Overclocking E2140 in DFI Lanparty DK P35

[Excalibur717]

Hello,

I recently built the following rigg:
DFI Lanparty DK P35
E2140 (W/Arctic 7 Freezer Pro)
2GB G.Skill DDR2 800
PNY GeForce 8600GT 512MB
Seasonic 500W PSU

I purchased the E2140 specifically for its overclocking performance. The first board i got was a dud and died after a couple of boots (MSI 650i), and unknowingly to me on P35 chipsets it seems you cant unstrap FSB/RAM like you can on the nforce 650i. So ive been trying to OC my E2140 on here and i managed to get up to 2.5GHz (320x8) before encountering problems.

Due to what seems to be the divider having a lowest setting of 200/667, my RAM seems to be getting too high of speeds for it to handle. I upped the voltage to 2.0 and the timings down to 5-5-5-18 (Down from 5-5-15), but still, cant get 325x8 or up to work. Increasing CPU/NB voltage also didnt help.

Temps have still been nice and cool at 30C Idle, 47C load w/1.344v and 320x8.

Does anyone have a suggestion as to how i can get my clock higher or if im missing the actualy dividers in the BIOS? 200/667 seems a little odd.

 

[graysky]

What are you talking about?? You can certainly change the fsb:dram ratio on the p35 chipset. I dunno about the DK, but my LT has many options in this regard.

Chipset strap is one, and although I'm not booted into the BIOS, there's another for different dividers within a given strap.

 

[o1die]

You can try a pin mod first, then overclock from your bios. The pin mod will change the default cpu fsb from 800 to 1066 without affecting your memory timings. But you'll have to disable speedstep in the bios or the voltage will drop too low for stability. The pin mod is linked in other posts; I don't have it handy. It will increase your speed by 33%. Someone suggested copper tape available at Fry's for about $2.50.

 

[brencat]

Set your FSBRAM ratio to 1:1 while you OC. Do not attempt to OC the RAM and the CPU at the same time b/c you won't know where the problem is when you first fail a stability test. Leave your RAM at 1.9 - 2.0v and 5-5-5-15 timings at the 1:1 ratio. Up vcore by 1 notch and run Orthos again until you can pass 3 - 5 hrs at the blend setting. Once you pass, then move up by 10 increments of FSB and retest, adding vcore only as necessary until you hit the OC target you're looking for. Watch temps -- keep them under 70C loaded. Don't use more than 1.48 - 1.50 vcore for 24/7 settings.

One last thing: disable C1E, EIST, and Execute Disable Bit in bios. You can reenable C1E and EIST after you're all done if you want.

 

[demiurge3141]

333/667 is the lowest divider, not 200/667, use it.

 

[Excalibur717]

Originally posted by: graysky
What are you talking about?? You can certainly change the fsb:dram ratio on the p35 chipset. I dunno about the DK, but my LT has many options in this regard.

Chipset strap is one, and although I'm not booted into the BIOS, there's another for different dividers within a given strap.

The BIOS are confusing as hell compared to my 650i's BIOS. If the ratio is indeed the 200/667, then thats what its at and what im using.

Originally posted by: o1die
You can try a pin mod first, then overclock from your bios. The pin mod will change the default cpu fsb from 800 to 1066 without affecting your memory timings. But you'll have to disable speedstep in the bios or the voltage will drop too low for stability. The pin mod is linked in other posts; I don't have it handy. It will increase your speed by 33%. Someone suggested copper tape available at Fry's for about $2.50.

Know of any good tutorials/guides for this?

Originally posted by: brencat
Set your FSBRAM ratio to 1:1 while you OC. Do not attempt to OC the RAM and the CPU at the same time b/c you won't know where the problem is when you first fail a stability test. Leave your RAM at 1.9 - 2.0v and 5-5-5-15 timings at the 1:1 ratio. Up vcore by 1 notch and run Orthos again until you can pass 3 - 5 hrs at the blend setting. Once you pass, then move up by 10 increments of FSB and retest, adding vcore only as necessary until you hit the OC target you're looking for. Watch temps -- keep them under 70C loaded. Don't use more than 1.48 - 1.50 vcore for 24/7 settings.

One last thing: disable C1E, EIST, and Execute Disable Bit in bios. You can reenable C1E and EIST after you're all done if you want.

Theres nowhere to set that ratio. And they are LINKED you cannot OC just one. As far as i know the P35 cannot unlink/unstrap like the nforce chipsets. It seriously looks like you didnt even read my post.

And those settings are disabled.

 

[Drsignguy]

Oh I bet they read your post. But did you read your manual? I am sure there is an area to set the ratios in the bios.

 

[bryanW1995]

do NOT UNDER ANY CIRCUMSTANCES ATTEMPT TO PIN MOD YOUR CPU. You can do anything and everything that you need to do with system from your bios. I've never owned a dfi, but from what I hear they're a nightmare for newbies. The good news for you is that there's a lot of help available out there, and once you figure it out you'll be gtg for any future oc'ing endeavors that you may undertake. Post in the mobo section, try the dfi forums, and also pm aigomorla and rubycon here for help with specific issues.

 

[Drsignguy]

You know Bryan, I thought for sure you have owned a DFI board. I have read in this forum that the DFI boards are extremely hard for newbie's and should consider understanding the fundamentals of a much more simplistic board than this one. I have thought of getting one but reconsidered as I wanted to understand what makes things tick ( so to speak ). Also, I too agree, Don't do any pin mods. You are just asking for more problems.

 

[PliotronX]

Originally posted by: demiurge3141
333/667 is the lowest divider, use it.

That's what I'm using, M0 E2140 currently at 3424MHz changing nothing aside from VCore.

 

[VirtualLarry]

Originally posted by: PliotronX

Originally posted by: demiurge3141
333/667 is the lowest divider, use it.

That's what I'm using, M0 E2140 currently at 3424MHz changing nothing aside from VCore.

Very nice! My E2140s are only running at 3.2GHz, down slightly from 3.28Ghz, where they failed prime once in a blue moon so I lowered them slightly.

What vcore, btw? Mine are at 1.425v (BIOS).

 

[PliotronX]

Originally posted by: VirtualLarry

Originally posted by: PliotronX

Originally posted by: demiurge3141
333/667 is the lowest divider, use it.

That's what I'm using, M0 E2140 currently at 3424MHz changing nothing aside from VCore.

Very nice! My E2140s are only running at 3.2GHz, down slightly from 3.28Ghz, where they failed prime once in a blue moon so I lowered them slightly.

What vcore, btw? Mine are at 1.425v (BIOS).

Thanks, it's currently at +300mv in the BIOS which should be 1.525v, though CPU-Z bounces between 1.44 and 1.50. I've not measured with DMM. It may be stable with less voltage but this was the first I tried and it's 6 hour small FFT stable so far (getting warm weather here to do longer runs). I'm impressed with this board because my Biostar TP35D2-A7 required higher VCore for this speed (1.55-1.56v) and it could only do so with two sticks of memory. I get to use my second pair of sticks with this board My only complaint with this board is the USB throughput is identical to my old CFX3200 which also is a DFI board, seems they have trouble getting USB performance up to par.

I may run at 3.2 as well for the lower VCore, but I'm having fun looking for a max 3.2 was the realistic maximum before I popped the IHS.

 

[Mondoman]

BTW, there's no need to disable XD, as it has no effect on overclocking, and may prove useful in preventing runaway programs or viruses.