8400 to 4gz?

[Aryder]

Just wondering if anyone here has gotten an 8400 to 4gz and what your specs were. Im waiting on mine to get here and plan to OC it to 4gz, i'll be using the Gigabyte GA p35 motherboard with 2x2gb g.skill ddr2 1000. I currently have the zalman 9500 or 9700..(can't remember i got it so long ago) but am thinking about upgrading to the Vendetta 2 if need be.
Any advice on the matter would be great. (voltages and what not)

Thanks

 

[myocardia]

Yes, the majority of them will do 4Ghz, but most people are running them a bit slower, for 24/7 use.

 

[bdubyah]

i've got mine running at 4ghz right now, haven't fully tested it yet. i think i'm at 1.375v in the BIOS, but i think i can get it a little lower. as i said, haven't finished testing yet. my temps are a little high atm, but i've got a bolt through kit for my S1283 and i am fixing to lap it. see how everything goes after i am done.

 

[Aryder]

Cool, lemme know how that xigma does because i'll prolly end up buying another hsf.

 

[Quiksilver]

Originally posted by: bdubyah
i've got mine running at 4ghz right now, haven't fully tested it yet. i think i'm at 1.375v in the BIOS, but i think i can get it a little lower. as i said, haven't finished testing yet. my temps are a little high atm, but i've got a bolt through kit for my S1283 and i am fixing to lap it. see how everything goes after i am done.

I don't see how lapping a exposed heatpipe cooler is going to give you the results you would be expecting. I mean with other coolers that have copper underneath the nickel plating, lapping those would improve temps due to copper being a better heat conductor than nickel but here your already sitting on that copper. so...

 

[Tempered81]

It may make it flatter... but he probably would be better off lapping the IHS

 

[OCGuy]

With these chips, the question isnt "Can they do 4ghz+?" The question is "What is the maximum voltage I am comfortable running through my 45nm for 24/7 use?"

With a less than halfway-decent board, you should be able to hit the 445 FSB no problem. However, I know with my chip, I need basically 1.4V to run it stable. That is just too much for my liking. You may find your chip requires less. I have seen some E8400s stable @ 4ghz in the low 1.3X, I wasnt so lucky with my chip.

 

[imported_ST]

Originally posted by: Ocguy31
With these chips, the question isnt "Can they do 4ghz+?" The question is "What is the maximum voltage I am comfortable running through my 45nm for 24/7 use?"

With a less than halfway-decent board, you should be able to hit the 445 FSB no problem. However, I know with my chip, I need basically 1.4V to run it stable. That is just too much for my liking. You may find your chip requires less. I have seen some E8400s stable @ 4ghz in the low 1.3X, I wasnt so lucky with my chip.

well said!

 

[ther00kie16]

Yea, my friend got a e8400 that does 4ghz on 1.28V. Lucky him.

 

[Caminetto]

Yes, luck of the draw to 4ghz.
I needed 1.325v just to get stable @ 3.6.

 

[bdubyah]

yeah, i worded that wrong, i meant the chip, not HSF. just put it back together, temps are a little lower, not much, but i think the screws need tweaking, possibly need to reapply AS5. i couldn't get it spread like i wanted it.

 

[imported_ST]

Originally posted by: bdubyah
yeah, i worded that wrong, i meant the chip, not HSF. just put it back together, temps are a little lower, not much, but i think the screws need tweaking, possibly need to reapply AS5. i couldn't get it spread like i wanted it.

You shouldn't be "spreading" the as5, just do a vertical line.... http://www.arcticsilver.com/in...ute_step2intelas5.html

 

[Zenoth]

Mine does 4GHz, I've made it there and it was stable, but for that it needs way too much voltage, I needed 1.48v for that, no thanks, back to 3.74Ghz, but even then at that speed I still need 1.36v and an extra +0.3v on the FSB along with +0.2v on the Northbridge. I blame my Motherboard for that poor OC'ing performance, and maybe also the CPU itself, perhaps a bad batch... that wouldn't surprise me, I've NEVER got a single good batch for any CPU's I've ever owned. And then maybe my PSU sucks as well... not sure.

All those people hitting 4Ghz without extra voltage on the FSB/MCH and with a vCore below 1.4v are just lucky if you want my opinion, or they really need to convince me changing from Gigabyte to another brand even though it was the first time I ever tried Gigabyte, and I'm not quite certain if I'll try them again on my next big upgrade.... bah...

 

[RamIt]

Took 1.22 to get stable @ 3.6. Under load the vcore drops to 1.17.
Not going to even think of going over 1.35.
3.8 took 1.35

 

[bdubyah]

my gigabyte board hasn't given me any problems since i bought it last october/november. had a Q6600 running 3.4-3.6 on it till a week or 2 ago when it crapped out and now i'm running an e8400 at 4ghz, might try to push it and see where it tops out at. think 4.2 might be feasible.

 

[tr1kstanc3]

on my dfi bloodiron t2rl i needed 1.24v (cpuz) to run 4ghz. i have the xeon 3110 (similar to 8400).

 

[GullyFoyle]

Originally posted by: ST

Originally posted by: bdubyah
yeah, i worded that wrong, i meant the chip, not HSF. just put it back together, temps are a little lower, not much, but i think the screws need tweaking, possibly need to reapply AS5. i couldn't get it spread like i wanted it.

You shouldn't be "spreading" the as5, just do a vertical line.... http://www.arcticsilver.com/in...ute_step2intelas5.html

Their standard procedure is fine for a normal smooth-bottomed heatsink, I'm not so sure for a direct-touch cooler like the xigma. The AS5 might not spread past the gaps between the heatpipes too well.

 

[bigpow]

I need 1.405V to push mine to 4G, 1.38V with Vdroop
35C at idle, 60C at load
but idle vs load time is like 99% vs 1%

 

[FormulaRedline]

This seems strange to me. I got my E8400 almost 4 months ago on the day they came out. I'm at 4.05GHz at 1.3X volts (I'll have to go home and see what it actually is) with 24/7 stability easily. I could probably back the voltage off even more and be just fine. The tough part was trying to get to be stable above that. I never managed it in my limit attempts, but other people at the time were getting up to 4.2 and 4.3GHz. Were the first round of them that much better than the current ones?

 

[bfdd]

Originally posted by: Ocguy31
With these chips, the question isnt "Can they do 4ghz+?" The question is "What is the maximum voltage I am comfortable running through my 45nm for 24/7 use?"

With a less than halfway-decent board, you should be able to hit the 445 FSB no problem. However, I know with my chip, I need basically 1.4V to run it stable. That is just too much for my liking. You may find your chip requires less. I have seen some E8400s stable @ 4ghz in the low 1.3X, I wasnt so lucky with my chip.

See I need more than 1.4v to get stable at 4ghz+ on my CPU, depending on ambients I will drop to 3.6ghz cause I require just over 1.3v for that to be stable.

 

[MKvolunteer]

I must be very lucky. I'm on 1,295v for 4.05GHz in HWMonitor. Core t is <49C with EK w/c + 3rad. I don't think I'll push it for more.

___________________________________________
Intel E8400 @ 4050 MHz (450x9) w/EK, 3 x rad
Asus P5E3 X48 Premium
2GB Corsair Dominator 1800 MHz DDR3
NV 8800 GT 512MB
Samsung 1TB SP F1

 

[Psynaut]

I run at 4.1 Ghz on 1.24 volts.

 

[akhilles]

4ghz at 1.45v. Mobo undervolts. Actual is lower. 24/7. 19-47'c. See sig.

 

[Zapper48]

4.0 ghz at 1.375 in bios. (500x8) 24/7

 

[SimMike2]

Do these things run hotter than snot? Right now I have an 8400 in an older Gigabyte 965P DS3. The core temp is 45C or even higher idle, and 55C or even higher stressed. This is with a good Artic Freezer cooler that kept my previous 4300 about ten degrees cooler, even when overclocked to 2.88.

Right now I have it stable at 3.6 with core setting of 1.25, which translates to around 1.22 according to CPU-Z.

Even when I was running this at stock settings, it still ran hotter than snot.

Maybe it isn't giving the correct temp to the system?