6600 Possible Poly-Mod?

[delaware74b]

I have an older 6600GT PCI-E video card that still has 5 functioning Sacon FZ509's. I have researched that Nichicon HN's are a good replacement for these FZ's. All are 470uF 16Volt 8 x 12mm through-hole. ESR is claimed to be 1150mA @ 0.036 from Sacon's data chart.

I can go with a lower-voltage on 2 of the caps as they have 5 volts and 2 volts (measured in circuit and running). The three remaining do have 12 volts on them.

What would be recommended values in uF for the various locations or would I be better off just replacing them with the HN's?

Also, who made the cap in the lower right corner of the board (the one with 1.02 Volts), looks like a 470uF 6Volt 10mm SMD.

BTW, the remaining purple caps are Sanyo Os-Cons- 820uF 4 Volts.

[c_hegge]

Re: 6600 Possible Poly-Mod?

It looks like they all have space for 10mm caps. If so, you could use these for all of them. does the PCB also allow for a through-hole cap to go where the SMD one currently is?

[delaware74b]

Re: 6600 Possible Poly-Mod?

c_hegge - the back side of the board allows for through-hole components under all of the smd caps.

[c_hegge]

Re: 6600 Possible Poly-Mod?

In that case, the 330uF Sanyo SEP caps should be fine for all of the 470uF 16V electrolytics.

[delaware74b]

Re: 6600 Possible Poly-Mod?

Thanks c_hegge.

Just ordered the caps from this site.

[Hemingray]

Re: 6600 Possible Poly-Mod?

Are the ventless purple ones sacons too?

[delaware74b]

Re: 6600 Possible Poly-Mod?

They are Sanyo Os-Cons, 820uF 4 Volt.

I pulled one of the dreaded FZ's so you can see the label. It tested at 2x the published ESR at .07 ohms but the cap tested within spec at 465uF.

I suppose is wouldn't be too much longer before they

[delaware74b]

Re: 6600 Possible Poly-Mod?

I received the poly's on Thursday and installed them on the video card. I ran it for about an hour yesterday and all is well. The remaining Sacon's all tested at .07mohm despite testing fine for uF.