Results 1 to 16 of 16

Thread: R9800P Sapphire black PCB vmods help, please...

  1. 02-11-2004, 03:15 PM #1
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734

    R9800P Sapphire black PCB vmods help, please...

    hi to all modders,

    let me get straight to the point...

    so i have this R9800P from Sapphire... 9700-style black PCB OEM Sapphire's own design (not ATI OEM Sapphire) with Samsung 2.86ns memory rated at 350mhz and capable of 400mhz.
    i finnaly took zalman heatsink off this thing to prepare it for mods...



    unfortunately, as us see, it has different layout...

    can u guys help me with modding this thing and finding vagp a vmem checkpoints...

    i have some close-up pics here:

    left side, middle, right side

    under quite loud air-cooling with delta 80mm this board does 450core/400mem with absolute minimum of artifacts but i would like to make it work a bit harder

    any help would be greatly appreciated

    EDIT: I know i can solder wire to pin20 as ground and then pin18 to trimmer (for vagp) and pin5 and pin7 respectively (for vmem) but i would rather avoid that as my hands are shaky and i'm not a soldering-pro...
    Last edited by bachus_anonym; 02-11-2004 at 03:21 PM.
    Reply With Quote Reply With Quote
  2. 02-11-2004, 06:57 PM #2
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734
    oh man, that sucks...
    i just started tracing in search of vgpu and vmem alternate soldering points.
    good news is that vmem seems to be the same as on reference board...
    bad news that vgpu seems to disappear under that stupid heatspreader with sticker or whatever that is! i wonder if i can remove it safely...

    but still looking for voltage checkpoints... guys, please, help me out here...
    Last edited by bachus_anonym; 02-11-2004 at 07:04 PM.
    Reply With Quote Reply With Quote
  3. 02-11-2004, 11:25 PM #3
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734
    i think i got it figured out..
    too bad that alternate vagp soldering point definetely sits under that aluminium plate/heatsink.

    ok, went thru all exposed caps' legs on the board and measured voltages...


    here's what i got for voltage checkpoints



    it looks like default vagp is 1.71v. three caps show same voltage. is fan ground good idea?
    also it seems like vmem checkpoint (2.80v) is also here.

    and here's on vmem side...



    i assume that 1.397v is vref since it's exactly half the vmem, right?


    i guess i'll be preparing for some soldering very soon...

    see ya guys later...
    Reply With Quote Reply With Quote
  4. 02-12-2004, 06:21 AM #4
    Bra!nFreeZe^
    Bra!nFreeZe^ is offline
    Xtreme Member
    Join Date
    Jul 2003
    Location
    Denmark Frederikshavn
    Posts
    462
    Send a message via ICQ to Bra!nFreeZe^
    Nice work d00d ! I will be waiting eager to see how high you can clock this card!
    -=Back In Business=-
    Reply With Quote Reply With Quote
  5. 02-12-2004, 06:51 AM #5
    Stang_Man
    Stang_Man is offline
    Xtreme Addict
    Join Date
    Dec 2002
    Location
    Tempe, AZ
    Posts
    1,263
    Send a message via AIM to Stang_Man
    that vmem spot, the solder pad. the pad all the way to the left of the 4 in a row, that can be used as ground too.
    NF7 | Mobile 2400+ | 256MB Twinmos PC3200 BH5 | 9800 PRO | 23384 6989

    MY HEATWARE
    Reply With Quote Reply With Quote
  6. 02-12-2004, 11:00 AM #6
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734
    Originally posted by Stang_Man
    that vmem spot, the solder pad. the pad all the way to the left of the 4 in a row, that can be used as ground too.
    ok, i'm done so far...

    vgpu



    vmem



    unfortunately, other ground points thatm pin on those chips didn't work? anybody knows why?
    fan header at vgpu with VR maxed out on resistance gave me 1.38v... decreasing resistance gave me decreasing clock speed... and eventually not been able to boot to windows at 1.06v

    weird thing is that vmem checkpopint shows always 2.80v no matter how i turn the trimmer (need help here please) but after i decrease resistance (about 6 turns) screen gets corrupted and icons dissapear.. so seems like i raised voltage...


    FIRST impression with vmem VR maxed out and vagp at 1.75v i need to clock down my memory to get rid of artifacts.... i'll get some more testing there...
    Reply With Quote Reply With Quote
  7. 02-12-2004, 11:25 AM #7
    Malves
    Malves is offline
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,045
    That check point you read 2.80v is not the VDD (mem), that's VDDQ.
    Reply With Quote Reply With Quote
  8. 02-12-2004, 11:28 AM #8
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734
    Originally posted by Malves
    That check point you read 2.80v is not the VDD (mem), that's VDDQ.
    yeah, i know there's something wrong here.... could you tell me where this vdd checkpoint is.... i raise vdd to get rid of artifacts but don't know how high it is...
    Reply With Quote Reply With Quote
  9. 02-12-2004, 11:31 AM #9
    Malves
    Malves is offline
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,045
    that point you read 3.335v. That's the one for VDD.
    Reply With Quote Reply With Quote
  10. 02-12-2004, 11:40 AM #10
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734
    Originally posted by Malves
    that point you read 3.335v. That's the one for VDD.
    wow... so this thing was doing 3.35v stock??? damn, no wonder it went to almost 390mhz artifact-free when i got it... so this checkpoint reads 3.70v now...

    unfortunately i can't go back to my previous mem clock of... even at 3.7v i need to lower to 350 to have no artifacts... how to fix this thing... ? if i remove vdd mod would that work ?
    Reply With Quote Reply With Quote
  11. 02-12-2004, 11:54 AM #11
    Malves
    Malves is offline
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,045
    Well, you may try the vddq mod. That should help you mem clock. You'll have to remove the plate from the back of the card to get ot the chip for the vddq mod. Be very careful when removing that - see pic below why.

    The area highlited in the pic is the chip for the mod. solder pin 1 (look for the mark on the chip - the small hole) to pin 4 via 50k trimmer. Lower resistance for more volts. You have 2.8v now, you may try 3v.

    Reply With Quote Reply With Quote
  12. 02-12-2004, 12:03 PM #12
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734
    oh man, that sucks coz i have those trimmers glued to it (well to electric tape so i got lucky here) and wires are very short... is that gonna help, have u tried it and succeed ?
    Reply With Quote Reply With Quote
  13. 02-12-2004, 12:09 PM #13
    Malves
    Malves is offline
    Xtreme X.I.P.
    Join Date
    Nov 2003
    Location
    Keller, TX
    Posts
    1,045
    I haven't tried it yet, you see why. I'm just waiting for the new chip to get here, then I'll do it. I am modding the whole thing: vGPU, VDD, Vddq, Vref.
    Reply With Quote Reply With Quote
  14. 02-12-2004, 12:14 PM #14
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734
    oh, i remember that post... your chip came of with the plate. i know it's glued on two chips... i'll try that anyways... i'm off today so plenty of time to experiment...
    Reply With Quote Reply With Quote
  15. 02-14-2004, 07:43 PM #15
    LikwidKool
    LikwidKool is offline
    Xtreme Enthusiast
    Join Date
    Dec 2002
    Location
    Jersey City, NJ USA
    Posts
    995
    Send a message via ICQ to LikwidKool Send a message via AIM to LikwidKool
    also one thing I have learned is when you mod your vgpu the extra heat also heats up the ram, and will lower your ram clocks. That is probably why you had to lower your ram clocks to get rid of artifacts.

    Also I can't believe that ram is at 3.3V stock! On a BBAti 9800pro the ram is at 2.68v That is just incredible.

    Just be careful though. Going to high on the ram is one of the biggest killers of cards.
    | MSI K8N Diamond Plus | WaterCooled A64X2 4200+ | 2x1024 PC4000 EB Plat | 2x BFG 7800GT | Maxtor DMax 10 SATA 250gb 16mb cache & 200gb 8 mb cache| OCZ 700watt GamerXtreme PSU | Plextor 716SA DL DVDRW


    HeatWare
    Reply With Quote Reply With Quote
  16. 02-15-2004, 03:48 AM #16
    bachus_anonym
    bachus_anonym is offline
    Xtreme X.I.P.
    Join Date
    Dec 2003
    Posts
    4,734
    what i was thinking that maybe vddq is gonna help... i'll give it a go next week and see what happens...
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

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
  •  

Forum Rules