Tom's Hardware > Forum > CPU & Components > CPUs > E8400 issue?
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hey guys ... in cpuz it says my e8400 runs at 2003 mhz then bumps up to 3 ghz every so often?? shouldent it be at 3 ghz all the time? is this speedstepping?

also (this is a new build btw) the ram i bought is 4-4-4-12.....but my mobo put it to 5-5-5-15...should i leave that or change it to 44412? thx in advance guys

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Yeah that's EIST in action. It clocks down and undervolts when idle to save power and reduce heat output then reverts whenever there's sufficient load. You can select the always on or home/desktop power profile and it will stop or you can completely disable it in the bios.

NEVER run RAM at auto settings. Get in that bios and set the timings and voltage manually.

Reply to modtech

mobo's have a habit of doing that to RAM
your CPU is fine, speedstep is all it is. But really, 3? that sounds one whole number too low for my tastes.

Reply to themyrmidon

should i take sppedstep off?? is it a big deal ...what about when i have it OC to 4 ghz and speedstep is off? too hot? thx

Reply to sean1986

also whats the best voltage to run my e8400 at?? at the stock clock of 3 ghz

Reply to sean1986

Same as VID then start lowering it while testing with P95/intelburnin/occt to find the lowest stable voltage (if desired).

Reply to modtech

I am able to OC my 8400 to 4.0 at 3.50 and leave EIST and the other cpu features on....

------------------------------ Q6600@3.6(9x400)Lapped Abit IX38QuadGT,TRUE 120 Lapped,Vista Ultimate 64bit,Gigabyte HD 3870 OC'd to 860/2250 w/ Zalman Fan,4x2GB G.Skill PI-Black,CM690 w/ 5x140m 3x120m fans,Idle 28c load 42c-Corsair HX620w
Reply to xringx

Don't you mean 1.350v?

Reply to modtech

I would leave Speedstep on. It wont hurt anything but will save you on power and lower your temps when idle.

------------------------------ http://www.steamcalculator.com/76561197970703804/camo_sig.png
Reply to jimmysmitty

DOH!! Yes, I mean 1.35!!

Sorry, nice catch

------------------------------ Q6600@3.6(9x400)Lapped Abit IX38QuadGT,TRUE 120 Lapped,Vista Ultimate 64bit,Gigabyte HD 3870 OC'd to 860/2250 w/ Zalman Fan,4x2GB G.Skill PI-Black,CM690 w/ 5x140m 3x120m fans,Idle 28c load 42c-Corsair HX620w
Reply to xringx

Ive left Speedstep on , both e7200 OCed to 3.2 and E6600 at 3.2. Fundly enough the E6600 actually idles at 2.4 (its stock speed) when speedstep is working :S

3.5 would fry they **** like an egg


Message edited by chookman on 09-03-2008 at 01:22:32 AM
------------------------------ "This thread made me strap on my lolerskates and head for my roflcopter."
Reply to chookman
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