I admire your thinking and enthusiasm. Looking at your current system, it appears that you've already made several upgrades and improvements to your original Dell configuration. Instead of looking at additional upgrades to the CPU
and motherboard, I'd like to suggest that you consider a different approach.
My first caution would be - even if it's possible to upgrade that CPU
, you will find your current BIOS
so limited that it's not adviseable. As to the motherboard, I would anticipate that a change here is also going to require other upgrades, including your PSU
. Then, one might want to consider the limitations of your case itself. It would be very easy for you to get "nickel and dimed" to death and still wind up with a system that begs for yet another upgrade.
As an alternative, you may be better advised to look at building a whole new system without the restrictions of "will this fit", "will that fit", "will this work with" or "will that work with". You probably could use several components from your current Dell and return it to more of an "original configuration" so as to not lose functionality of the Dell. The reasons I suggest this are basically twofold.
First, Dell and most other OEM machines are not good candidates for upgrading, especially in comparison to what you could build yourself. Secondly, you will get considerably more bang for your buck over the long term by building from scratch instead of continuing to pursue what else you could do to that Dell.