E6750 & Gigabyte P35C-DS3R Overclocking Thread

[bryanW1995]

Originally posted by: Conjugal Visit

@5T3v0 - stock volts? That WOULD be sweet! No, vcore is set to 1.3500v. Please refer to my post on page 9 of this thread, and you'll see a detailed write-up of my Bios settings. I've added some chit-chat on C1E and EIST and the results I've obtained with these two items enabled after overclock. Your hardware and mine, Stevo, is virtually identical - differences would be PSU, you are running Raid0, and you are running under Vista. I would imagine that you could duplicate what I've observed regarding the throttling down.

You see, I really want to continue to observe this throttle back of multiplier as well as voltage. I want to overclock - for gaming and CPU intensive work - but I don't want to leave the system running the overclock 24/7. F2 seems to give me what I want. Of course, all that is pinned to faith that CPU-Z is reporting reality. As I type this, CPU-Z reports Core Speed at 2.64GHz (FSB at 440 - multiplier reduced to X6) and Voltage at 0.963! Both values are below stock.

Regards,

default vcore for an e6750 is 1.35v, that's what 5t3vo was saying.

 

[Conjugal Visit]

Originally posted by: bryanW1995

Originally posted by: Conjugal Visit

@5T3v0 - stock volts? That WOULD be sweet! No, vcore is set to 1.3500v. Please refer to my post on page 9 of this thread, and you'll see a detailed write-up of my Bios settings. I've added some chit-chat on C1E and EIST and the results I've obtained with these two items enabled after overclock. Your hardware and mine, Stevo, is virtually identical - differences would be PSU, you are running Raid0, and you are running under Vista. I would imagine that you could duplicate what I've observed regarding the throttling down.

You see, I really want to continue to observe this throttle back of multiplier as well as voltage. I want to overclock - for gaming and CPU intensive work - but I don't want to leave the system running the overclock 24/7. F2 seems to give me what I want. Of course, all that is pinned to faith that CPU-Z is reporting reality. As I type this, CPU-Z reports Core Speed at 2.64GHz (FSB at 440 - multiplier reduced to X6) and Voltage at 0.963! Both values are below stock.

Regards,

default vcore for an e6750 is 1.35v, that's what 5t3vo was saying.

@BryanW - I didn't know that this CPU had a specific default voltage. "Normal" voltage my board wants to provide it is stated as 1.28750V. Intel specs, at least the one I've found, doesn't specify a default voltage - instead, they spec a range:

http://processorfinder.intel.c...ails.aspx?sSpec=SLA9V#

Regards,

 

[mrfatboy]

"Normal" voltage my board wants to provide it is stated as 1.28750V. "

Conjugal has the super 6750 chip!


@conjugal, can you put your rig in your sig? I always forget what you have.

 

[SniperDaws]

lmao its looks like our motherboards are complete nails, i might also revert back to F2 just to check if the vcore drops using C1E and Eist when idle.

Mine drops the multi to 6x but doesnt alter the Vcore at all

But OMG why is Gigabyte downloads so slow, its pathetic.

 

[Capitalizt]

Does this mobo have a vdroop pencil mod?

 

[SniperDaws]

im not sure mate, google it and have a look, id google it for us but i cant be arsed as googling for hours to find out what option 1 and option 2 do to memory performance gave me a headache.

 

[mrfatboy]

Originally posted by: SniperDaws
im not sure mate, google it and have a look, id google it for us but i cant be arsed as googling for hours to find out what option 1 and option 2 do to memory performance gave me a headache.

Doh! :laugh:



btw, Janus (gigabyte suport) replied to my post on F4 bios changes.


Dear all

F4 BIOS
1.Fix PS2 keyboard compatibility issue.
2.Add code to check clockgen status.
__________________
Janus Yeh
GIGABYTE Technical Support

 

[kohlersc]

If jcossin is still around and it hadn't been answered yet (just read through the whole thread up till page 8 when I saw his 100degrees C question)

Here is a local quote

All C2D and C2D quad chips have a DTS inside the cores. For non-quad C2D chips, that constant is 85. So your Core Temp = 85 - DTS where DTS is the number the DTS is reporting. For a quad C2D chip, the constant is 100. So Core Temp = 100 - DTS. THIS DOESN'T MEAN THAT THE LIMIT FOR THE CHIP IS 100 °C!

And the main point to note is that the constant is NOT the max temp the chip can handle. Going over 70C is always chancy.

 

[5t3v0]

Originally posted by: SniperDaws
lmao its looks like our motherboards are complete nails, i might also revert back to F2 just to check if the vcore drops using C1E and Eist when idle.

Mine drops the multi to 6x but doesnt alter the Vcore at all

sniper, I'm on F2 still & I dont see any change to vcore either so dont get too hopeful.

Originally posted by: Conjugal Visit
Normal" voltage my board wants to provide it is stated as 1.28750V.

conjugal, you do indeed have a special chip if it says it wants 1.2875v. Mine, like most of us here, defaults to 1.35v.

I'm miffed you can get EIST to work on the F2 BIOS. I've tried most of the settings you have different to mine & still no joy. The only way mine works is if cpu voltage is at auto which is useless.

Edit: Maybe Vista is to blame.

 

[Conjugal Visit]

@5t3v0 - it might be Vista. If you looked at the link I posted page 9 re: C1E and EIST, it seems to discuss XP etc. But I will tell you this: I was NOT getting a voltage drop (just the multiplier reduction, according to CPU-Z) until I followed the directions in that link. Namely, Control Panel --->Performance & Maintenance ----->Power Options -----> Enable "Minimal Power Management."

@mrfatboy - thanks for checking with Giga Support re: the F4 Bios. It does, indeed, add a line to the boot screen re: CPUID. I don't have enough knowledge to judge whether this is something that's necessary for optimal performance. So I've reverted to F2, since I'm not experiencing any problems with O/C, Ram timings, temps, or voltages.

Regards,

 

[Conjugal Visit]

Uh, that sig didn't turn out so well - sorry about that.

 

[5t3v0]

Originally posted by: Conjugal Visit

@5t3v0 - it might be Vista. If you looked at the link I posted page 9 re: C1E and EIST, it seems to discuss XP etc. But I will tell you this: I was NOT getting a voltage drop (just the multiplier reduction, according to CPU-Z) until I followed the directions in that link. Namely, Control Panel --->Performance & Maintenance ----->Power Options -----> Enable "Minimal Power Management."

Vista is very different. Under power options it has 3 default plans, balanced, power saver & high performance. I use balanced. Within the advanced settings, it has an option called "processor power management" with 2 settings, "minimum processor state" & "maximum processor state". I have minimum set to 5% and maximum set to 100% - the defaults. These settings work when cpu voltage is auto, but do nothing when a manual voltage is used. No combination of settings work. I have just installed the latest chipset drivers from GB website & still no difference. It sucks the big one.

 

[mrfatboy]

Originally posted by: Conjugal Visit

@5t3v0 - it might be Vista. If you looked at the link I posted page 9 re: C1E and EIST, it seems to discuss XP etc. But I will tell you this: I was NOT getting a voltage drop (just the multiplier reduction, according to CPU-Z) until I followed the directions in that link. Namely, Control Panel --->Performance & Maintenance ----->Power Options -----> Enable "Minimal Power Management."

@mrfatboy - thanks for checking with Giga Support re: the F4 Bios. It does, indeed, add a line to the boot screen re: CPUID. I don't have enough knowledge to judge whether this is something that's necessary for optimal performance. So I've reverted to F2, since I'm not experiencing any problems with O/C, Ram timings, temps, or voltages.

Regards,

The boot screen "cpuid" shows up SOMETIMES with my F4g bios. I always wondered about that. I would think it would be the same everytime. Let's dub it "Fuzzy Bios"


BTW, Janus at Gigabyte has sent my voltage email to the R/D guys. He's waiting for a response. I can't wait :evil:

 

[jcossin]

Found some good info on Tjunction vs Tcase, safe temperatures, etc:

http://www.tomshardware.com/fo...core-temperature-guide

Yeah, I don't like Tom's Hardware, but it's a forum poster...

 

[Wurmer]

I have read that post as well, it's pretty well written and the guy seems to know his stuff...

 

[Conjugal Visit]

Originally posted by: mrfatboy

Originally posted by: Conjugal Visit

@5t3v0 - it might be Vista. If you looked at the link I posted page 9 re: C1E and EIST, it seems to discuss XP etc. But I will tell you this: I was NOT getting a voltage drop (just the multiplier reduction, according to CPU-Z) until I followed the directions in that link. Namely, Control Panel --->Performance & Maintenance ----->Power Options -----> Enable "Minimal Power Management."

@mrfatboy - thanks for checking with Giga Support re: the F4 Bios. It does, indeed, add a line to the boot screen re: CPUID. I don't have enough knowledge to judge whether this is something that's necessary for optimal performance. So I've reverted to F2, since I'm not experiencing any problems with O/C, Ram timings, temps, or voltages.

Regards,

The boot screen "cpuid" shows up SOMETIMES with my F4g bios. I always wondered about that. I would think it would be the same everytime. Let's dub it "Fuzzy Bios"


BTW, Janus at Gigabyte has sent my voltage email to the R/D guys. He's waiting for a response. I can't wait :evil:

@mrfatboy - as it happens, the F2 bios also displays this information - sometimes. And then sometimes it just boots along without displaying this info.

 

[jcossin]

Originally posted by: Wurmer
I have read that post as well, it's pretty well written and the guy seems to know his stuff...

So this seems to be the relevant part for us:

E6x50: Tcase Max 72c, G0 Stepping, Tjunction Max 100c, Vcore Max 1.350, TDP 65w, Delta 10c

-Tcase/Tjunction-
--70--/--80--80--80--80-- Hot
--65--/--75--75--75--75-- Warm
--60--/--70--70--70--70-- Safe
--25--/--35--35--35--35-- Cool


So how should we correlate this to temperatures in Coretemp?

 

[kohlersc]

So the way I understand it, CoreTemp is giving you back readings that are not the actual core temperatures.

What they give you is called the Tcase temp which is the Case Temperature (though technically not...more like the temperature near the IHS but not on it). So this Tcase temp is understood to be cooler than the actual core temperature of the die. The difference in temperature between the reported Tcase temp and the true Core Temperature is the Delta value as that is the correction value needed. Which can be 10 or 15 degrees depending on the CPU you own.

So first you get your temperature reading (which is the Tcase temp) and then add the Delta (10 or 15 degrees) and that will give you the actual core temperature. Then knowing the actual core temperature you can determine if you are Cool (35 degrees), Safe (70 degrees), Warm (75 degrees), or Hot (80+ degrees).

This way if you are reporting back a CPU temperature of 70 degrees you know you are going to have problems because your CPU is actually a very hot 80 or more.

This is of coure given the versions of Core Temp that are not corrected for the CPU being used.

But to note the Tjunction Max isn't the max it can run at just the max that can be caculated. So whether the Tjunction Max is 85 or 100 doesn't mean the CPU is capable of going up to that max without throttling, damage, or failure.

 

[kohlersc]

sorry DP

 

[5t3v0]

No. Coretemp displays the Tjunction temp a.k.a. core temp. Hence the name "Coretemp". Speedfan & BIOS display the Tcase temp, a.k.a. cpu temp. Both are measured temps. Tcase is measured using a thermal diode located between the cores and Tjunction is measured using thermal diodes embedded within each core. One temp is not derived from the other. The delta is just their observation of the difference between the two & can be used for validation. The temps given by Coretemp are widely accepted to be an accurate reading of the actual core temperatures. The only flaw is that it does not use the correct Tjunction max for G0 until the 0.95.4 beta, so if using older versions, you need to add 15C to the temps. This is because the Tjunction is internally calculated as the Tjunction max - sensor value.

 

[jcossin]

That's great! So I am at 65C under Orthos load, therefore I am below the SAFE zone and not even WARM!

Looks like if Coretemp is reporting 80C then that's where you are in danger.

Seems like that should clear up a lot of the discussion on safe temps when overclocking.

 

[5t3v0]

Yeah so those bragging that their core temps are in the 50s (you know who you are ) are actually no better off than us. All that money on expensive coolers spent needlessly Seriously though, I wouldn't want to be above 70C for my core temp.

 

[random betrayal]

I just got all my parts put together and programs installed. Everything is running fine so it seems at least. I am running at stock speed with both the vcore and muliplier modifiers enable in the bios(cant remember the name right now). I idle at 1.152 and load at 1.31 in CPU-Z. I ran orthos just to see how everything was looking and I get rounding errors within 20 seconds. I tried Prime and same thing. Is this due to the vcore fluctuations? Any ideas?

I upped the voltage of these patriot modules to +.2 in the bios and speedfan reads it as 2.1, so more empirical evidence of the pour voltage regulation of this board. Jcossin we have the same memory have you had any issues with it?

As for temps my two cores idle at 9 and 16 C both numbers closely correlate with speed fan and core temp. I DL what said it was the beta of core temp but it shows the tjunction of 85 so I need to add 15 to those reading.

 

[SniperDaws]

Originally posted by: 5t3v0
Yeah so those bragging that their core temps are in the 50s (you know who you are ) are actually no better off than us. All that money on expensive coolers spent needlessly Seriously though, I wouldn't want to be above 70C for my core temp.

im happy you twat.....J/k


is there a way to measure the north bridge temp, as like ive ststed since i reseated the heatsink it doesnt get mad hot anymore and im worried its not making contact although if it wasnt making contact im pretty sure my pc would be locking up.

 

[mrfatboy]

Originally posted by: SniperDaws

Originally posted by: 5t3v0
Yeah so those bragging that their core temps are in the 50s (you know who you are ) are actually no better off than us. All that money on expensive coolers spent needlessly Seriously though, I wouldn't want to be above 70C for my core temp.

@5t3v0, Hey I resemble that remark I do beg to differ however. Sniper and I just have more leadway for hot ambient temps. The california sun can be tough but I don't have to worry about it. 3.6 OC 25/7/365 Until my board blows up anyway

@random, Make sure you download the right coretemp (0.95.4). You need the tjunction at 100C for the correct temps.