GTX480 various vmods/mods

[Jor3lBR]

Where do you buy those quality caps Napalm?

[andressergio]

merci amigo

your boy.. felicita! whats his name?

may he be blessed with salud and awesome hardware to oc!

cheers!

Thanks Napalm Valentino is his name

Thanks for your blessings

Cheers
Sergio

[andressergio]

Where do you buy those quality caps Napalm?

Hey Jor i see Brazil cups there you have a great team how you make it


Those are solid caps i can find here also much easier to buy rubycon electrolitics...

Im sure you can get them on a good electronic store.

here's a link (napalm plz confirm) this are very low ESR

http://cgi.ebay.com/40PCS-470uF-16V-...item5192c10582

Cheers
Sergio

[Jor3lBR]

Double Caps

If you using 2200uf caps it's still better to have it w/ double caps 2200uf x2 = 4400uf?

I see you're using 820uf x2.

[NapalmV5]

pepinorang - nice

sergio - those caps @ ebay are good

jor - i got the 470uf chemicon caps

digikey.com -> search "capacitors" -> click "aluminum" -> filter voltage "16v" -> filter esr "9.0/10.0/11.0 mohm"

and you get..

16v 470uf 9mohm: http://search.digikey.com/scripts/Dk...me=493-3019-ND
16v 470uf 10mohm: http://search.digikey.com/scripts/Dk...me=565-3234-ND these are the ones i use
16v 820uf 11mohm: http://search.digikey.com/scripts/Dk...me=493-3115-ND these are the ones pepinorang uses

cant go wrong with any of these caps

if you got the cooling you can also go with the 2200uf or 2x 2200uf if you got enough space

you can also go with film capacitors..

i tried these 5 mohm cornell 940c: http://search.digikey.com/scripts/Dk...me=338-1170-ND

theyre big but these would be ideal to keep gtx480 warm @ subzero temps


go brazil!!

[andressergio]

pepinorang - nice

sergio - those caps @ ebay are good

jor - i got the 470uf chemicon caps

go brazil!!

thanks napalm wish i have a 480 to mod it still on the 285

chemicon amazing brand but i think those on ebay will do the job Jor

go Uruguay !!!

[Hondacity]

chemicon amazing brand but i think those on ebay will do the job Jor

chemicon = ncc = nippon chemi-con (japan) = ucc (united chemi-con) (usa subsidiary)

[CL3P20]

I have 16x 4700uf 16v caps on the way for 2x SSC FTW 480's...just completed OCP and CBB, still need to do OCP for vMEM and throw on the VR's....caps will be here in another 4x biz days

[Gunslinger]

I have 16x 4700uf 16v caps on the way for 2x SSC FTW 480's...just completed OCP and CBB, still need to do OCP for vMEM and throw on the VR's....caps will be here in another 4x biz days

I hope you ordered enough to mod 2 more.

[CL3P20]

Sure didnt.. :o ..but can though, and my supplier has up to 8200uf @ 16v as well...gonna see how these 4700's do first though. Pics to come soon as more substantial work gets done here..supposed to be in Pebble Beach atm, covering the 'Open' for ATT mobility..snafu's in the way atm though!

[NapalmV5]

thanks napalm wish i have a 480 to mod it still on the 285

chemicon amazing brand but i think those on ebay will do the job Jor

go Uruguay !!!

those on ebay are chemicon

go uruguay!!

[Olivon]

3-0

Nice Uruguay

[andressergio]

those on ebay are chemicon

go uruguay!!

thanks mate 3 - 0 awesome !!!!

3-0

Nice Uruguay

Thanks Olivon

[Stelios]

A friend sent me some capacitors . They are exactly these from FRAKO . 16v/1000μF



I submerged them to LN2 and at -80c i measured 700μF capacity . At -70c around 850μF ... And -60c almost 1000μF .
Below -80C they loose pretty fast their capacity , but this will never happen because they are far away from the cold gpu core .

Do you think i should use them ??? I have a friend who can test their ESR ...

[CL3P20]

those caps look great..especially with the temp tests you quoted Look like the right stuff to me! ..and you got just enough for 1x GPU.

*from what I understand, ESR is not an issue with the 4xx's.. only capacitance..so uf rating would be more important than given ESR value of the cap, for the mods you are doing.

[nickless]

@NapalmV5, is there similar pencil vmem mod for GTX480 like this one for 470:
http://http://vr-zone.com/articles/nvidia-geforce-gtx-470-voltage-modifications/8763-3.html

[Johnny87au]

if im reading your post correctly, you have just increase the memory of the card with your mod?

[FoX360]

thanks napalmv5 for your time

I will try the next week with some ln2.

Polymer caps;

[Hondacity]

gigabyte caps...from gigabyte plant?

i wonder where gigabyte gets those...prolly china

[jmax_oc]

If I understand the goal to add capas on VGPU, I don't understand the serial connection... It decrease the global capa and increase the ESR/ESL. So it's at the opposite of voltage regulation. So, do I miss something ?

[DEVIL K-ce]

Confirmed - working mods I do only cap mod with 2200/16v. Napalm You say more than 1000/16v is good for phase and more, but 2200 work very good on stock cooler 880MHz and no more fps drop.

Thanks !



Sorry for low quality photo SE K800i

[Icebob]

Been awhile since I've been in school so correct me if I'm wrong, I always thought that capacitors work the opposite way as resistors, in series resistors value are added and in parallel they are divided, so when you put capacitor in series, the capacitance should decrease, so in theory it would be better to use them in parallel for double cap?

[CL3P20]

There are already 1x set of caps on board..so adding 2x more sets linked in series, you have 3x total now..

*series = increase in voltage potential
*parallel = increase in current potential

If you think of them as battery's..

stock = 12v of electrical potential on the input phase
1x set of caps in parallel = 12v, with increased current potential on each input phase
1x set of caps in series = 24v of electrical potential on the input phase
2x set of caps in parallel = 12v, with increased current potential on each input phase
2x set of caps in series = 36v of electrical potential on the input phase

..granted the GPU is still being fed from a 12v source..but you get the principle.. 'extending the capacitance'

[Harshal]

Very Nice thread!
Thanks Napalm and others for sharing!

[Hondacity]

There are already 1x set of caps on board..so adding 2x more sets linked in series, you have 3x total now..

*series = increase in voltage potential
*parallel = increase in current potential

If you think of them as battery's..

stock = 12v of electrical potential on the input phase
1x set of caps in parallel = 12v, with increased current potential on each input phase
1x set of caps in series = 24v of electrical potential on the input phase
2x set of caps in parallel = 12v, with increased current potential on each input phase
2x set of caps in series = 36v of electrical potential on the input phase

..granted the GPU is still being fed from a 12v source..but you get the principle.. 'extending the capacitance'

http://farside.ph.utexas.edu/teachin...es/node46.html

if you have a 12v source across two capacitors in series the voltage across the two capacitors will be the same.

when computing for total series equivalent capacitance..well you use the capacitance formula 1/Ceq = 1/c1 + 1/c2 + 1/ce ...

there are minimal uses for series capacitance in the first place because of loss of "capacitance" or should i say lesser capacitance unless its really needed - read http://www.coilgun.info/theorycapaci...apacitors2.htm