so i oc'ed my E8400 to 3.3ghz (fsb=363mhz if im not mistaken)
i was wondering what would you call a sweet spot for this CPU, in terms of not going on extreme overclock. what i mean is, i don't intend to use an aftermarket cooler, so how far can the OC go on the stock cooler without losing stability?
i used RealTemp and played half an hour of the newest BIA game, max temp was 57ºC. time to stop or can i go up another notch?
uh, don't just play a game to test temps and stability. Download prime95 and run it for 8+ hours to insure full stability. This will stress your cpu and give you your maximum temperature. As for how far you can go, you wont be able to achieve a high overclock with the stock cooler due to temp restrictions. I like to keep my processor around 65 at full load, absolutely no higher then 70.
If you want to get a good overclock out of your cpu then you will have to get an aftermarket cooler. Thats just the way these things go.
My E8400 has been at 400MHzX9 since I bought it the week they came out. Temps idle in the mid 30s and Prime 95 torture tests max out at 61C. But that is all with an Arctic Cooler 7 Pro. On the stock cooler I think you have made some pretty nice gains there! You could push it a little further (70C stated above) but on stock, I would be really happy if I got where you were.
ALSO, make sure you understand which temp you are looking at.
If I recall correctly the tCase max for the e8400 is 105C yet at least one of the temp monitoring utilities (can't remember if it's realtemp or coretemp) has the tCASE set to 95, and all the temps it displays are 10 degrees out.
I overclocked my e8400 the week it came out, so I can't remember all the details....
I have an e8400 (e0 stepping) paired with a DfI DK X38 t2rb mobo. I've gotten it stable in prime for 10+ hours at 4.19ghz (466x9) and prime stable for 1hr (when I stopped it) at 4.26ghz (474x9). Though by then I was getting close to Intel's stated limit for vcore for the wolfdales: 1.3625v (do not exceed this voltage unless you have serious cooling and are willing to risk killing your cpu). I was using a Thermaltake Big Typhoon cooler. At the highest OC I was hitting 62c tcase.
I was also able to hit 3.8ghz while only upping FSB and keeping ram speeds low (aka no voltage bump and setting ram to 667 isntead of 800 spead).
A couple things to consider when you OC, 1) how high do you want to go? if you are thinking of 4+ ghz you will probably want to get DDR 2 1066 ram or you will need very good ddr 2 800 ram that has a high OC potential. Otherwise ram will get in your way. Also, the higher you go, the more you have to increase voltage, and heat increases exponentially with voltage increase. 2) If you are looking for a modest OC while maintaining some of Intel's nifty power saving features, I suggest going for no higher than 4.0ghz. I found that above 4.0ghz I had to disable the power saving features in order to maintain stability. Also your chip will like you more and probably last longer with a lower OC since you won't be pushing it so hard.
Incedentally, best prime95 test for cpu stability is the small fft.
Happy OC'ing and don't hesitate to ask more questions when you have them.
Currently im prime 95 testing my 8400 (Xeon e3110 version) at 3.5ghz 389 fsb i think, on stock voltages and seems to be doing alright. my ram is corsair xms2 ddr800 overclocked to 1000mhz 5-5-5-15 timings (2.1v for ram as that is what is stated to run it as from corsair). temps for cores are hanging around 55C and 50 C respectively max using arctic freezer 7 pro, little to no increase from 3.38ghz. previously i ran my cpu at 3.38 ghz no problems at all for several months, now trying to see how much i can get without raising voltage and keeping power saving options on.
edit: my fan speed isnt even 100%. its 81% according to speedfan during this prim95 test. i have it set in bios to auto adjust once my cpu reaches a certain temp. occasionally during this prime 95 ill hear my cpu fan speed up a bit more but it wont last but a minute or 2 then go back down. on idle my fan is around 60%