E6750 & Gigabyte P35C-DS3R Overclocking Thread

[mrfatboy]

Originally posted by: Conjugal Visit

@mrfatboy - you missed the point I was trying to lay out there. My personal experience only - and it was just an obvervation - but if the DDR voltage is raised only +0.2V, PC Health declares the DDR voltage "OK." Anything higher, and it says "Failed." I'm not saying "Failed" means anything horrible - I don't know. The assumption I drew from this, and it's purely intuitive, nothing else, is that the BIOS looks at SPD of the Ram, determines the overvoltage exceeds SPD, and calls out a failure. Which led me to believe that maybe the board's Normal voltage might not be exactly 1.8V. Capiche? Oh, you might look at my original post on my BIOS setup - it's been edited with some comments and changes. I'd be interested to see if any of the changes might apply and work for you.

Regards.

I understood you. I probably didn't make myself clear I actually went back and checked all voltages from 1.8v - 2.2v in +.1v increments @3.6OC. PC Health reports "failed" at all settings. So something is wierd there. Not even 1.8v got a "pass". Maybe it's an combination overclock and ram timings. Not sure.

How about you 5t3v0? what settings to you have to have to get a "pass" in Pc health?

 

[Conjugal Visit]

Hmmm...that IS weird.

 

[SniperDaws]

If it helps i get a pass on 1.8-2.1 then fail at 2.2 and ive not taken it higher to check above.

 

[mrfatboy]

Originally posted by: mrfatboy

Originally posted by: Conjugal Visit
@mrfatboy - I really wouldn't know anything about that. I've assumed one is much like another. That "Normal CPU Temp" is what my Bios has always listed in the voltages section. And since this board has always been shy about listing voltages, I've never paid it much attention - you know, in an empirical way. Speaking of voltages, I've always assumed that the board applies 1.8V to DD2, and I've adjusted my voltages to DD2 accordingly (+0.3V...to 2.1V for Corsair Dominator PC-800 C4.) Then I start to see posts that Everest doesn't agree with these numbers - that they are all high. So I scaled back the voltage on DD2 to +0.2V, and ran memtest, then Orthos for eight hours or so, no crashes. So I've edited my O/C config to reflect this lower voltage.

Regards,

I also was a little concerned about the memory voltage also. I asked serveral posts back about it and nobody answered. I figured the software was reporting the volts incorrectly on this G0 chips.

Currently, i have my mem volt +.3 (2.1). This voltage is displayed in apps are these:

Easytune - 2.1v (correct, i as i believe)
Everest - 2.24v
Speedfan - 2.24v

When I lower my volts to +.1v (1.9). Everest and Speedfan display 2.26V. They actually go up :Q It's very wierd. The bottom line is that 2.1v is the only way I can get 3.6 OC.

Regarding the chip, all 6750's are not created the same You got a good one that requires less volts to run

Check this out. I posted my above question over at the tweaktown forums where they have a Gigabyte support guy. Here is what he said about my above post.


Re: P35C-DS3R Memory Voltages?

--------------------------------------------------------------------------------

Just get answer

This issue is caused by Everest.
It looks Everest violates some ITE8718 settings and causes the sensing of all voltages frozen.This violation causes you have to do power-off cycles to recover the sensor.
__________________
Janus Yeh
GIGABYTE Technical Support


hmmmmmmm. i don't think so. I will try to rephrase to him.

 

[SniperDaws]

its the motherboard it has poor voltage mangement, ive read a hell of a lot of stuff about the Vdrop and Vdroop this motherboard has, to be honest if id of read it before buying i wouldnt of bought this motherboard. But im stable at 3.2Ghz for the time being so im happy.


@ Fatboy, Have you and Stevo ran SuperPI now you have your cpu's OC'ed? download it and let see what your getting for the 1m test. i currently get @ 3.2Ghz 16.000secs, its 21.300 @ Stock 2.4Ghz.

 

[Conjugal Visit]

@SniperDaws...15secs @ 3.4GHz

Regards,

CV

 

[SniperDaws]

Cheers mate Thats quick, i just did a 1m test on my Opteron 146 Oc'ed to 2.6Ghz and its 35secs........lol, and that Used to be fast.


@ EVERYONE, Is there any benefit from using Vista as opposed to XP with a Dual/Quad core? I have Vista Premium 32/64bit but i only used it for about 2weeks then i went back to XP but that was before i upgraded.

 

[Conjugal Visit]

You all might find this interesting, or not. I've gotten into using both C1E and EIST - after establishing a stable overclock. (See my post on maybe page 9 of this thread.) And again, I love it. FSB, multipliers and voltages drop dramatically at idle, and it doesn't effect the stability of the overclock I've locked in.

But I thought, since I was doing this Super Pi thing, that maybe there would be some lag as the system goes from idle (shown at 2.5GHz) to 3.4GHz. So I re-started, disabled C1E and EIST, re-booted, and ran the calculation again. No difference - none. 15secs.

Regards.

 

[SniperDaws]

Yeah i use the power saving options, Theres no need to have your system highly strung all the time.

 

[mrfatboy]

Originally posted by: SniperDaws
its the motherboard it has poor voltage mangement, ive read a hell of a lot of stuff about the Vdrop and Vdroop this motherboard has, to be honest if id of read it before buying i wouldnt of bought this motherboard. But im stable at 3.2Ghz for the time being so im happy.


@ Fatboy, Have you and Stevo ran SuperPI now you have your cpu's OC'ed? download it and let see what your getting for the 1m test. i currently get @ 3.2Ghz 16.000secs, its 21.300 @ Stock 2.4Ghz.

5t3v0 and I did some superPI tests several posts back. Where were you? At 1M @ 3.6 it was 14.1 secs I believe he did 14.8 secs. He's attributing to the delay to VISTA.

Regarding the memory voltage issue, I'll still not 100% sure it's a voltage issue either but I'm leaning that way. I think we need to ask some people with an 6750 and a different board and our same ram and see what they get.

 

[SniperDaws]

@MrFatBoy, i was probably sat here red eyed and sleepy tredging through forums and websites trying to find what Option 1 and Option 2 did.

 

[mrfatboy]

Originally posted by: SniperDaws
@MrFatBoy, i was probably sat here red eyed and sleepy tredging through forums and websites trying to find what Option 1 and Option 2 did.

lol, and I appreciated it

 

[random betrayal]

Just wanted to thank everyone hear for some great info as I have been following this thread for a little while now, as soon as the raptor hard drive arrives from the egg, I am going to assemble my rig and attempt to get a mild OC to 3.2 hopefully. I do have one question, though. My Ram is rated up to 2.2 volts and I was wondering if this much is required to run at stock speed of 800 with 4-4-4-12 timings or if I could get away with lowering it?

 

[mrfatboy]

Originally posted by: random betrayal
Just wanted to thank everyone hear for some great info as I have been following this thread for a little while now, as soon as the raptor hard drive arrives from the egg, I am going to assemble my rig and attempt to get a mild OC to 3.2 hopefully. I do have one question, though. My Ram is rated up to 2.2 volts and I was wondering if this much is required to run at stock speed of 800 with 4-4-4-12 timings or if I could get away with lowering it?

if you have been reading my previous post and have been doing some research in this area I have finally come to the conclusion that the P35C DOES overvolt the ram. So be very careful. Setting my ram voltage to +.3 (2.1v) actually is 2.22v. I will run some more tests and see what the other voltages are. I will update this post in a bit with the info.

Regarding your 3.2 OC with 4-4-4-12 ram settings. All I needed to do was set my ram volts +.1 (1.9) to achieve this.



EDIT:

Here is the info that I promised Yes. I really changed bios and rebooted 16 times

All of these voltages were taken with Speedfan & Everest (they matched). I found this thread on Extreme formuns that backed up my data. Also that guy supposedly used a DMM to measure the voltages right off the board.

p35c memory voltage

So basically, this P35C board is really bad a regulating voltages. I didn't even do the +.4 test just because I didn't want to blow my ram up. I am now wondering if "cycle reboot" problem a lot of people are having is from blown ram. Who knows!

-----2.66--2.66--3.20--3.20 ---------> overclock
-----1.35--1.45--1.35--1.45 ---------> CPU voltage
----------------------------------
+.0--2.00--2.00--2.00--2.00
+.1--2.00--2.00--2.00--2.00 ----------->Ram Voltages
+.2--2.13--2.13--2.13--2.13
+.3--2.24--2.26--2.24--2.24


Anybody want to confirm my results or as least some?

 

[SniperDaws]

According to Everset my +2 puts me at 2.1

is this how its supposed to be-

Normal 1.8v
+1 1.9v
+2 2.0v
+3 2.1v
+4 2.2v


ill have a mess and give you my readings from normal to +3 and compare

ok here are my Ram voltages

Normal- 1.97 idle and 1.94 load
+1- 1.97 idle and 1.94 load
+2- 2.10 idle and 2.06 load
+3- 2.22 idle and 2.18 load

looks like +1 does nothing and that 1.8v for defaults isnt correct.

No wonder Gigabyte use OK and Fail in the bios instead of showing your Vcore and other voltages on this board, i wonder what Rev 2.0 of this board is like and if it has the same voltage problems.

 

[mrfatboy]

My data is all at idle. So it looks like we are very close. It's just messed up. I also forgot to tell you that I did a complete test at 2.66 (1.45v) with all the voltage increments. Every single setting came up in Everest at 1.98v. I redid the test and came up with the numbers I already gave you. Very Very Weird.

 

[bryanW1995]

I just posted my info on my thread.

 

[honolululu]

I have the almost the same voltage data as you all. I'm at +0.2 now, reading 2.13v with Orthos Blend running. Passing in BIOS.
+0.3v fails in BIOS with 2.26v in Speedfan.
I was running at +0.4 and checked speedfan and read 2.40v! We're looking at vcore2 right?

EDIT: Wanted to specify RAM is rated to 2.2v

 

[5t3v0]

Back again. Another night out last night so feeling delicate today.

What are you guys fretting about now? :roll: As long as your vdimm is not excessively over 2.2v and your modules aren't too hot and your system is stable, why worry about it? You've got to wonder if Everest is as accurate as its precision suggests. I wouldn't really rely on any software for accurate readings of voltages or temps.

For what it's worth, Everest is saying my +2.5v sensor is 2.26v. I assume this is the reading I should be looking at. Has anyone tried Gigabyte's shitey tool?

In the BIOS, I get OK up to +0.2v & then FAIL with +0.3v.

 

[SniperDaws]

Well for me it means i can stick my Ram back to Normal 1.9v.

i wonder if its the same with the fsb voltages and the northbridge, all the +1's might be useless.

 

[SlicedBread27]

So I finally got my system together and after some initial tweaking Im up to 3.2Ghz on my E6750 and 640/1000 on my 8800GTS.

I have my memory set to +.3V and its showing as 2.14V idle/2.11V load in SpeedFan, but I'm not sold on the Accuracy of it. It also shows my +12V rail ranging from 1.66V to 6.24V - wtf? I'm probably going to tweak this thing a little more and try to get 3.4 out of the CPU.

 

[5t3v0]

My +12v, -12v & -5v readings are mince too. I dont think speedfan has been updated for the P35.

 

[mrfatboy]

Originally posted by: 5t3v0
My +12v, -12v & -5v readings are mince too. I dont think speedfan has been updated for the P35.

This is my original thought thought. I was thinking Everest & speedfan were incorrect. But on the post at Extreme forums the guy actually measured the voltage on the board and it matches the software. It's really bizarre! But if the board is overvolting ram you really need to be careful of the settings.


@slicedbread,
You should be able to hit 3.6! I got 3.2 at stock settings.

@sniper,
I don't think the settings are useless. They may just be inaccurate. I definately need my increased settings to get 3.6 OC stable.

 

[cleverest]

everything was going so well...not it isn't....

I just had my computer working great at 400mhz FSB, 8x, 3.2ghz...memory at 4-4-4-12 1 voltage, seemed to stable, then I ran orthos SMALL test and it failed in 4 seconds....I rebooted, decided to set CPU voltage just one level above the recommended 1.35v....restarted, computer won't boot now, no video...I do get a post beep that that is all....tried unplugging and shorting cmos jumper...doesn't help....

Is this common? What can I do?

- Brett

 

[SniperDaws]

What now you cant get into bios?