Closed Help with Upgrading CPU for Optiplex 745 SFF Tags: CPUs Optiplex Product Last response: February 26, 2013 7:39 PM in CPUs Share apoklepz January 30, 2012 4:51:33 PM I was recently given a refurbished Dell Optiplex 745 SFF slightly upgraded with this HDCP card and 4GB RAM. I would like to know if there is a processor out there that would push the machine's performance speed higher than its default one clocking at 1.8GHz. I'd like to hit the 3GHz to 4GHz mark if possible and if the mobo allows it. Any help and guidance is appreciated. Thanks in advance. More about : upgrading cpu optiplex 745 sff abekl a b à CPUs January 30, 2012 4:59:09 PM I think you are out of luck. The cpus that this unit supports have been out of production for a long time. You might be able to find one used on ebay. Use this as a guide in selecting a cpu: http://www.dell.com/downloads/global/products/optix/en/... Brett928S2 a b à CPUs January 30, 2012 5:02:25 PM Hi It is too ancient....NO WAY are you getting anywhere near even 3 ghz.... All the best Brett Can't find your answer ? Ask ! Get the answer apoklepz January 30, 2012 5:42:44 PM Okay guys, I really appreciate the quick replies but I'd like it if somebody could throw out a few names/model numbers of CPUs that could simply just be faster than the factory one. I found this old thread where the guy says he managed to get the smallest Optiplex 745 USFF model to be faster with a Q6600 SLACR at around 2.4 GHz. Having read this I'm confident that there has to be something that can make my SFF model a bit faster than that but I need direction. Please help with name/model suggestions as I am new to all this hardware upgrading stuff and don't know where to look first. Greatly appreciated. Can't find your answer ? Ask ! Publish Related resources : ForumDell Optiplex 745 SFF ForumPrebuilt Optiplex 745 SFF upgrade and compatiblity ForumWhat's the fastes CPU optiplex 745 can take? ForumBest Video Card!! Dell Optiplex 745 SFF 2.8Ghtz Dual DDR2 4GB Ram ForumDell optiplex gx620 SFF cooling issues Forumold thread ForumFan noisy after ugrade dell optiplex GX620 SFF ForumDell Optiplex 745 PSU help ForumDell optiplex 745 cpu compatibilty Forumoptiplex 745 SFF ForumUpgrade Dell Optiplex 745 ForumDell Optiplex 745 SFF upgrade ForumACHI mode in Dell Optiplex 745 sff . Please help . ForumOptiplex 745 SFF ForumOptiplex 745 SFF power upgrade ForumFX-6200 vs FX-6300? ForumLOUD PSU FAN PLZ HELP ForumNeed help on deciding. OCZ vs Corsair Forum[Solved] Fluctuating Temperature with OC i5 2500k Forum[Solved] Need help selecting a processor More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !