Upgrading a Intel Core i5 750 2.67GHz which cpu do i get?

The I7-2600k is the best processor out there right now. You will need a new motherboard as well since it is a Socket 1155 and your current MB/CPU is 1156. You have a pretty potent CPU already though. It is extremely overclock friendly. Have you thought about spending 30 bucks or so on some aftermarket cooling like the Hyper 212+ and trying your hand at it? The I5 750 and 760 are notorious for having a lot of overclocking leg room.

Agreed. I guess the best question would be, what piece of software is running so slowly that you feel you need an upgrade?

oops meant ps2 emulator lol.
What kind of cooling do you recommend, at the mo ive got 2 fans on the side, 1 bigger fan at each end and theres a big block of the cpu. not sure what kinda colling the big block is, i want to try and avoid water cooling at all costs.

i've 4GB at the mo.

SSD?

can i take a picture of the cpu coller and upload here for you guys to look at? will that help?

i haven't done this.

Thanks for all replies so far, this is really helping as i'm nervous about upgrading the pc as it is :S

4 case fans should be more than enough. Especially if you don't have a lot of graphics power creating heat. The 2600k wouldn't be overkill for you in your application. Overclocking is pretty easy. Just up the Bclk, lower the Ram ratio to keep it within spec, and add voltage to the Cpu Vcore as necessary to keep it from crashing your system. You can get a mild overclock (10%) without messing with voltages probably. Anything more than that will probably start requiring bumps to the voltage. It's not a bad time to try your hand at overclocking since the worst you can you is kill your CPU, assuming you don't mess around with a bunch of the other voltages, which you are looking at replacing anyways. I like the Coolermaster Hyper 212+ as it's cheap and effective. You can hop over to frostytech.com for a list of better coolers and reviews if you want something more potent.
Here's a link to a overclocking guide.
http://apcmag.com/overclocking-101 [...] htm?page=1
Worst thing that happens is that the overclock doesn't satisfy you and you end up with a cooler that is compatible with an 1155 system that will run cooler and quieter than the stock heat sink.

Where did you buy the computer from? It sounds like you might already have aftermarket cooling which is common at a lot of boutique sellers.

The i5-750 isn't that hard to overclock. You should be able to get between 3.5GHz and 3.9GHz out of it. I've built 3 of them, 2 I got to 3.9GHz pretty easily, the third one was only reliable at 3.8GHz, and I'm not an expert at overclocking that chip.

i open it and saw writing on the fan of the block it said Freezer Pro 7 Rev.2 with the arctic cooling logo

Check you temps before you over clock, a picture of your cooler might help.
I thought you might be interested to know that I have the same CPU @ 3.6GHz, I get a pass mark of just over 6000.

Proof

You might want to clean your pc, especially if the heat-sinks are blocked

thanks you that is helpful to know i could overclock to that much
i'll get a picture up tomorrow for you all to see just so i know i'm doing the right thing. ive linked to sites with the stock pictures of it.

http://www.arctic.ac/en/p/detail?sArticle=4.%3F
http://www.amazon.co.uk/Arctic-Coo [...] B002G392ZI
http://www.overclockers.co.uk/show [...] =HS-035-AR
http://www.tomshardware.com/review [...] 535-3.html

also thermal paste dont dry out does it :S as this is a second hand pc...

so with this cooler how high would you go? like 3GHz?
i was asking about the thermal paste as im nervous about going anywhere the cpu, i tried to build a pc a few years back and never installed the cpu right, it kept crashing, blue screen of death etc... Thanks

Just try a BCLK of 166 first like in this article then run prime 95 for a couple of hours and check the temp, if they are too high or if the computer crashes then just lower the BCLK. If your temps are fine and you have headroom then increase BCKL

Asus boards have the feature. It should be on the MB software/drivers disc. It's called ASUS Turbo5 and is a program that runs in windows. I prefer the bios solution myself but if you don't want to be bothered with the hassle software solutions are a lot easier to navigate. Here's a link to the MB manufacturer page in case you don't have the manual or cd. I've never used Turbo Key but it has that functionality as well. All up to you really.
http://www.asus.com/Motherboards/I [...] 7H55M_PRO/

I prefer BIOs to turbo.

They have an option called "Intel SpeedStep" in the bios - make sure you enabled this, it will automatically adjust the CPU speed. My CPU only goes to 1.6GHz while only using a web browser.

It will adjust the speed to your maxing out at whatever level you overclocked your CPU. This will be helpful unless you actually utilize 100% CPU usage for those 12 hours.

I agree in principle with what you guys are saying about overclocking. BUT........its not everyones cup of tea for a variety of reasons. At least not traditional reference clock overclocking. I will overclock the hell out of an unlocked multiplier. I don't like messing with other settings though. Perhaps the poster falls into this category.

If so, and you were to pursue the new processor route, I would suggest the Intel Core i7-875K. Its the same socket you currently use, so no money wasted on a new board. It has an unlocked multiplier, so its super easy to OC, no matter how squeamish overclocking makes you. You just increase the multiplier as high as it will let you go. If you make a mistake, no harm done as long as you don't increase voltage. 4 ghz or close should be obtainable on stock voltage.

Whichever direction you choose, I see no reason to change boards. At this juncture, there is not enough advantage in the newer chips to justify the added expense.

well ive got the same cpu as you but i haven't overclocked it so would you recommened i use this feature aswell? when its on over night its just literally a torrent program and maybe jdownloader running.
then for the rest of the 12 hours i might have a game or 2 and watch HD movies.

An overclocked cpu with a good aftermarket cooler can run cooler than a cpu running at stock speed with its stock cooler.

Speedstep helps because it lets the cpu run slower when not under a load.

Use this article. It tells you exactly what to change. BCLK and Vcore are the to things that are primarily messed with. If your NorthBridge gets above 2500 change the HT Link multiplier to a lower number or bump the voltage a little bit of the NB. Temps are tested via Prime95. The only thing that matters before you test temps is that it boots to windows. If it doesn't or you get a lot of artifacts or strange operation either lower the BCLK or raise the Vcore up to but not higher than 1.4v. That's my own safe spot for 45nm processors. Check temps with HWmonitor while running Prime95. That front temp display is case temperature. You should be looking at a Max of 75C while stressing it and 60-65C during your normal use.