What does it say on the top of the chip?
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What does it say on the top of the chip?
Its too tiny to see....... :(Quote:
Originally Posted by persivore
The resistor I marked reads 1.202v when idle and bumps up to 1.420v when in 3D jus like with the GTX. Hope this is a suitable point on the PCB........ :p:
Good news I managed to find a magnifyin glass :D The chip is a Intersil 6563CRZ. It is a Two-Phase Multiphase Buck PWM Controller with Integrated MOSFET Drivers and can be found here ........ :p:
That looks like its the Vgpu regulator :). it looks very small tho, so it might be quite difficult to get readings from it or solder to it.
Can you try to get a bigger picture of the chip so that I can mark some pins and look for alternative solder points.
7800gt volt mods
http://www.vr-zone.com/?i=2656&s=1
Christ......arent they fast :eek: The Forum discussion can be found here :)
Well persivore there isnt much point in goin on is there...... :)
Thanx alot for the services rendered persivore...... :woot:
I will post my results when I have applied them mods in time to come....... :)
Hey Afterburner, I did the vGPU mod from the link you provided and it worked perfectly.
Thanks for the link man. :D
is there a vram mod for this?
vrzone is dead for me...
No probz bud......credit goes to Fosco :toast:Quote:
Originally Posted by Mysterfix
I suppose you are refering to the onboard RAM mod. In this case Vram mod a.k.a Vddr mod can be found pictured here if you dont wish to follow Vr-zone's mod..... :)Quote:
Originally Posted by goatman
Jus a Heads Up for all you guys.......a 7800GT has already broken 9000 in 3DMark 2005 on High End Air at an ambient of 18*C with no artifacts which shows the potential of this baby and thats not even the max yet ! A waterblock will be used to see what the Card can do.... :p:
I have yet to do mine though..... :slap:
Guys refer to the first post for the latest mod updates...... :toast:
lol, i meant vcore
I did the VGPU on my 7800GT now I Can get artifact free 500Mhz @ 1.55V 48ºC Full (daily) or eighter 600Mhz @ 1.7V 57ºC Full (Bench)
Can you guys clear a few things up for me? The write-up over at VR-Zone says to use a 3k ohm trimmer for the vgpu but since most places I can find don't carry that size can I just use a 5k ohm trimmer? Also is there a minimum power rating, like 1 watt or something?
I'm also hearing two different ratings for the vmem mod trimmer. Should I use a 20k ohm or 10k ohm trimmer?
The write-up does a good job at showing where to solder one side of the trimmer but I'm not sure where the ground points are for either vmod. Can someone point them out for me?
Sorry for the noob questions but this is my first vmod and I don't want to screw it up.
use 20k trimmer for vmem so you can get original vmem as well (10k give you about +0.1V even at max resistance)Quote:
Originally Posted by Elfear
Can't you see at the picture above? that show you a good ground poit (at pcie connector)
2005 score:
http://service.futuremark.com/compare?3dm05=1368057
Obrigado cada.Quote:
Originally Posted by Barr3l Rid3r
Anyone know if there's a minimum power rating for the trimmers? I heard 1 watt somewhere but I think that was for the 7800GTX trimmers.
The power rating of the variable resistors isn't important. There is not very much current/voltage going through the resistor, so the power in the resistor is very low. Just use the resistor with the smallest physical size that you can find :)Quote:
Originally Posted by Elfear
Sweet, thanks Persivore.
looks great guys. i will be doing this mod as soon as my card gets here.
well my 3d fusion 7800 gt (400/1000) got here today. hopefully the trimmers will be here soon. i will spend my time waiting for the trimmers practicing soldering. hopefully this will go better than my ill faited attempt with my 7800gtx a month or so ago. this card does 475/1130 with no issues on stock cooling. hopefully the volt mod and chilled water will squexe a little more out of it.
Mine did 500/1200 on stock cooling and voltage so you should be able to get similar results with water and a volt mod.Quote:
Originally Posted by cronic