I have some questions about my PC upgrade

[Sha D Cl1]

Hi. So I finally decided to upgrade my PC and i have some questions. My current build contain the following components:
Motherboard - Gigabyte EP35 DS3L
CPU - Core 2 Duo E6600
GPU - Nvidia GT 630 1GB
RAM - 4GB DDR2

And I want to upgrade to this:
CPU - Core 2 Quad Q9550 / Core I5 650
GPU - Nvidia GTX 750 ti OC
RAM - 8GB DDR2

And my questions are:
1. Will those components be compatible with my motherboard ?
2. Will it be a problem if the memory is only DDR2 ?
3. What should i choose between Q9550 and I5 650 (for gaming) ?
4 Will a 450 watts source be enough for this build ?

I hope I've been clear, thank you !

 

[Pentium4User]

1.yes it would be compatible 2.DDr2 should not have any issues unless the ram is dieing 3. Ok you can't use the I5 650 it not a lga 775 cpu q9550 is good but you can get better performance it you over clock it 4. the power supply i would upgrade maybe to 500 if you are not gonna over clock then it ok to use

 

[Sha D Cl1]

Thank you for the answer, If I'm gonna over clock it I guess i'm gonna need a new more powerful cooler too right ?

 

[Pentium4User]

Thank you for the answer, If I'm gonna over clock it I guess i'm gonna need a new more powerful cooler too right ?

It should be good just make sure it doesn't get super hot, if it a copper core most core 2/quad came with copper core then it better i'm still using stock intel cooler that aluminum and it sits around 60/70.c overclocked just make sure you put new thermal paste and good luck with your build!!

 

[Sha D Cl1]

I understood, thank you again !