Kriztoffer 5870 volt mod

[Kriztoffer]

Been working on my 5870 today.

Things done:
Soldered 11x 470UF 6.3v Caps onto the phases.
Removed stock VR at OCP and added 18K fixed VR for OCP mod
Voltage read
GPU Vcore boost ( I'm missing the 50 OhM VR)

http://img714.imageshack.us/img714/5884/img4671.th.jpg (http://img714.imageshack.us/i/img4671.jpg/)http://img156.imageshack.us/img156/930/img4635f.th.jpg (http://img156.imageshack.us/i/img4635f.jpg/)http://img683.imageshack.us/img683/1081/img4637s.th.jpg (http://img683.imageshack.us/i/img4637s.jpg/)http://img697.imageshack.us/img697/6513/img4636i.th.jpg (http://img697.imageshack.us/i/img4636i.jpg/)

I'm looking for more hardcore mods! please shoot me a tip if you got one.:D

- Kriz

[Chuchnit]

Add an extra 6-pin connector for input. That's about all you can do after the vmod and extra caps.

[Splave]

looks great man

[ReverendMaynard]

looks awesome. Maybe an evbot mod next :)

[crustytheclown]

Fantastic work man!!!
Just add some caps here and you're good to go.
It will help your memory a lot at low temps...

http://overclockaholics.com/forums/attachment.php?attachmentid=1489&stc=1&d=1265916492

Adding extra 6 pin can be a tricky business especially when soldering and choosing the right cables for the job so i wouldn't even mind...

[ocgmj]

Excellent advise crusty!

[Kriztoffer]

Thanks for for everyone taking their time to comment! :thumbsup:

Crusty should I just use 470UF 6.3v caps for it?

I´d love the extra 6pin, can´t be that triky and I´m really up for it! if anyone have time to explain, I´ll listen carefully!:)

Thanks a lot for the advice!

[crustytheclown]

Yes use the caps you have.
For the 6pin mod for start just measure the coils to see which get 12v...for start because after that it becomes really tricky...

[Kriztoffer]

Yes use the caps you have.
For the 6pin mod for start just measure the coils to see which get 12v...for start because after that it becomes really tricky...

I will look into it over the weekend. Is there any signaficant gain from the extra 6pin mo?

I was looking after some heatsinks for my 5870 to use under ln2.

Anyone have any experiance with this kit from scythe?
http://www.scythe-eu.com/en/products/vga-cooler/vga-chip-heatsinks.html

[Neuromancer]

Umm.. you are recapping and vmodding your board...

Shouldnt you be looking for a new GPU pot? ;) lol

[Kriztoffer]

I think the kp 6.66 should do the work:p

@Crusty how would 560UF 4v work on the memory recapping?

- Kriz

[HITandRUN]

I will look into it over the weekend. Is there any signaficant gain from the extra 6pin mo?

I was looking after some heatsinks for my 5870 to use under ln2.

Anyone have any experiance with this kit from scythe?
http://www.scythe-eu.com/en/products/vga-cooler/vga-chip-heatsinks.html

Nice job on the vmod. Regarding to the heatsinks. I have been making sinks from time to time as needed. Here some pics of back in the day :D Voltmodded 8800GT

http://i39.tinypic.com/10365tt.jpg

http://i44.tinypic.com/ka19fl.jpg

http://i42.tinypic.com/fz68wi.jpg

[Splave]

2.5v 680uF low esr caps okay?

[Kriztoffer]

Most people say use what you have as longe they are low ERS. I see a lot of people using 470UF 6.3v, also 560UF 4v. mostly everything works. But higher "voltage" value will say the cap can take more voltage. So if you have a 100UF 1.5v and run over 1.5v the cap will blow!

But don't use caps with higher UF than 1000 I think. Patch at Overclock.net had problems with his 1500UF 6.4v caps at his 5870.