No, not essential. Some mobo manufacturer considered it unnecessary therefore they left the chipset open to air relying on ambient chassis air flow to dissipate chipset heat load. I think it likely those 990 mobo w chipset heatsink and those without have different DP/N due to different board version. [URL]
Hi All! I have a question. I bought an Optiplex 990 MT But i noticed that when i look at motherboard pictures online that I do not have a part on it. I think its the VRM heat sink. I will add 2 pictures. One with and one without. Is it a problem mine is missing and should i place one? Or no need?   Thank you very much and im sorry for my (not so great) English. TT [IMAGE][IMAGE]
No chipset heatsink on my 990 MT ?