E8400 or E8500?

well at the end of this year I'm going to go Quad again. But I want a chip that can hit 4GHz on air and maby a little more. My question to you is. Should I buy the E8400 or the E8500? I have the E8400 in one machine but it is CO stepping and I want a EO stepping so how do I tell if it is EO and not CO? I would love the E8600 but for the price I don't think it's worth it.
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More about e8400 e8500
  1. When shopping for the box processor look for :

    E0 - SLB9J
    C0 - SLAPL

    Most all C0 by now are gone from most stocks. If you have a local shop like Fry's, Microcenter you should look at the product before you make the purchase.
  2. If your goal is 4GHz it may not matter E8400 vs. E8500, but I would start with the E8500 just for the slightly higher multiplier. That way it's a little bit easier on the ram and the mobo. Consider that the E8500 with the mobo set to 400MHz is running at 3.8GHz, and this is right at the rated speed for 800MHz memory.
  3. I was thinking of the E8500 and now I'll think I'll get it. I'm going to be using my DDR2 800 MHZ for now till I can afford DDR2 1100 or 1066.
  4. i got my E8500 at 4.2/4.3 on air. runs at ~ 50 on full load max FPU stress on prime95. though im sure you could reach that with an E8400 as well.
  5. what is the max frequency you can get out of both CPU's?
  6. Every processor will vary, but it seems that 4.2 or 4.3 on air cooling is pretty much the limit that you could expect. I bought the E8500 for my office and didn't want to spend a lot of time tweaking/stressing/testing it so I just set it at 3.8 right off the bat and it runs fine. Not many people will tell the difference between 3.8 and 4.2 anyway, although we certainly can with our CAD apps. If you want to go to those speeds you might even consider water cooling.

    I know very little about overclocking RAM but you might be able to get to 4 or beyond with your 800mhz ram.

    My machine at 3.8GHz ran SuperPi1.5 1M in
  7. As I was saying- at 3.8GHz it ran in 12.4 sec. At stock speeds it ran in 14.8 sec. I've read that the fastest LNO cooled machine at something like 7GHz ran it in right at 7 sec.
  8. i got my e8400 up to 4.140 on air (the temps hti 70 under load which is a bit hot, but fine by me). As has been said it depends on the chip but chances are you will be able to get both the e8400 and the e8500 above 4GHz on air
  9. dude i can get me E8500 up to 4.6 easily but that would mean raising the vcore above 1.36.

    i just recently re applied my thermal paste and switched my ram and holy **** can these wolfdales overclock like nobodies business.
  10. Then I could probally expect the yorkfield's to do about 4GHz when I get a quad at the end of the year. I'm hoping for the Q9650 drop about $200 to $300 by the time I get one.
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