theonerm2 :
Have you overclocked your 4770K any? There's really little difference from a 4770K to a 4790K. Just higher clock speeds. You could just set your 4770K to 44, 44, 43, and 42 on the ratios. That would simulate a 4790K. If you really want a 4790K you can just overclock to the same settings and you basically have one. The only issue here is maybe you have one of those duds that can only get 4.3GHz or less. If so then you would have to upgrade to the 4790K in order to get those speeds.
I say this answer depends a lot on you. Do you love technology? Do you crave the best you can get? If so go for option A and get it. You will be happier if you do that. Especially get it if you love to overclock and you aren't getting the results you want out of your 4770K. I know I have a 4770K and I had trouble reaching 4.5GHz. I had to delid my CPU and get water cooling to get the temperatures I wanted. It was a real pain to deal with but I got the 4.5GHz speed that I wanted in the end with great temps. If you're happy with your 4770K then just go for option B. I know Avro Arrow is saying to just replace the motherboard and keep using that old Phenom but I think it's time to upgrade. It's really time to upgrade that CPU. It's very old now. People say if it still works don't replace it. I say replace every 3 to 5 years if you game. CPU's are fine to keep longer but if you're a gamer the CPU is a critical component and you have to keep it up to date as well as the graphics card or you won't have the best experience with your games. Every 5 years or 3 years if you're an upgrade junkie is the perfect amount of time to upgrade the CPU for a gamer. If all you do is basic things like browse the web, listen to music, and watch videos then every 10 years you should upgrade the CPU. I say even upgrade it if you only play the basic games because if you're a gamer now chances are you will want to try out other games and if you don't have the CPU power to give you a good experience in those games you're going to have to upgrade anyway or just be forced to either buy a console or not play what you want.
I like how you think. I just researched myself out of getting a 4790k (and a 4690k), a 4.6 or 4.7ghz overclock is typical,I was thinking Id easily get a 5ghz overclock.
I got my 4770K when it was brand new, .Its stable at 4.3Ghz with at 1.185V. gamings temps are between 62 and 67.
BUT in stress tests hottest core hits 93C, coolest doesnt go above 78C.
Tried Crorig H5 Ultiamite, Noctuna-D14, and Hyper 212. The 212 ran like 4C hotter, the other two had identical numbers.
Obvious my IHS has uneven TIM needs delidding, I'm not ready to try take a hammer or razor blade to it yet, if ever.
I was under the impression the 4790k went back to a soldered IHS, it doesnt
To arrow's point that the phenom X4 is going to waste, the spare Z97 mobo is worth more and also going to waste, something will be wasted. I have an Athlon 64 3500, and an Athlon X2 5600 also collecting dust. My old Athlon M350 laptop is used as our main HTPC, plenty if muscle for Netflix and 1080p video
NOW Im thinking maybe get wifey a G3258 OR 4590. G3258 is not great but $50 vs $160, may be enough to run things as smooth as before for one more year.