pastrychef
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- May 29, 2013
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Nice! I've never seen a soldered die this clean! Did you use any polishing cream/pad, or just conductonaut?
Yes, with LM+IHS, you should get a 10-15℃ drop, compared to stock. I assume it's the Rockit Copper IHS. If yes, then note that since it's not nickel plated (and its surface, although very flat, not mirror polished), the gallium in the LM (conductonaut is a type of galinstan alloy) will slowly diffuse into the copper to form a copper-gallium alloy (resulting in increased temps), so you might need to replenish/reapply LM for a second time after a few weeks. After that, the diffusion becomes slower.
In the meantime, (if you still have your 8700K) you could try testing with Prime95 (if you haven't already) to make sure that your M/B can handle the extra load. Using Prime95 v26.6 (i.e. non AVX), run a torture test, for at least 30 minutes, with the settings in the attachment. It would draw ~180W of package power, so about the same (if not a bit less) with what an overclocked 9900K would draw under real-world heavy workloads (e.g. handbrake, blender).
If, during the test, the clocks remain stable at 5Ghz (you could check with Intel's power gadget), then you should be good to go, otherwise, you might also need to look into improving your VRM cooling while you are at it.
Good luck and have fun!
Yes, I used some Flitz with paper towels to clean it afterwards.
Yes, I have a Rockit Cool Copper IHS coming. I noticed that the stock IHS is a bit convex on the top and after my delidding, it teter-toters on the die far more than I ever remember on any of my other delidding jobs. I'm sure the copper IHS will be much flatter.
Yes, I know that Gallium reacts to copper, but I've never had to reapply liquid metal because of it. As far as I understand, it's does not affect thermal performance. In the past, I've used liquid metal between GPU die and copper plate without ever having to redo it a second time. Temperatures remained fantastic for many months.
I did run Prime95 when I first put my build together and there weren't any problems. I'll try again a bit later. I already received my Fujipoly and I'll be applying at the same time I pull my i7-8700K.