7700K partially damaged from delid (only one memory bank works) - How much would you pay?

nzalog · Apr 20, 2017

So just trying to get an idea how much I could sell my screw-up for.

While deliding my 7700K with a razor, I lightly nicked the PCB on the CPU. At first I thought it was completely dead but after some troubleshooting I figured out it still works if I only populate the second Dimm bank and not the first.

So I'm trying weigh my options:
-Selling this one on eBay (as is explaining it's state) and just buying another 7700K.
-Keeping this one and just running one Dimm (i have an itx board, so I'd only be able to use one Dimm total).

Thoughts welcome. Please don't beat up on me too badly, I already feel bad as it is.

13thmonkey · Apr 20, 2017

Only an idiot would buy it.

jowen3400 · Apr 20, 2017

The damage could be more than how you let on. I would say like maybe 50 bucks and they take all the risk.

nzalog · Apr 20, 2017

eBays policies are pretty strict. If I don't describe it correctly, I'd have to take the return and take care of the cost of shipping.
Outside of not being able to use both memory banks, it's 100% stable on the second bank.

nzalog · Apr 20, 2017

jowen3400 :

Any ideas on how to prove that? Was thinking just see if it would pass a long Prime95 test.

Rogue Leader · Apr 20, 2017

Toss it, its not worth using and nobody in their right mind would buy it. One memory bank now, but you've damaged the silicon, any number more problems could show up later.

And this kids is why you don't delid!

jowen3400 · Apr 20, 2017

Like Rogue said it is damaged now ... Any number of cases can cause this. so if the memory controller is damaged then that is that. BUT if a PCI lane is damaged that the Motherboard just disables the Memory lane. Could be USB, PCI, etc damage. Like I said 50 bucks with VERY clear would be about the best you are going to get. If you don't like that then buy a new 7700k and use that old CPU as a key chain or something.

nzalog · Apr 20, 2017

Rogue Leader :

You think the silicon is damaged by severing traces on the PCB?

jowen3400 · Apr 20, 2017

I do... I would hate to have you burn up a board over a bad CPU. But your dollar.

nzalog · Apr 20, 2017

Thanks for all the feedback, I appreciate it. Obviously not something I want to hear but it's probably just the denial phase of grieving.

Rogue Leader · Apr 20, 2017

nzalog :

no, but you said you took a chunk out of the silicon, if you also severed traces on the PCB theres a lot of problems that could come from that.

nzalog · Apr 20, 2017

Rogue Leader :

Did I?

I lightly nicked the PCB on the CPU

It actually looks only like cosmetic damage but you do see a little bit of silver among the green PCB, but apparently it was enough to damage some traces though

Rogue Leader · Apr 20, 2017

AH must have misread it, still there are so many traces even along the edge, as mentioned so many other things may not work right. I don't see damage happening because of it, but its a waste of time to use it.

Ecky · Apr 20, 2017

You might try putting some conductive ink in the nick. If it's only a single trace you broke, that might complete the circuit again. The other memory channel may not be stable, but it seems worth a try to me.

EDIT: For what it's worth, I rather wish I hadn't delidded my 3570K. My delid was successful and it dropped temps a lot, but I wasn't able to overclock even 100mhz higher and it destroys any resale value.

nzalog · Apr 21, 2017

Ecky :

Believe me I tried all sorts of stuff with the assumption that I could possibly make it way worse and 100% unusable (or possible fix it with some dumb luck).

I tried to brush the area in different directions then covering damaged area with tape so that the lid would put pressure on it. Nothing...

I also tried the same thing but avoiding putting pressure on the area. Nothing...

Now I started to get desperate.

I tried to streak solder across in maybe 4 or 5 different directions. Nothing...

Finally I put a big glob in there, tried it but the glob got pulled off by the lid (and took more traces out with it).

At this point I was pretty confident the 1st ram slot was a goner. I tested, one last time to make sure it still works with at least one dimm and it did (luckily). I'm just going to relided everything and glue it with some high temp silicone.

I think after some thorough testing I may just keep the thing. Right now I have 2 x 8GB sticks of ram, going to return and swap for 1x16GB. So far all the benchmarks I've ran are up to par to a 7700K. I'm just going to sleep in the bed I made for myself and continue using this thing as-is.

Already starting to hear about Coffee Lake... So if I buy another CPU it might as well be that. It appears to be socket 1151 as well.

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7700K partially damaged from delid (only one memory bank works) - How much would you pay?

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13thmonkey

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nzalog

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nzalog

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Rogue Leader

It's a trap!

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jowen3400

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nzalog

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Rogue Leader

It's a trap!

nzalog

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It's a trap!

Ecky

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