Yeah, guess it's best to do the whole job... this is the board img-9133front-6645fb375eb63958085697.jpg (3105×3015)
The filling of those positions vary on other versions, with 9 of the short 680 4J instead of 6 and the 3 black ones, so I guess they are all post VRM, while the other 4 are pre-VRM. Don't have as many suppliers in the UK, the big ones seem to be mostly bulk / high minimum order.
Aliexpress would probably be a bad idea?? I mean, I like the prices but are they going to be what it says they are.
I suppose I ought to do the RAM VRM ones at the other edge, not sure which is the AGP VRM - maybe it's linear
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If you're replacing those caps, you should also replace the VRM caps as they are what makes sure that the CPU gets good voltage and has enough current to function properly (see circle in uploaded picture for location of caps recommended to replace, your board might be a little different, but you get the idea). I would order all of the capacitors in one go just in case and only solder in the ones needed, but that's your choice. Let me know the brand and model of the caps if you want recommendations, otherwise, you can always look through the Datasheet Depot and try to find replacements yourself.
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Which caps to replace: ECS P4M800Pro-M V1.0A
It's feeling like this board has a case of badcaps, instability and reboots - and not wanting to necro a a very old thread, it seems the 680uF 4V are highly suspect.
I don't really want to blanket recap everything, but maybe the others around that area could do with being changed?
Equipment: I have a temperature controlled soldering station, read the bit where it says set to 400F, don't think I would have gone that high without reading that.
Spring plunger solder sucker, and some desolder braid... and a bit of good old leaded 60/40.
PS. Additional diagnostic, after setting speedstep to minimum and turning off C1E, it did get into Memtest, where I'd never succeeded before, making me pretty sure that unstable power delivery is the problem
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