Arctic Alpine Pro 64 V2

socialfox

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Honestly, it may perform a bit better than the stock cooler or have equivalent performance. I just checked the stock cooler and it seems to be made up completely of aluminum. You Alpine pro 64 v2 is made of the same thing but still it may yield better results. I would expect better temperatures (not by too much). At the end of the day you have nothing to lose apart from thermal paste and some time.

Edit: Just check the Alpine page, and it seems like it claims to have a cooling capacity of 90 watts whereas your processor has 100 watts. I would just say give it a shot, like I said above expect equivalent or maybe a small increase. Nothing to lose really....