Page 15 of 40 FirstFirst ... 51213141516171825 ... LastLast
Results 351 to 375 of 997

Thread: ATI 3850/3870 Voltmod thread

  1. #351
    Registered User
    Join Date
    Nov 2007
    Posts
    24
    Quote Originally Posted by GenTarkin View Post
    I did the old mod as well....penciling it was much easier, those solder points on new mod would just not connect for me...

    I penciled it to like 1.249 ohms...Im not sure what vgpu that puts me at...

    does anyone know of any measure points for voltage really close to the edge of the board on the side, cuz my vid card is very hard to measure since my cpu heatsink is so huge!...leaves me no room to put probes halfway in middle of card...
    on the 3850 the measure point isnt in the middle it is here:
    Last edited by Cha0s; 01-11-2008 at 07:42 AM.
    MÖP!!!

  2. #352
    Xtreme Enthusiast
    Join Date
    Apr 2003
    Posts
    505
    sweet! and those are on the outer side of the board right? the side furthest away from motherboard?
    Also what about those 2 beneath those points...are those just negatives and not positives like the ones you highlighted?

    Or could I measure from those bottom 2 also?

  3. #353
    Registered User
    Join Date
    Feb 2004
    Posts
    349
    Does the 3870 have OVP or OCP like the 8800's?

    If not, and all that is required to get high clocks is an unlocked BIOS and a vCore mod, I think I might save a few pennies and get a 3870 instead.

    :: 3DMark01=66,732 :: 03=71,879 :: 05=26,413 :: 06=18,772 ::

  4. #354
    Xtreme Addict
    Join Date
    Apr 2003
    Location
    Denmark
    Posts
    1,015
    I dont think so i have had mine vgpu on 1.920volt on a mistake with no problem it can do a full 3dmark06 at 1.850volt and it is not getting hotter than 55c on my water
    The man with the littel Barebone!
    And proud Crew of!!!
    Octeamdenmark.com
    Shuttle SX38P2Pro Barebone E8600cpu and HD4870X2 gfx and 2gig Crusial Ballistix PC8500 Cl5 and 2x150gig Raptor in raid 0 and 1x750 gig seagate
    Msi 790FX-GD70 Mobo Amd 955-965 PHII cpus and 2gig Crucial value PC10600@800mhz 7-5-5-15 1T
    And 4x500GB Seagate 7200.12 in raid0
    4xHD5770 in CFQ.
    [SIGPIC][/SIGPIC]

  5. #355
    Registered User
    Join Date
    Nov 2007
    Posts
    24
    Quote Originally Posted by GenTarkin View Post
    sweet! and those are on the outer side of the board right? the side furthest away from motherboard?
    Also what about those 2 beneath those points...are those just negatives and not positives like the ones you highlighted?

    Or could I measure from those bottom 2 also?
    u should try it.. this picture isnt mine,.. i just copied it for showing you
    MÖP!!!

  6. #356
    Registered User
    Join Date
    Nov 2007
    Posts
    24
    Quote Originally Posted by Jimbo Mahoney View Post
    Does the 3870 have OVP or OCP like the 8800's?

    If not, and all that is required to get high clocks is an unlocked BIOS and a vCore mod, I think I might save a few pennies and get a 3870 instead.
    OVP or OCP ? sry my english isnt as well...
    german school-english

    what do you mean? ,.
    MÖP!!!

  7. #357
    Registered User
    Join Date
    Feb 2004
    Posts
    349
    OVP = over volt protection

    OCP = over current protection

    :: 3DMark01=66,732 :: 03=71,879 :: 05=26,413 :: 06=18,772 ::

  8. #358
    Xtreme Enthusiast
    Join Date
    Jun 2006
    Location
    COLORADOOOOO
    Posts
    541
    Quote Originally Posted by GenTarkin View Post
    sweet! and those are on the outer side of the board right? the side furthest away from motherboard?
    Also what about those 2 beneath those points...are those just negatives and not positives like the ones you highlighted?

    Or could I measure from those bottom 2 also?
    thats my pic. its the ones close to the mobo. yes thats the positive side. it wont read correctly form negative. if you dont like that then you can read the volts from...

  9. #359
    Registered User
    Join Date
    Feb 2004
    Posts
    349
    Another question:

    In the opening post, one image shows 100k for Vcore, the other shows 500k.

    Which is correct / ideal? Is the second one a typo of 50k?

    :: 3DMark01=66,732 :: 03=71,879 :: 05=26,413 :: 06=18,772 ::

  10. #360
    Xtreme Guru
    Join Date
    Jan 2005
    Location
    Tre, Suomi Finland
    Posts
    3,858
    It's not a typo.
    But 100kΩ pot works much better than a 500kΩ one.

    edit:
    Here's a revised pic for alternative vGPU mod points:
    Click image for larger version. 

Name:	HD3870_vGPU_mod_small.jpg 
Views:	1977 
Size:	106.7 KB 
ID:	70538
    Last edited by largon; 01-12-2008 at 12:34 PM.
    You were not supposed to see this.

  11. #361
    Xtreme Enthusiast
    Join Date
    Jun 2007
    Location
    Athens
    Posts
    558
    one 100kΩ Vr is fine and easy tunable
    500kΩ should be fine too but it will give you crap Voltage control

    I have one question the mod's are the same for both cards ? 2850 and 3870 needs the same Vr's and we solder them at the same points ?
    i'am waiting 2x3870 for Vmod :p
    Last edited by Vatos_locos; 01-12-2008 at 01:29 PM.
    CPU : Q9550 / Board : Asus P5E64 WS Evolution / Ram : 2x1 OCZ D9GTR DDR3 / Vga : HD 4870 / PSU : PPC&C 750W / SSD Ocz Vertex 30Gb / All under Water & Tec's
    Overclockers Wannabe Athens Dept...

  12. #362
    Xtreme Member
    Join Date
    May 2004
    Location
    Finland
    Posts
    270
    Hi modded one of my 3870's powercolor pcs... and well gpu runs 3dmark06 with 1.48vgpu but mems cannot go over 1170mhz and mem default voltage is 1.98v :O should i try to raise or decrease? quite high voltage for gddr4 thought

    btw hynix 0.8ns chips
    A64 2800@ 9x279 # Abit kv8pro 3rd EYE (vtt and vmem modded) # 2x256 mb TwinMos memory( with old winbond ch-5 max:240@3.5v) # 2x256mb KHX 3000 memory (with old winbond bh-5 max:270@3.7v)
    9600 Pro LE with vgpu mod
    Good Job!

  13. #363
    Registered User
    Join Date
    Aug 2007
    Location
    Norway, Stavanger
    Posts
    61
    Could you post a picture of the mod KeZzZu? Got the same card so I'm interested in seeing how you did it

  14. #364
    Xtreme Member
    Join Date
    May 2004
    Location
    Finland
    Posts
    270
    Quote Originally Posted by heanwi View Post
    Could you post a picture of the mod KeZzZu? Got the same card so I'm interested in seeing how you did it
    sure in two hours. how fast your mems are going btw.. mine cant hit even 1200 mhz
    A64 2800@ 9x279 # Abit kv8pro 3rd EYE (vtt and vmem modded) # 2x256 mb TwinMos memory( with old winbond ch-5 max:240@3.5v) # 2x256mb KHX 3000 memory (with old winbond bh-5 max:270@3.7v)
    9600 Pro LE with vgpu mod
    Good Job!

  15. #365
    Registered User
    Join Date
    Aug 2007
    Location
    Norway, Stavanger
    Posts
    61
    Quote Originally Posted by KeZzZu View Post
    sure in two hours. how fast your mems are going btw.. mine cant hit even 1200 mhz
    Currently at 1240MHz, but I have prioritized core clock so I haven't found a max mem clock (yet).

  16. #366
    Xtreme Addict
    Join Date
    Apr 2003
    Location
    Denmark
    Posts
    1,015
    Here is my Sapphire HD3870 fully modded.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	P.JPG 
Views:	1868 
Size:	148.3 KB 
ID:	70582   Click image for larger version. 

Name:	P1.JPG 
Views:	1863 
Size:	142.1 KB 
ID:	70583   Click image for larger version. 

Name:	P2.JPG 
Views:	1853 
Size:	142.5 KB 
ID:	70584   Click image for larger version. 

Name:	P3.JPG 
Views:	1844 
Size:	79.9 KB 
ID:	70585  
    The man with the littel Barebone!
    And proud Crew of!!!
    Octeamdenmark.com
    Shuttle SX38P2Pro Barebone E8600cpu and HD4870X2 gfx and 2gig Crusial Ballistix PC8500 Cl5 and 2x150gig Raptor in raid 0 and 1x750 gig seagate
    Msi 790FX-GD70 Mobo Amd 955-965 PHII cpus and 2gig Crucial value PC10600@800mhz 7-5-5-15 1T
    And 4x500GB Seagate 7200.12 in raid0
    4xHD5770 in CFQ.
    [SIGPIC][/SIGPIC]

  17. #367
    Xtreme Member
    Join Date
    May 2004
    Location
    Finland
    Posts
    270
    Anyone else having issue to hit 1200mhz with 3870? mine has stock vmem 2v and mems are clearly overheating. 30 secs atitool and errors start to appearing, mems are hynix chips. cooling is crappy alu plate which i sanded clear and added thermal paste. gonna make good copper plate to cool them

    ps: uploading mod pic asap
    A64 2800@ 9x279 # Abit kv8pro 3rd EYE (vtt and vmem modded) # 2x256 mb TwinMos memory( with old winbond ch-5 max:240@3.5v) # 2x256mb KHX 3000 memory (with old winbond bh-5 max:270@3.7v)
    9600 Pro LE with vgpu mod
    Good Job!

  18. #368
    Xtreme Addict
    Join Date
    Apr 2003
    Location
    Denmark
    Posts
    1,015
    Mine is 1.897v stock and hits 1331 fully playble for hours but cn do 1377 bench
    The man with the littel Barebone!
    And proud Crew of!!!
    Octeamdenmark.com
    Shuttle SX38P2Pro Barebone E8600cpu and HD4870X2 gfx and 2gig Crusial Ballistix PC8500 Cl5 and 2x150gig Raptor in raid 0 and 1x750 gig seagate
    Msi 790FX-GD70 Mobo Amd 955-965 PHII cpus and 2gig Crucial value PC10600@800mhz 7-5-5-15 1T
    And 4x500GB Seagate 7200.12 in raid0
    4xHD5770 in CFQ.
    [SIGPIC][/SIGPIC]

  19. #369
    Xtreme Member
    Join Date
    May 2004
    Location
    Finland
    Posts
    270
    Quote Originally Posted by Riska View Post
    Mine is 1.897v stock and hits 1331 fully playble for hours but cn do 1377 bench
    hmm maybe powercolor using some bad chips on their cards, should i try vmem mod and whats max 24/7 vmem ?
    A64 2800@ 9x279 # Abit kv8pro 3rd EYE (vtt and vmem modded) # 2x256 mb TwinMos memory( with old winbond ch-5 max:240@3.5v) # 2x256mb KHX 3000 memory (with old winbond bh-5 max:270@3.7v)
    9600 Pro LE with vgpu mod
    Good Job!

  20. #370
    Xtreme Member
    Join Date
    Sep 2006
    Posts
    305
    Thats really nice tidy work there riska.
    intel G860
    asus p8z77-m pro skt1155 bios 1205
    Samsung 2x4b ddr3 1333@1600 8.10.9 1.53v
    MSI gtx560ti twin frozr 1gb
    1x120gb pny prevail elite/1x WD RE4 2TB
    Lg Slimline Dvd/rw sata
    Dell 2405FPW 24"
    Fractal Arc mii
    Xonar DX/Dell soundbar
    Hiper 580watt

    3.9ghz e6300-http://valid.x86-secret.com/show_oc?id=139796
    http://www.techpowerup.com/gallery/1834.html

  21. #371
    Xtreme Member
    Join Date
    May 2004
    Location
    Finland
    Posts
    270
    here is powercolor pcs model vgpu mod. Caution i dont take any responcebilities about cracked hardware! shade with caution! measure before use and be sure it's same component lay out! works for me. that component is shaded as you can see ^^


    http://xs123.xs.to/xs123/08020/picture_008622.jpg
    A64 2800@ 9x279 # Abit kv8pro 3rd EYE (vtt and vmem modded) # 2x256 mb TwinMos memory( with old winbond ch-5 max:240@3.5v) # 2x256mb KHX 3000 memory (with old winbond bh-5 max:270@3.7v)
    9600 Pro LE with vgpu mod
    Good Job!

  22. #372
    Xtreme Addict
    Join Date
    Apr 2003
    Location
    Denmark
    Posts
    1,015
    Thanks man i hate messy vmods
    The man with the littel Barebone!
    And proud Crew of!!!
    Octeamdenmark.com
    Shuttle SX38P2Pro Barebone E8600cpu and HD4870X2 gfx and 2gig Crusial Ballistix PC8500 Cl5 and 2x150gig Raptor in raid 0 and 1x750 gig seagate
    Msi 790FX-GD70 Mobo Amd 955-965 PHII cpus and 2gig Crucial value PC10600@800mhz 7-5-5-15 1T
    And 4x500GB Seagate 7200.12 in raid0
    4xHD5770 in CFQ.
    [SIGPIC][/SIGPIC]

  23. #373
    Registered User
    Join Date
    Feb 2004
    Posts
    349
    Is it fair to say that the memory doesn't benefit from more voltage?

    That seems to be the case from reading this thread...

    :: 3DMark01=66,732 :: 03=71,879 :: 05=26,413 :: 06=18,772 ::

  24. #374
    Xtreme Member
    Join Date
    Sep 2006
    Posts
    305
    If i connect my 100kohm trimmer from the yellow point to ground,is that correct? Also what do i need to set the resistance to on the pot,before i boot up? My pot is a 100kohm cermet 22 turn

    Thank you guys



    This is not my card which is a his3850 256mb,but the mod is the same for the 3850/70 is it not? apart from the vgpu measure points.

    I just want to make sure i do this right.

    EDIT-just measured vgpu while 3dmark06 was running,its hovering around 1.23-1.24v

    I just put my trimmer on.It is set on max resitance and the vgpu as it booted was 1.24vgpu.So now i just need to lower the resistance on the pot a tad and see if it goes up on 3dmark06 from 1.24v.
    Last edited by TI66ER; 01-14-2008 at 11:32 AM.
    intel G860
    asus p8z77-m pro skt1155 bios 1205
    Samsung 2x4b ddr3 1333@1600 8.10.9 1.53v
    MSI gtx560ti twin frozr 1gb
    1x120gb pny prevail elite/1x WD RE4 2TB
    Lg Slimline Dvd/rw sata
    Dell 2405FPW 24"
    Fractal Arc mii
    Xonar DX/Dell soundbar
    Hiper 580watt

    3.9ghz e6300-http://valid.x86-secret.com/show_oc?id=139796
    http://www.techpowerup.com/gallery/1834.html

  25. #375
    Xtreme Member
    Join Date
    Sep 2006
    Posts
    305
    well i set the vgpu to 1.36vgpu and tried it at 790mhz core on 3d06.It stomped it,this is with the core at 790mhz and my ram stock.It beat my stock score by loads.

    It seems the 22turn trimmer i have is roughly equal to 0.1volt increase per 3 full turns of the screw.

    The max temp while running 3d06 with the voltage on 1.36v was 53c using riva tuner to monitor it while i ran 3dmark.



    My old stock score with core and ram stock was 9800
    intel G860
    asus p8z77-m pro skt1155 bios 1205
    Samsung 2x4b ddr3 1333@1600 8.10.9 1.53v
    MSI gtx560ti twin frozr 1gb
    1x120gb pny prevail elite/1x WD RE4 2TB
    Lg Slimline Dvd/rw sata
    Dell 2405FPW 24"
    Fractal Arc mii
    Xonar DX/Dell soundbar
    Hiper 580watt

    3.9ghz e6300-http://valid.x86-secret.com/show_oc?id=139796
    http://www.techpowerup.com/gallery/1834.html

Page 15 of 40 FirstFirst ... 51213141516171825 ... LastLast

Tags for this 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
  •