generic nvidia card with captop (craptop)caps.

[kc8adu]

went to polymers.
yep its a waste on this thing.just playing around with it .
belongs in a friends server so we will see how it does longterm.

[bgavin]

Re: generic nvidia card with captop (craptop)caps.

Did you keep the same uF rating when you installed the polymers?

Also, I noted one old cap still in place.... ?

[UraBahn]

Re: generic nvidia card with captop (craptop)caps.

Nice! I wish I had polymers to throw around like that.

@bgavin
The "old" cap looks like a Rubycon MBZ to me.
Also, IIRC polymers with 1/2 the capacitance value can be used in place of certain aluminum electrolytics.

[kc8adu]

Re: generic nvidia card with captop (craptop)caps.

the lytic is on +5 and is a new rubycon mbz
the 560@4 are on +3.3
the 820@2.5 are on 1.5-2.5 v
remember you can use a polymer 1/2 the uf rating as esr is much lower which is the most important.

[bgavin]

Re: generic nvidia card with captop (craptop)caps.

What is the down side of replacing a 330uF lytic with a 330uF polymer?

According to the above rule, this is essentially doubling the capacitance rating, and jumping up to a 660uF lytica equivalent. Bad news?

[kc8adu]

Re: generic nvidia card with captop (craptop)caps.

What is the down side of replacing a 330uF lytic with a 330uF polymer?

According to the above rule, this is essentially doubling the capacitance rating, and jumping up to a 660uF lytica equivalent. Bad news?

wont hurt a thing.
i get a feel for what works by doing mods and testing.
oscope is your friend here.

[bgavin]

Re: generic nvidia card with captop (craptop)caps.

I haven't had a 'scope since I left IBM in '93. Back then, my friend was a company-issue Tektronix 454. Good enough for what I needed.

It works better for me to ask questions of you guys who have scope lives. I already have computer, music, and speaker building lives... no more time for any more lives.

Can one count on the quality of Sanyo OS-CON polymer caps?

[davmax]

Re: generic nvidia card with captop (craptop)caps.

BGAVIN I guess you were joking!!! and already know a 330uf polymer in place of a 330uF wet electro is likely to reduce ESR by two or more and capacitance is naturally the same. A great substitution.

[PCBONEZ]

Re: generic nvidia card with captop (craptop)caps.

There are lower end polymers out now that have worse ESR than the better lytics.

.

[shadow]

Re: generic nvidia card with captop (craptop)caps.

There are lower end polymers out now that have worse ESR than the better lytics.

.

Hmmm.....interesting!

[bgavin]

Re: generic nvidia card with captop (craptop)caps.

BGAVIN I guess you were joking!!! and already know a 330uf polymer in place of a 330uF wet electro is likely to reduce ESR by two or more and capacitance is naturally the same. A great substitution.

No sir, no joking from me at this point in my education.

I read everything posted by the gurus here, and learn from it. Hence, the apparent humorous (read: stupid) questions. I learn by immersion, which is why I assemble huge spread sheets that contain knowledge. Repetition and immersion pound it into my head.

I finished entering the Sanyo SP polymer series in my sheet. I compared the 180uF/10v ESR to the Rubycon ZL. Huge difference in ESR and leakage current. Probably a huge difference price, too.

[PCBONEZ]

Re: generic nvidia card with captop (craptop)caps.

Polymers usually cost anywhere from 2x to 6x what lytics do.
-
But then, on a critical system you are going to leave together for a long while they may be worth it for reliability and longevity. They have actually been using them on better server boards for quite a long time. I have a pair of 1998/1999-ish Intel 440BX based dual P2 server boards that are 100% OSCON.
(Those boards retailed for $899 back in the day. Just the board.)

.

[RJARRRPCGP]

Re: generic nvidia card with captop (craptop)caps.

I can't recall seeing a "Captop" cap before.