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What to expect out of a Q8400? - Page 2

post #11 of 34
As an experienced overclocker of the Q8xxx series. I can honestly say, that most Q8xxx don't overclock as straight forward as you'd think. Most of them hit a vcore wall at very low clock speeds ~3.2Ghz. From which it takes .1v extra for just 100Mhz. Or worse.

Some reach higher clocks but those are the golden chips. Don't expect anything beyond 3.2Ghz and you're good to go. Otherwise, you're a lucky guy.


EDIT: I'd pick a Q9xxx and a mobo that can reach atleast 450FSB. Low multipliers are a pain in the...
Edited by Xenthos - 10/27/11 at 9:13am
post #12 of 34
If your going to upgrade a 775 save abit more and get the Q9550. It will last you a LOT longer in terms of future performance capability than the Q8400.

EDIT: holy @$@% the Q9550 is expensive now.

If you cant find it for less than $150 then I guess your stuck with a Q6 or Q8400
Edited by Aparition - 10/27/11 at 9:15am
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post #13 of 34
Don't believe the negative talk about the Q8400, it's a great little cpu for the money and it overclocks well if you know what your doing.I hit 3.8ghz on my Asus p5k and 4.0ghz easily on my UD3P at 1.36v (check my cpuZ validation).You should have no problem getting 3.2ghz on default vcore.Let me know if you need any help with settings
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post #14 of 34
Quote:
Originally Posted by Despair View Post
Well, I can't find a new in the box Q6600 for **** and i don't want a used one. Now i know why there are so many new Q8400s still on the market . But it's pretty much all I'm gonna able to afford lol...a Q8400 is what I'm gonna have to settle with. I'll be happy with 3GHz I guess. Is Q9505 worth it? It's listed on newegg.
NIB? NIB means diddly squat for a Q6600, or any of the Core 2 series at this point. I'd rather find a cheaper used one that has proof of good overclocking capabilities.
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post #15 of 34
Quote:
Originally Posted by slip7777 View Post
Don't believe the negative talk about the Q8400, it's a great little cpu for the money and it overclocks well if you know what your doing.I hit 3.8ghz on my Asus p5k and 4.0ghz easily on my UD3P at 1.36v (check my cpuZ validation).You should have no problem getting 3.2ghz on default vcore.Let me know if you need any help with settings
Says the guy with a UD3P.

He'll get further with a Q6600, but his power phases might croak.

May as well see what the Q8 can do on there, but I wouldn't expect much unfortunately.
Edited by 2thAche - 10/27/11 at 6:30pm
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post #16 of 34
Get a really good cpu cooler (that can mount to other socket types) if you dont' have one already and make sure the mobo gets good cooling too.
I had a great 780i/q9650 rig, but an inexpensive Sandy Bridge quad will blow it out of the water.

Good luck!
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post #17 of 34
i'm pretty sure a multi-threaded i3 will smoke a Q8400 at this point, and it should be the same price, give or take $30. go with that, you won't be disappointed. i was actually surprised at the speed my dad's i3 got on his prebuilt computer of all things. i'm pretty sure it was faster than my phenom II 940 OC'd at 3.6GHz just judging by responsiveness.

not to mention DDR2 got really expensive so the money you'll save on the mobo and processor you'll end up paying for in the memory.
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post #18 of 34
the gigabyte GA-P45T-ES3G will do 1600FSB natively so 3.2ghz is no problem for the Q8400 on that board (8x400),plus it takes DDR3 up to 1600mhz so memory definitely won't hold you back.It's really the best choice for a new 775 board with warranty.I agree the power phases will prevent any major overclocks but 3.2ghz is easily doable and I would expect 3.6ghz is possible (8x450).Good luck and let us know how it goes!
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post #19 of 34
I have flogged my Q8200 2.33Ghz. I can boot to 3.40, run at 3.33 but it is not stable at 1.45 vCore, and 3.20 is stable at 1.40 vCore.

And the stock cooler is horrible. I use it as a paper weight. A Tuniq 120 keeps me under 55C.
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post #20 of 34
Quote:
Originally Posted by slip7777 View Post
Don't believe the negative talk about the Q8400, it's a great little cpu for the money and it overclocks well if you know what your doing.I hit 3.8ghz on my Asus p5k and 4.0ghz easily on my UD3P at 1.36v (check my cpuZ validation).You should have no problem getting 3.2ghz on default vcore.Let me know if you need any help with settings
Srsly, you just got a golden chip.

If 7+ people say the Q8xxx isn't great for overclocking and you claim it's great. It's more likely that you were lucky with your chip and this is not a standard event.

I owned 6 different Q8xxx CPUs and most didn't pass 3.2 - 3.3Ghz without running on extreme voltages.
Edited by Xenthos - 10/28/11 at 8:51am
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