Dei uma pesquisada rapida, e consegui um kit que ultrapassa um pouco os 2 mil mas pelo menos é ddr4. Montei um parecido para meu sobrinho. Talvez você precise trocar seu gabinete, mas tem várias opções pra voce escolher.
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https://produto.mercadolivre.com.br/MLB-1868482816-cpu-cooler-lga-2011-processadores-intel-tdp-130w-8-heatpipes-_JM#position=2&search_layout=grid&type=item&tracking_id=8aeaaddd-fb50-443f-ab4d-6fc6f019c3fc
https://www.kabum.com.br/cgi-local/site/produtos/descricao_ofertas.cgi?codigo=48575&gclid=Cj0KCQjw8IaGBhCHARIsAGIRRYr-c5IHTErALavpBM8E6KI70LxUFVACKdekbqVpwX4XjEBBKGgTHnkaAprEEALw_wcB
https://pt.aliexpress.com/item/32847169083.html?spm=a2g0o.productlist.0.0.716cbc70NZMiiU&algo_pvid=8caab460-bc99-4d36-a245-f368d0568a36&algo_expid=8caab460-bc99-4d36-a245-f368d0568a36-0&btsid=0bb0622916233390317954216e0ebd&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
https://pt.aliexpress.com/item/1005001715848364.html?spm=a2g0o.detail.100009.2.440c43576EHcCl&gps-id=pcDetailLeftTopSell&scm=1007.13482.95643.0&scm_id=1007.13482.95643.0&scm-url=1007.13482.95643.0&pvid=f614164a-df6c-4e3d-9cca-4d573acdd836&_t=gps-id:pcDetailLeftTopSell,scm-url:1007.13482.95643.0,pvid:f614164a-df6c-4e3d-9cca-4d573acdd836,tpp_buckets:668%230%23131923%2389_668%230%23131923%2389_668%23888%233325%231_668%23888%233325%231_668%232846%238114%231999_668%235811%2327182%2352_668%232717%237563%23557_668%231000022185%231000066058%230_668%233480%2315683%23429_668%232846%238114%231999_668%235811%2327182%2352_668%232717%237563%23557_668%233164%239976%23832_668%233480%2315683%23429