Ok, if you've had a Supermicro board die from bad capacitors, I'm sure you're familiar with the 'NRSY' brand of caps, since Supermicro used them frequently... 
Last week I purchased a large lot of 1000uF 10v caps said to be 'Nippon', which is a good quality cap (also makes Sanyo), which I've never seen fail, so I didn't think twice about buying them. When they arrived, they were sealed in Nippon factory packaging, but the actual caps were branded 'NRSY'... As I was about to pick up the phone and yell at someone for selling me phony Nippon caps, I took notice to their design...
The photo below is a comparison of a bad 1000uF 'NRSY' cap pulled from a Supermicro 370DL3 a couple weeks ago, and a 'NRSY' from my recent purchase.

You can see they're both branded NRSY.
This photo is of the canister seals. You will note that the newer NRSY is a true Nippon seal, while the bad one is a cheap knock-off. The vent on the bad one resembles a '+', and the newer one has the 'K' vent synonymous with Nippon/Sanyo capacitors.

Now, these photo's are a comparison to a genuine Sanyo 1000uF 16v capacitor, which is also manufactured by Nippon.

You will note the canister seal is identical.
Ok, the dead giveaway... The notorious Nippon/Sanyo 'K' vent...

I load tested a dozen or so of these new NRSY caps with my Sencore LC102, and they were all reading perfectly, so I'll try a few in some test boards and some other forms of abuse... Since these are clearly Nippon caps, I don't forsee any problems with them.

Last week I purchased a large lot of 1000uF 10v caps said to be 'Nippon', which is a good quality cap (also makes Sanyo), which I've never seen fail, so I didn't think twice about buying them. When they arrived, they were sealed in Nippon factory packaging, but the actual caps were branded 'NRSY'... As I was about to pick up the phone and yell at someone for selling me phony Nippon caps, I took notice to their design...
The photo below is a comparison of a bad 1000uF 'NRSY' cap pulled from a Supermicro 370DL3 a couple weeks ago, and a 'NRSY' from my recent purchase.

You can see they're both branded NRSY.
This photo is of the canister seals. You will note that the newer NRSY is a true Nippon seal, while the bad one is a cheap knock-off. The vent on the bad one resembles a '+', and the newer one has the 'K' vent synonymous with Nippon/Sanyo capacitors.

Now, these photo's are a comparison to a genuine Sanyo 1000uF 16v capacitor, which is also manufactured by Nippon.

You will note the canister seal is identical.
Ok, the dead giveaway... The notorious Nippon/Sanyo 'K' vent...

I load tested a dozen or so of these new NRSY caps with my Sencore LC102, and they were all reading perfectly, so I'll try a few in some test boards and some other forms of abuse... Since these are clearly Nippon caps, I don't forsee any problems with them.
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