Anyway mates, after we determine our oc settings stable after (doesnt matter Prime95,OCCT, Orthos) few hours of stressing, can we enable CIE,CIA2 and EIST ? Any chance of causing instability ?After enabling back do we have to stress it again just to make sure its safe ?

That was what happening to me just now,after saving the settings and apply after restart, I couldnt go into windows with PL7, and it kept freezing after loading windows, at last I just reset everything in bios, start from scratch. Even PL8 only takes me to 3.8ghz.

Btw here's my latest ss -



Its 1.25v in BIOS, at last I have to increase the vcore from stock. Anyway does anyone know the stock vcore for E8400 ? My bios default is 1.235v. Think this is sweetspot of the proc under low voltage, after this will try out with 2.40B.

for C1E, shouldnt be a problem in most cases... mild OC hardly cause problem when C1E is turned on... as for EIST, its automatically disabled once u manually set the vcore and multiplier... EIST is controlled by the OS, u can alter the settings in Power Options... as for CIA2, i don't know what's that -_____-

So I can turn on the C1E then. Didnt alter the multiplier, just undervolt (but still considered as manually set). So do you suggest me to alter by Power Options or just leave the EIST, turning on only the C1E ? As for CIA2 I'll try to figure out what's that coz I remember I did disable it.

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Added on July 21, 2009, 8:30 am

shouldnt bother too much about performance levels i guess... from what i see in benchmarks, they dont give overall performance boost... PL8 @ 450fsb 1500MHz easily pwns PL7 400fsb 1600MHz when i ran everest memory benchmark

btw stock vcore for each proc is generally not the same... but most are within your VID

my E8400 E0 @4ghz 1.233v around 45C on Sunbeam CCF. is it normal? or a little bit too hot? I cant street my cpu by orthos for 2minutes with tht settings.. my ram is Kingston Hyperx 4GB with setting 1000mhz 5-5-5-15 2.08v... Mobo is Tpower i45..

Anyway mates, after we determine our oc settings stable after (doesnt matter Prime95,OCCT, Orthos) few hours of stressing, can we enable CIE,CIA2 and EIST ? Any chance of causing instability ?After enabling back do we have to stress it again just to make sure its safe ?

Now i set my fsb to 460*9 1.288vcore... stable.. idle 52C under non-aircon... I wan to ask tht the highest safe vcore of E8400 E0 is? And also wad is the temperature limit? 80C ++ still safe? (when full load)

Halo guys~ im new here and also xiong91's fren
we r doin our E8400 recently 2gether too
i oso got an E8400 wif Asus P5e X38
im using Acbel M8 750w modular psu and Ram is HyperX 4gb
currently i oc my E8400 till 4.2ghz wif vcore at 1.325 and vdimm at 2.1 setting
i oso tested orthos for  1 hr...it was fine n stable
but once i check my cpu's status thru cpuid
it shown my vcore at 1.27xx-1.28xx(max)
although it is 4.2ghz...when i play Grid on High Reso
it'll lag or black screen sumtimes...
actually wat happen? is it not stable?
need u guys' guidances 


here is my cpuid 

I forgot to ask this question,

well my OC seems to be fine in terms of Prime95 test, temperature and many more.

But i noticed that when I OC, when I wanna switch ON the PC, it took about 3 seconds to power up.
Any idea guys?

I've used quite a number of LGA775 boards and I don't think there's an issue because it would always have a few seconds delay during power up.

ok later i show u the stability....i`m working right now....