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It can lower temps by about 5c. Is that necessary? If you are overclocking, water cooling or using heavy multi core workloads then sure. A contact frame can be had for $5 these days.
For gaming tho, no. Games don’t run hot enough for 5c to matter much
Depends on your use case tbh. If all you are doing is gaming it literally doesn’t matter. Throw on a $35 phantom spirit air cooler and be done with it. Games just don’t get the cpu hot enough for a contact frame to matter. If you are doing anything more than that tho it’d be stupid not to get one.