Page 2 of 17 FirstFirst 1234512 ... LastLast
Results 26 to 50 of 425

Thread: 7800GTX overclocks with Volt Mods??

  1. #26
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,126
    Nice, man! Good job!

  2. #27
    Xtreme Legend
    Join Date
    Dec 2004
    Location
    Sweden
    Posts
    1,185
    Wtg!

    Heared that the vcore mod requires you to remove a few SMD parts? You think there is a safer way around that?

  3. #28
    Xtreme Vmod mod
    Join Date
    Aug 2004
    Location
    Cornwall/Newcastle uni, UK
    Posts
    1,256
    Good work on the Vdd mod . Does the card need Vddq or Vref as well?

    Can someone check the voltages at pins 12, 23, 24, 26, 27 and 28. I'm looking for a voltage of about 0.8v (or alternatively the voltage which is set with the VID pins) on one of those pins, which should be the internal reference voltage for the regulator, which should be present on the feedback pin for the regulator.

  4. #29
    Xtreme Member
    Join Date
    Jan 2004
    Posts
    387
    Quote Originally Posted by symbolized?
    Very nice... well done
    Only Vcore is missing to make me completely happy - on vrzone a guy reached with a vcore mod 630 mhz on air... :-/
    That is Jason57. We have emailed a couple of time. The card did a tad over 11k on dry ice. It appears to be an exceptionally good card but there isn't enoygh data yet to know what are going to be poor, average, good and "oh my god" cards yet in the luck of the draw.

    Viper
    .
    8800 Ultra to 756x1944/1260 ViperFang-IV Water Cooled
    .
    2900XT to 992/1197 ViperFang-IV Water Cooled
    .
    8800GTX to 756x1784/1161 ViperVenom 245w TEC Cooled
    .
    7800GTX-512's to 742/2106
    .
    7800GTX-256's to 650/1620
    .
    Pictures at www.imageevent.com/marginjohn/viperjohn
    .
    Contact JohnHillig@Earthlink.net for Modding Information and Support.

  5. #30
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,126
    Here's the VDD mod done by ViperJohn. Thanx for the pics, man. 100k trimmer, lower resistance for more volts.
    Attached Images Attached Images

  6. #31
    Xtreme Enthusiast
    Join Date
    Jun 2003
    Location
    Portugal, Lisbon
    Posts
    568
    Nicely done ViperJohn, clean and very professional as always...

    Did u have time to test the mod?

    Any gains in mhz on the mem's? Any idea about the max but safe voltage to apply on memories? Depends on the cooling of course...extreme cooling will freeze the pcb of the card allowing more volts i presume!

    Is there a vcore on the way? I ask that cuzz it's obvious that there are people that already know it.

    Thks for the effort once again


    "God...i know she's dead :'( but keep her soul alive because in my heart she will never die :'(" VoRtAn_MaDgE
    Nc te eskecerei avó! :'(

  7. #32
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,126
    Quote Originally Posted by VoRtAn_MaDgE
    Is there a vcore on the way? I ask that cuzz it's obvious that there are people that already know it.
    Ppl that already know it, won't tell you or us. That's why we are here. We just gave you guys the VDD mod, now you gonna have to wait for the vGPU mod.
    You guys can help by providing the information persivore asked, if any of you have the card in hands.

  8. #33
    Xtreme Enthusiast
    Join Date
    Jun 2003
    Location
    Portugal, Lisbon
    Posts
    568
    I have the cards in my hands but i will be off the weekend (tuning show in portugal, international ) i will start digging in pdf's after that, if u need some photos of any specific area just tell me, i will try to get a digi cam to take some real close macro shots...

    edit: show me the places to measure volts
    Last edited by VoRtAn_MaDgE; 07-07-2005 at 03:05 AM.


    "God...i know she's dead :'( but keep her soul alive because in my heart she will never die :'(" VoRtAn_MaDgE
    Nc te eskecerei avó! :'(

  9. #34
    Xtreme Enthusiast
    Join Date
    Jun 2003
    Location
    Portugal, Lisbon
    Posts
    568
    For what i search already this is the multiphase controller that will allow us to change vcore, correct me if i'm wrong...



    I assume that persivore is asking about the pins values of the pic i posted above am i correct???

    This pdf is one of the most or maybe the most imcompleted pdf from this nature that i found on the web...

    I will try to arrive this night home soon to check the voltages guys!


    "God...i know she's dead :'( but keep her soul alive because in my heart she will never die :'(" VoRtAn_MaDgE
    Nc te eskecerei avó! :'(

  10. #35
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,126
    These are the points that he asked.

    Attached Images Attached Images

  11. #36
    Xtreme Enthusiast
    Join Date
    Jun 2003
    Location
    Portugal, Lisbon
    Posts
    568
    Thks for the pic Malves will help a lot...

    But in my case its very hard to check the voltages on that spot cuzz my mobo is in the case, and the mobo attached to the prommy ...

    The place is this one...sorry for the quality but just to see how hard is to measure voltage in this situation, legs of the pins are real close and like this is hard to check one without touching others



    Going try to check in other vga maybe


    "God...i know she's dead :'( but keep her soul alive because in my heart she will never die :'(" VoRtAn_MaDgE
    Nc te eskecerei avó! :'(

  12. #37
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,126
    Attach a needle with eletrical tape to the lead of your MM.

  13. #38
    Xtreme Enthusiast
    Join Date
    Jun 2003
    Location
    Portugal, Lisbon
    Posts
    568
    Needle needed , got to find one...

    btw malves, vdd measurement point is where... ???


    "God...i know she's dead :'( but keep her soul alive because in my heart she will never die :'(" VoRtAn_MaDgE
    Nc te eskecerei avó! :'(

  14. #39
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,126
    Good thing you asked. See if you can find it here...

    http://www.malvescorner.net/7800.html

    I wanna see if ppl can understand that pic.

  15. #40
    Xtreme Enthusiast
    Join Date
    Jun 2003
    Location
    Portugal, Lisbon
    Posts
    568
    vdd, pin24 - 3,52v checked...

    got to see if i can check the others, dunno where my brother put the electrical tape grrr


    "God...i know she's dead :'( but keep her soul alive because in my heart she will never die :'(" VoRtAn_MaDgE
    Nc te eskecerei avó! :'(

  16. #41
    Xtreme Enthusiast
    Join Date
    Jun 2003
    Location
    Portugal, Lisbon
    Posts
    568
    Quote Originally Posted by Malves
    Good thing you asked. See if you can find it here...

    http://www.malvescorner.net/7800.html

    I wanna see if ppl can understand that pic.
    Tha't too easy Malves ... just need to find c610, next to the label 2,09v default checked


    "God...i know she's dead :'( but keep her soul alive because in my heart she will never die :'(" VoRtAn_MaDgE
    Nc te eskecerei avó! :'(

  17. #42
    Xtreme Enthusiast
    Join Date
    Mar 2005
    Location
    NJ
    Posts
    994
    Quote Originally Posted by Malves
    Attach a needle with eletrical tape to the lead of your MM.
    Love that idea and never though of it. Had problems last time I was checking a chip upside down and on the other side of my card. Malves that is an excellant diagram you have on your site very easy to understand. I can't read mine till Tuesday so if nothing by then I'll get all the readings you need. Lettin someone borrow it for the weekend to pull off some SLI runs.


  18. #43
    Xtreme Member
    Join Date
    Jan 2004
    Posts
    387
    Quote Originally Posted by Malves
    These are the points that he asked.

    Pin 23 (V12_SEN) which is the left pin of the two pins indicated in red along the bottom side of the chip has a voltage divider

    If you follow straight down from P23 the SMR just below the automated test point pad goes to Vcore PS B+ out. The SMR marked 622 to the left goes to ground and forms the other 1/2 of the divider. I tried a Vmod at the 622 SMR already.

    I started 100k then turned down to 50K and the Vcore did not change even 1/1000 of a volt so that isn't da place. Someone can double check me on that if they want.

    The three Vdd input pins (12, 24 ans 36) look like are they are traced to each other under the chip from the ohm meter readings of zero ohms to each other.

    Viper
    Last edited by ViperJohn; 07-07-2005 at 09:15 AM.
    .
    8800 Ultra to 756x1944/1260 ViperFang-IV Water Cooled
    .
    2900XT to 992/1197 ViperFang-IV Water Cooled
    .
    8800GTX to 756x1784/1161 ViperVenom 245w TEC Cooled
    .
    7800GTX-512's to 742/2106
    .
    7800GTX-256's to 650/1620
    .
    Pictures at www.imageevent.com/marginjohn/viperjohn
    .
    Contact JohnHillig@Earthlink.net for Modding Information and Support.

  19. #44
    Xtreme Member
    Join Date
    Jan 2004
    Posts
    387
    Quote Originally Posted by VoRtAn_MaDgE
    This pdf is one of the most or maybe the most imcompleted pdf from this nature that i found on the web.
    Yeah the PDF for the ISL6592 is about as useless as it can get with only a pin out and no functional descriptions.

    Viper
    .
    8800 Ultra to 756x1944/1260 ViperFang-IV Water Cooled
    .
    2900XT to 992/1197 ViperFang-IV Water Cooled
    .
    8800GTX to 756x1784/1161 ViperVenom 245w TEC Cooled
    .
    7800GTX-512's to 742/2106
    .
    7800GTX-256's to 650/1620
    .
    Pictures at www.imageevent.com/marginjohn/viperjohn
    .
    Contact JohnHillig@Earthlink.net for Modding Information and Support.

  20. #45
    Xtreme Vmod mod
    Join Date
    Aug 2004
    Location
    Cornwall/Newcastle uni, UK
    Posts
    1,256
    check out this datasheet: http://www.intersil.com/data/fn/fn9157.pdf . It contains a reference circuit digram for the ISL6592, so it should be possible to work out a mod from that. It looks like Vsenp (pin 26) is connected as feedback, but it doesn't look like there is a resistor divider on the reference design, so a cut-trace might be needed to do the mod, depending on how closely the manufacturers have followed the design.

    Edit: It looks like there is also a possible OCP mod by connecting a VR between pin 38 (cal_cur_sen) and ground. I don't know if one will be needed tho
    Last edited by persivore; 07-07-2005 at 09:38 AM.

  21. #46
    Xtreme Member
    Join Date
    Jan 2004
    Posts
    387
    Quote Originally Posted by persivore
    check out this datasheet: http://www.intersil.com/data/fn/fn9157.pdf . It contains a reference circuit digram for the ISL6592, so it should be possible to work out a mod from that. It looks like Vsenp (pin 26) is connected as feedback, but it doesn't look like there is a resistor divider on the reference design, so a cut-trace might be needed to do the mod, depending on how closely the manufacturers have followed the design.

    Edit: It looks like there is also a possible OCP mod by connecting a VR between pin 38 (cal_cur_sen) and ground. I don't know if one will be needed tho
    Good find.

    Here are the PSENN and PSENP as built circuits on the 7800. Possibility of
    adding a 3 wire divider trimmer here.

    Viper
    Attached Images Attached Images
    Last edited by ViperJohn; 07-07-2005 at 10:55 AM.
    .
    8800 Ultra to 756x1944/1260 ViperFang-IV Water Cooled
    .
    2900XT to 992/1197 ViperFang-IV Water Cooled
    .
    8800GTX to 756x1784/1161 ViperVenom 245w TEC Cooled
    .
    7800GTX-512's to 742/2106
    .
    7800GTX-256's to 650/1620
    .
    Pictures at www.imageevent.com/marginjohn/viperjohn
    .
    Contact JohnHillig@Earthlink.net for Modding Information and Support.

  22. #47
    Xtreme Member
    Join Date
    Jan 2003
    Posts
    448
    From MickeyMouse:

    Solder a 15turn"multi turn" 250 ohm vr or 2 1k vr's in par. to these two points. "do not exceed a 500ohm vr as jumps are too great". the resistor is the circuit the solder pad is ground so feel free to use another ground instead of this tiny tiny solder pad..

    7800vcore
    http://img93.imageshack.us/img93/499/7800vgpu9nq.jpg

    7800vcore mod area and read point
    http://img36.imageshack.us/img36/4726/7800corea0kt.jpg
    - i7 5820K | Asus X99 Deluxe | 16GB Corsair Vengeance LPX | eVGA GTX 970 SC SLI | Asus PB278Q | 250GB Samsung 840 | 11TB HDD Storage | Steel Series Rival & QcK+ | Razer Orbweaver & Black Widow Ultimate '14 | Corsair RM1000W | Win 8.1 -
    - Ek Supremacy Nickel | Alphacool NexXxos UT60 360MM | Coolgate UHE 360MM | Bitspower Water Tank Z-Multi 150 | EK D5 CSQ Top | Alphacool VPP D5 | Corsair SP120 HP's | Corsair 900D | Xbox One & PS4 | Sharp Aquos Q 60" | Astro A50 -
    ~ Gone but never forgotten: Xtreme Legend - Hallowed Point - Enthusiast - Bencher - Friend ~

  23. #48
    Registered User
    Join Date
    Jun 2005
    Location
    - Germany
    Posts
    5
    What the hell - is this mod working? And where are the cutted traces and remoced smd parts? oO

  24. #49
    Xtreme Member
    Join Date
    Jan 2003
    Posts
    448
    http://service.futuremark.com/compare?2k3=4089232
    http://service.futuremark.com/compare?3dm05=987646

    The mod is from the guy that did those, idk about you but I'm not about to question it. They are legit, he wouldn't share them with me if otherwise.
    - i7 5820K | Asus X99 Deluxe | 16GB Corsair Vengeance LPX | eVGA GTX 970 SC SLI | Asus PB278Q | 250GB Samsung 840 | 11TB HDD Storage | Steel Series Rival & QcK+ | Razer Orbweaver & Black Widow Ultimate '14 | Corsair RM1000W | Win 8.1 -
    - Ek Supremacy Nickel | Alphacool NexXxos UT60 360MM | Coolgate UHE 360MM | Bitspower Water Tank Z-Multi 150 | EK D5 CSQ Top | Alphacool VPP D5 | Corsair SP120 HP's | Corsair 900D | Xbox One & PS4 | Sharp Aquos Q 60" | Astro A50 -
    ~ Gone but never forgotten: Xtreme Legend - Hallowed Point - Enthusiast - Bencher - Friend ~

  25. #50
    Xtreme Enthusiast
    Join Date
    Jun 2003
    Location
    Portugal, Lisbon
    Posts
    568
    I am working but i'm seeing that u guys have a lot of new info about this thread... got to check it better when arrive home?
    Is the vgpu working?


    "God...i know she's dead :'( but keep her soul alive because in my heart she will never die :'(" VoRtAn_MaDgE
    Nc te eskecerei avó! :'(

Page 2 of 17 FirstFirst 1234512 ... LastLast

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •