats the deal? I guess i got a :banana::banana::banana::banana:ty card to OC LOL! Temps are fine...38-41 idle depending on time of day of course. It does it when it switches to 3d it seems (obviously) Any ideas? could it be overvoltage protection? or IC'S getting too hot? I got the 700-cu on it with a side case fan on it as well. Tomorrow I should be getting a Vantec PCI Card Fan board, just has two 70mm fans that stick in expansion slot, covers and blows over the whole front side of the board to keep everything actively cool and improve case airflow, which i think is alrdy decent. I did the 1.5mod with the conductive pen and im getting 1.499 volts to my card so i know it was successful. so :( blah

please try the 'switching frequency' pencil mod described in the second post of the vmod sticky and see if that helps.
basically pencil the resistor down to 45kohm. (just make sure you're getting the same initial reading. switching the red/black probes around yields different results for me)
you should see a vast improvement in the stable OC settings.

Quote:

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Originally Posted by flytek

please try the 'switching frequency' pencil mod described in the second post of the vmod sticky and see if that helps.
basically pencil the resistor down to 45kohm. (just make sure you're getting the same initial reading. switching the red/black probes around yields different results for me)
you should see a vast improvement in the stable OC settings.

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You could eventually do this mod by pencil, try to get the value down to approx. 45Kohm.


yah it says the guy couldnt run above 545 on commanche demo..blank screen..

so this is the line "You could eventually do this mod by pencil, try to get the value down to approx. 45Kohm." the resitor labeled "k" in the picture.so switching frequency..so its switching from 2d to 3d and there isnt enough juice?

i've done this mod with a pencil and it did help.
if you do it please indicate what improvements you get.

my feeling is that as indicated it basically feeds more juice to the core in some way.
so some 3d work is obviously more demanding than say 3dmark and does require this mod.
i don't understand the full reason for it but it does help imo

okay ill try it tomorrow. I think my whole board temp will go down with my addition of my PCI fan card, which will help greatly IMO. Yes ill let you know :D ill let everyone know! ah time for bed im going crazy with this mod stuff!

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Originally Posted by alpha0ne

After doing the simple 1.4V mod I have found that two IC's get VERY hot when under load so small HS may be needed. just my opinion :)

http://i16.photobucket.com/albums/b2...0ne/HotICs.jpg

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http://i63.photobucket.com/albums/h1...or1111/wtf.jpg