No OC for my E8400

[russcrypto]

Can't figure out what's holding my E8400 back. I recently upgraded from an E6750 that I had running stable at 3.4GHz with a vCore of 1.3. After replacing it with my newly purchased E8400, my machine has gone haywire. I haven't been able to OC via the BIOS at all. It won't even post unless I leave the settings at factory default.

Specs:
MoBo - Gigabyte GA-P35-DS3R rev. 2.0
RAM - 2x Corsair TWINX2x2048-6400C4 (4GB total) 4-4-4-12 800MHz @ 2.1V (factory ratings)
PSU - Enermax Liberty DXX 500W
HDD - 2x WD 250GB (striped) 2x Seagate 320GB (striped)

I was able to achieve 3.6GHz using EasyTune 5 Pro, but I'm really wanting to hit 4.0GHz with this CPU (this is the whole reason for me buying it).

Any help would be much appreciated.

 

[Technophobe]

So does this mean you can only get to 3.6 from Easytune and not from BIOS? If so, I would reset your CMOS settings and load optimised defaults and start from scratch again. Smal changes only at a time and test in-between each change.

 

[Evilonigiri]

Use bios level OCing, OCing through windows will not give you the best results.

 

[outlw6669]

Have you updated your BIOS to the latest release yet?
The new CPU may not be fully suported by your current version.

 

[russcrypto]

The BIOS is up to date (F11 I believe).

I've gone back to the optimized settings and even the smallest of changes renders my rig useless. Sometimes it won't POST, sometimes it will POST. When it does, it ends up in an endless loop of restarting.

I would love to OC using the BIOS, but no matter what, it doesn't like any changes what so ever.

 

[GeoMan]

Possibly you have to drop your ram to 667 in order for it to talk nicely with your FSB frequency, or possibly crank it up to 1066 with lax timing and see if that helps?

 

[likeavirgin]

tel the giga engineer to get some help, i 've no idea

 

[balearic]

Try loosening the Ram to 5-5-5-15 and see if it posts at 4.0mhz. Also what is your memory Freq mhz say in the bios?

 

[dobby]

OKOK. i just built a system for a friend and well he had a q9300 and we had to flash the bios, to get it to work properly but like you, it lock up the OC'ing properties. in his case this was because it was a beta bio.

 

[alpine18]

My Gigabyte EX38-DS4 won't O/C either - same problem as yours. I also have seen the same problem with other Gigabyte motherboards. Some people on here will just tell you that you are doing something wrong and say that they can O/C fine with the same board and components. I've asked people to trade boards, but so far, no takers.
Personally, I think that there is an issue with SOME of the recent Gigabyte boards that will prevent you from doing any kind of O/C.

The problem is this: When you set your CPU Clock Control to MANUAL, the system will hang on POST and then the computer will reset with your Clock Control set back to AUTO, and your memory settings set back to AUTO.

You won't even be able to UNDERCLOCK. It will not boot at your CPU's stock speed with CPU Clock Control Set to MANUAL. You will be able to boot OK with various memory settings as long as your CPU Clock Control is set to AUTO. But, as soon as you set CPU Clock Control to MANUAL, the thing will fail to boot.

I've talked to too many people that have had this issue with Gigabyte motherboards to think that this is just a configuration issue. Not all Gigabyte boards have this issue. Only a handful, and it seems to span all models. A BIOS flash will not resolve it.

 

[Crazy-PC]

I am not sure but I think actually the Easytune 5 pro is just a graphical tools use in Windows environment to set the BIOS setting when you use Advanced Mode is around the same as you set the setting in BIOS, at minimum you use easytune 5 will be available to estimate if your overclock setting can boot into Windows or not. You may share your setting in BIOS with us so some expert can advise more detail. Let's try everything you can finetuned in either easytune or in BIOS, it is certain that retail E8400 is not guarantee as Engineering Sample that is available to hit 4GHZ.

 

[dagger]

Those oc utilities are crap. I tried it on x38 board. Unstable at 3ghz for Q6600. Manually oced it goes up to 4ghz 1hr prime95 stable, didn't try to go higher.

If others with the exact same model of motherboard and had no problems ocing, and you didn't do anything wrong, then it's faulty. If the it is faulty, rma it.

 

[NewAMDUser]

If others with the exact same model of motherboard and had no problems ocing, and you didn't do anything wrong, then it's faulty. If the it is faulty, rma it.

^^^ Bingo! I have the same cpu on a Gigabyte EX38-DQ6, and I'm currently at 14 hr 44 min in Orthos at 4GHz (4-4-4-12 rated 4x2GB Corsair running at 5-5-5-18 at the moment). Sounds like an RMA is in your future. Before you do that, though, go over to the TweakTown forums; there is a Gigabyte forum which is monitored/participated in by Gigabyte tech support.