What should i compare when comparing processors?

What's better i high end intel i5 2500 with 3.3 GHz or a low end i7 920 with 2.66 GHz, and if the high GHz i5 is better then why is the i7 920 more expensive. My 3 year old computer is saying it has an intel core 2 duo at 2.8 GHz, which is higher than this fancy i7. How important are the GHz compared to other attributes when comparing which processor i should buy for my build?
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More about what compare comparing processors
  1. read the charts section of this site .

    Tab ^ there

    CPU designs change and get improved .
  2. You need to ignore the ghz rating as it went out the window years ago. These days it is more about cores, and hyperthreading and instructions per clock cycle, etc. In other words, newer tech of the i5-2500 vs. the older tech of the others.

    Right now, anything other than socket 1155 or socket 2011 on the Intel side is essentially a "dead platform". This means you can still buy it, but you will not have much of an upgrade path, if any at all.

    It also depends on what you want to do with the machine. It it strictly gaming? Only for heavy video or photo processing? CAD, 3D modeling? All these will determine the best processor for you along with your budget.

    As to older chips being more expensive, it usually happens that the new stuff is less expensive and faster than the old. Just the nature of the beast. Why some vendors do not mark down the old in price and move them out has always been beyond me.

    You can always view Tom's charts and others around the web to see where a particular CPU, or GPU for that matter, rate in the scheme of things.
  3. ok thanks, i just want to make sure i get a good motherboard and thus a good processor so i dont have to upgrade either one anytime soon and have to buy a new OS disk
  4. Right now socket 1155 is the best bet. If you do not plan on overclocking, you can drop to the i5-2400 and save some money. Only 10% slower at stock speed than the 2500. For overclocking, the i5-2500k is the best choice.
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