5870 and 5970 voltmods guide

[crustytheclown]

5870 voltmod

http://img405.imageshack.us/img405/3526/5870vmod.jpg (http://img405.imageshack.us/i/5870vmod.jpg/) http://img405.imageshack.us/img405/5870vmod.jpg/1/w1280.png (http://g.imageshack.us/img405/5870vmod.jpg/1/)

http://img205.imageshack.us/img205/4933/p0111090002.jpg (http://img205.imageshack.us/i/p0111090002.jpg/) http://img205.imageshack.us/img205/p0111090002.jpg/1/w1280.png (http://g.imageshack.us/img205/p0111090002.jpg/1/)

5970 voltmod

http://img31.imageshack.us/img31/1748/vmod59701.jpg (http://img31.imageshack.us/i/vmod59701.jpg/) http://img31.imageshack.us/img31/vmod59701.jpg/1/w1280.png (http://g.imageshack.us/img31/vmod59701.jpg/1/)

http://img205.imageshack.us/img205/9412/dsc01092nz.jpg (http://img205.imageshack.us/i/dsc01092nz.jpg/) http://img205.imageshack.us/img205/dsc01092nz.jpg/1/w1280.png (http://g.imageshack.us/img205/dsc01092nz.jpg/1/)



Sorry if some pics are low res...

[Kal-EL]

Looks like some of the pics are not viewable. What kinda clocks would you see with a v-mod like this?

[sofos1990]

That's the spirit Antonis :)
What clocks did you get with the mods ?

[Neuromancer]

5870 1.6vs those crazy kingpincooling guys were running 1300+ MHZ :)

[Kriztoffer]

Hi, Crusty. Looks nice!:)

I need some help. I'm not sure how many caps I need. I've spoken to TiN about some caps for Vmodding the 5870. He would have gone for some 560UF 4v from Os-con.
SANYO OS-CON SP Conductive Polymer 560uf / 4vdc (http://cgi.ebay.com/30pcs-SANYO-OS-CON-SP-Conductive-Polymer-560uf-4vdc_W0QQitemZ330391722511QQcmdZViewItemQQptZLH_De faultDomain_0?hash=item4cece19a0f)



I will probably get another brand with same values, but that's not very important as long they are good caps.
I'm going to order some stuff from my local TV/radio man, he's a good guy. Very helpful...


There are 6x power phases for GPUv output...there are 2x for vmem output.. me thinks 4x GPUv input and 1x vmem input, right?

And this is also true?
- Cap GPUv output phases.. at least 1x cap per phase..
- Cap both mem phases, 2x caps per phase [front side of PCB]

Could you help me out clearing this up? I'm new to the game, and I just know how to solder. Not much more..just easy basics.


As for value, it's not very important exact capacity value. You can use 220uF or 100uF or 470uF. More >>> better >>> but also larger cap. You will be nice if have ~1000-2000uF on each phase. More - can be bad, coz more capacity = more loading for FETs to drive energy fast.

Thing you have to take care - working voltage. On GPU's/CPU's usually upper limit is 2V, but you should have some space to be safe. So 4V caps are nice here.
For mems voltages are 1.5-2.5V, so I would use 4V, better 6.3V here.


[B]Fujitsu RE 6.3V 1000UF Aluminum solid capacitors (http://cgi.ebay.com/4-Fujitsu-RE-6-3V-1000UF-Aluminum-solid-capacitors_W0QQitemZ300332269531QQcmdZViewItemQQpt ZLH_DefaultDomain_0?hash=item45ed32bfdb)



So how many caps will I need of each value and voltage?
I will also order a 50 Ohm VR. I've also heard you need a e 20k for OCP?

Man I'm confused. What would be the best 4v or 6.3v for this volt mod?

HI got a few caps from a dead MSI Motherboard, anything usefull?
http://img121.imageshack.us/img121/8494/img4474u.th.jpg (http://img121.imageshack.us/i/img4474u.jpg/)

Best Regards Kriztoffer.