LGA 775 FSB questions

I am officially on an LGA 775 buying spree. It started when I bought a DQ965GF + C2D 6320 + (1x) 2GB 667 DDR2 CPU/motherboard/RAM combo for $30 off ebay (link). Then, I upgraded the CPU on that board to a Q6600 that I got for $36 (link) and added 2GB of 800 MHz RAM for $14 (link x2). Now, I just pulled the trigger on an ASUS P5K-V GREEN + E6850 CPU/motherboard combo for $33 (link). So now, I have 3x CPUs and 2x motherboards for a little over $110. I also have 2 more GB of DDR2 in another old PC with a Pentium 4 650 and a useless motherboard that can only handle single core CPUs. My plan is to use the Q6600 in the P5K and OC it by simply increasing the bus speed to 1333... unless someone can suggest a better way to OC it? I am using a 212 Evo. And I want to use the DQ965GF and one of the C2Ds to replace the single core Pentium 4 as it is a micro ATX case. It will be a PC for my mother. But, my main questions are what should I do with the DQ965GF? Specifically, which CPU would be better in it, the 6320 or E6850? Will the E6850 even work in it? From what I have read, if it does work, the E6850 will be forced to downclock from its native 1333 FSB speed when used on a 1066 FSB motherboard. Will I have a faster overall PC with the 1066 FSB, 1.8 GHz 6320 or will the E6850 still have a higher clock speed running at 1066? I am not sure how to calculate the CPU clock speed when you switch to a different FSB. Also what will the Q6600 be running at when it is using a 1333 FSB?

TY for your answer. I am not increasing the FSB on this PC, I am leaving it the same but using a CPU with a higher native FSB. I don't think that I need to worry about RAM, NB or even PCIe clocks. Also, I can't adjust any settings in the DQ965GF because it is a locked BIOS - Intel typically doesn't include OC'ing options in the boards they produce unlike most of their vendors. I looked up the multiplier of the E6850 and it is 9x (no need for CPU-Z, someone else did for me in 2008). The DQ965GF has a FSB of 1066 so the BCLK is 1066/4 = 266.5. If I put the E6850 in the DQ965GF, it will run at 266.5 MHz * 9 = 2,398.5 MHz. Any of that look off? At 2.4 GHz, that is still significantly better than the 1.8 GHz C2D 6320. I guess that it should work since it is a 65nm CPU. If not, my mom is stuck with the 1.8 GHz 6320 until I can find her a suitable cheap 1066 FSB C2D with a higher clock speed. That shouldn't be hard - most C2Ds are under $20 now, some under $10.

I see... the 8350 is a beast. I actually went from a 3770k + GTX 660 SLI + Sabertooth Z77 to this Q6600 which is currently running in the DQ965GF + an HD 7950 boost after selling the 3770k, both GTX 660s and the Z77 board a few months ago on ebay for almost as much as I paid for them in 2012 (only because I bough almost all the parts with coupon codes or rebates). Even at stock 2.4 GHz, the Q6600 combined with the 7950b are running all my newest games at 30 FPS or higher with maxed out detail in 1080p. Some games even run better than on my 'old' $1200 3770k PC because the 7950b's superior 3GB 256-bit GDDR5 vs the 660 SLI's 2GB 192-bit GDDR5. The last three games I got, Wolfenstein, Watchdogs and Thief all run smooth in 1080p with maxed out settings. I'll eventually upgrade to something that came out in the 2010's but not for several more years especially since I am only using it for games. With all the 2nd hand parts floating around ebay these days, there is no reason for gamers to need to buy newer parts. After the litecoin mining crash, you can find AMD GPUs for crazy cheap. I just saw a R9 280x that was brand new 3 months ago selling for $160 shipped. The same card was $400+ in January and is $300 retail. People who hoarded them are desperate to get rid of them because they never got a return on their investment. 1156 and 775 Intel parts as well as early AM3 parts are crazy cheap and their performance isn't that far behind some of the latest quad core parts. People are just turned off by them because they can't produce the high benchmarks of the newer parts but when it comes to games, it doesn't really matter as long as you have a halfway decent GPU. That 7950b is running on PCIe 1.1 x16 and I am only losing around 2% as opposed to if I were running it on PCIe 3.0 x16. The new Asus board I just ordered should allow me to extend the life of this Q6600 even further by OC'ing. Seeing that it can still run the newest games in ultra even as a 7+ year old CPU, I think games should still be playable on it well past its 10th birthday although a GPU upgrade should be due by then. By then, though, I'll probably be looking at a Haswell or Ivy Bridge i5 and a B- or Z- series motherboard + DDR3 combo for less than $50 while everyone else is dropping thousands on the latest DDR4 systems. That 3770k is the last "latest and greatest" PC rig I will ever build for myself. From now on I will only get parts that are the perfect combination of just old enough that nobody wants them so they are mad cheap and still fast enough to play the newest games and be compatible with the latest tech such as PCIe and SATA for GPUs and SSDs.

You will be lucky indeed if a 1333 fsb c2d works in a board biosed in the 10666 days. I doubt the bios will have voltage or other specks for it, and may just refuse to post. It may actually run at the lowest speedstep multplier. It may confuse the drok out of the bios and brick the board.