E6750 & Gigabyte P35C-DS3R Overclocking Thread

[5t3v0]

Originally posted by: mrfatboy
lol, I do run a very streamlined system. I don't like a lot of crap running in the background. I actually just tested again without outlook and skype running.


I now get 14.015 sec for 1M superpi. Looks like you have more tweaking to do

Bstd! 14.4 with Firefox & AVG shutdown

I run a lean system too & have every pointless windows service disabled. I still use aero tho which is a resource hog. Still, there should be plenty of resources for this test. Are you using the mod1.5 XS version?

 

[Conjugal Visit]

Hello - brand new here. I've followed your posts and experiences with the GA-P35C-DS3R and the E6750 with great interest. As a form of reference, I thought I would post up on my experiences with these two components. My personal goals for overclocking:

Control temps - system is air-cooled
Mid-range O/C @ 3.52GHz
Mem/FSB linked @ 1:1
Orthos and Memtest stability - both have run 8 hrs and I conclude the test

Component List:

Lian Li PC-60BPLUSII W - Computer Case
GA-P35C-DS3R rev 1.1
Intel Core 2 Duo E6750
Rosewill RCX-Z3 CPU Cooler
Corsair CMPSU-620HX Power Supply
Corsair XMS2 Dominator TWIN 2X2048-6400C4D DDR2 800 PC2-6400
EVGA 320-P2-N815-AR GeForce 8800 GTS 320MB Super-Clocked 576/850
2 - Western Digital Caviar SE16 WD2500KS 250GB 7200 RPM (No RAID)

Preface - I have not experienced anything negative regarding the above components, and specifically, the motherboard. MB was shipped in perfect condition. Bios is F2. Operating system is Windows XP Pro 32bit. Installation of the operating system and components was straightforward. I've never had a BSOD. Never experienced any resets, cycling issues, fan issues, temperature issues, etc. CPU cooler fits beautifully on this motherboard, btw.

Standard CMOS Settings - Page 1

IDE Channel 0 Master - Hard Drive
IDE Channel 1 Master - Hard Drive
IDE Channel 4 Master - DVD + RW
Floppy 3 Mode Support - Disabled

Advanced Bios Features - Page 2

S.M.A.R.T. - enabled
Limit CPUID Max. to 3 - disabled
No-Execute Memory Protect - enabled
CPU Enhanced Halt (C1E) - enabled
CPU Thermal Monitor 2(TM2) - disabled
CPU EIST Function - enabled
Virtualization Technology - disabled
Full Screen Logo Show - disabled
INIT Display First - PEG

Integrated Peripherals - Page 3

SATA RAID/AHCI Mode - AHCI
SATA Port 0-3 Native Mode - enabled
USB Controller - enabled
USB 2.0 Controller - enabled
USB Keyboard Support - disabled
USB Mouse Support - disabled
Legacy USB Storage Detect - enabled
Azalia Codec - disabled
Onboard H/W LAN - enabled
Onboard SATA/IDE Device - enabled
Onboard SATA/IDE Ctrl Mode - IDE
Parallel Port Mode - SPP

Power Management Setup - page 4

ACPI Suspend Type - S3(STR)
HPET Support - disabled

PnP/PCI Configurations - page 5

Resources Controlled by - Auto
PCI Latency Timer (CLK) - 32

PC Health Status - page 6

CPU Warning Temperature - 70C/158F
CPU Fan Fail Warning - enabled
System Fan 1 Fail Warning - disabled
System Fan 2 Fail Warning - disabled
Power Fan Fail Warning - disabled
SMART Fan Control Method - Auto
SMART Fan Control Mode - Auto

MB Intelligent Tweaker (MIT) - page 7

Robust Graphics Booster - Turbo
CPU Clock Ratio - 8X
CPU Host Clock Control - enabled
CPU Host Frequency - 440
PCI Express Frequency - 101
C.I.A. 2 - disabled
System Memory Multiplier - 2.00
Memory Frequency - 880
High Speed DRAM DLL Settings - Option 1
Performance Enhance - Extreme
DRAM Timing Selectable - Manual
CAS Latency Time - 4
DRAM RAS# to CAS# Delay - 4
DRAM RAS# Precharge - 4
Precharge Delay(tRAS) - 12
ACT to ACT Delay(tRRD) - Auto
Rank Write to Read Delay - Auto
Write to Precharge Delay - Auto
Refresh to ACT Delay - 29
Read to Precharge Delay - Auto
tRD - Auto
tRD Phase Adjustment - Auto
System Voltage Control - Manual
DDR2/DDR3 Overvoltage Control - +0.2V
PCI-E Overvoltage Control - Normal
FSB Overvoltage Control - Normal
(G)MCH Overvoltage Control - Normal
CPU Voltage Control - 1.34375V
Normal CPU Voltage - 1.28750V

This setup is pretty darn fast, btw - a 3.52GHz overclock, mem running at low latency and at 1:1, temps at 41C idle/60C stress-tested? It makes me happy.

Regards,

Conjugal Visit

***EDIT***

I've been, and will continue to edit this post with stable changes. I have lowered the DRR voltage to +0.2V, previously at +0.3V. My RAM is spec'd at 2.1V and I thought this board applied a value of 1.8V normally. I'm being led to believe now that 1.8V might not necessarily be the board's voltage. A reduction of 0.1V hasn't compromised the overclock, or stability, and as an aside, PC Health screen now reports DDR voltage as "OK."

I've re-enabled C1E and EIST after the overclock. It works, and I don't see an adverse effect on stability when the processor is stressed. At idle, the processor does indeed throttle back to BELOW 2.66GHz spec (moves to 2.52GHz) and voltage drops to under 1.0V. We've been led to believe that these two functions need to be disabled during and after an overclock - I think only the former is true. After finding a stable overclock, you re-enable. C1E effects the processors multiplier - reducing it to X6 - which drops the FSB. This switch alone, however, doesn't seem to effect voltage in a significant way, according to CPU-Z. EIST, on the other hand, has a major effect on voltage at idle. Folks don't seem to understand, though, that it isn't enough to enable it in your BIOS. It has to be switched on in the Windows OS as well.

http://www.intel.com/cd/channe...iefing/eist/203838.htm

Try it - it works.

CV

 

[5t3v0]

Originally posted by: cleverest
5t3v0,

Thanks for the info, I'll try to see how things run without a fan before I worry about it. About applying the AS5 to the NB (if I decide to do that at least...mine seems pretty securely attached right now), I suppose a QTIP would also work to spread it out a little...also someone was saying AS5 is more dangerous then their creme version (on chipsets, cause of small surface area's, etc...), apparently AS5 is a wee bit more conductive Vs. not conductive at all like the creme....I guess if you're a moron it's dangerous....

- Brett

Dont recommend a qtip as it'll leave fibres, sorry fibers , in the paste. Keep the AS5 on the die surface only. If you smear it on any exposed contacts, clean it off with alcohol before you put any power thru it.

 

[5t3v0]

@CV, welcome to the forum & thanks for the post. Nice overclock too. Can you not run this with CPU voltage set to Auto? Then you could enable EIST & C1E & benefit from even more power savings. Also, did you need to overvolt the MCH & FSB? I can achieve 3.6GHz without increasing either.

 

[SniperDaws]

@Cleverest that case is perfect mate, you defo wont need an extra fan on the northbridge with that huge slow turning fan.

i was looking at getting a Antec P182 case but im quite intrigued by yours now Cleverest. Can you turn off the Blue/purple lights?

@ MrFatboy i give up mate im fucked if i know the diffrence between option 1 and option 2.

@Stevo, Hello Pumpkin

 

[5t3v0]

hey sniper, is that what you've been doing for the last few days? Jeezo mate. I'm still supervising the wife with the redecoration. She's got me to take a day off work to sand the floor though the b1tch. Got GRAW2 coming tomorrow but there's no danger I'll be allowed to play it while the bedroom's in the state it's in. Glad to see you've finally overclocked that quad. What vcore are you using for 3.2? Have you tried to go higher?

 

[mrfatboy]

Originally posted by: 5t3v0

Originally posted by: mrfatboy
lol, I do run a very streamlined system. I don't like a lot of crap running in the background. I actually just tested again without outlook and skype running.


I now get 14.015 sec for 1M superpi. Looks like you have more tweaking to do

Bstd! 14.4 with Firefox & AVG shutdown

I run a lean system too & have every pointless windows service disabled. I still use aero tho which is a resource hog. Still, there should be plenty of resources for this test. Are you using the mod1.5 XS version?

yes, i am using the mod1.5 XS version. Maybe it's the difference in ram - Crucial vs. Corsair

Also, regarding the voltages, it's interesting that you need more cpu voltage than I do but I need more NB volts. I wonder if Conjugal Visit is on to something. I didn't bother with the FSB at all.

 

[Conjugal Visit]

Originally posted by: 5t3v0
@CV, welcome to the forum & thanks for the post. Nice overclock too. Can you not run this with CPU voltage set to Auto? Then you could enable EIST & C1E & benefit from even more power savings. Also, did you need to overvolt the MCH & FSB? I can achieve 3.6GHz without increasing either.

Stevo - the overclock is moderate. While I have taken this rig to 3.6GHz, that necessitated overvolting the CPU into the 1.4V range - temps at idle rose 4-5C, and I felt the O/C increase didn't outweigh the stress and strain on the CPU. As I said, this rig is pretty wicked fast running at 3.4, and with Ram timings set where they are. I have tried running 3.6GHz with just a modification of the CPU voltage (still running Ram at 1:1) and I thought I was successful, but I couldn't stress-test with Orthos past maybe 5 or 6 hours.

Current setup can be stress-tested all day and night. Overvolting the MCH and FSB seemed to ensure this. I might be wrong, but I felt I'd rather spread the voltages around just a little, as opposed to leaning hard on the CPU - especially with an air-cooled rig.

As to using Auto for CPU voltage...that's what I did at first. But is CPU-Z can be trusted, it took my CPU voltage way up.

Side note - it pleases me that folks are beginning to realize that they need to use the right version of Core Temp for this board - tJunction of 100C. Posting temp ranges in the 20's-40's, while exciting, were never very realistic.

Regards,

CV

 

[5t3v0]

Originally posted by: mrfatboy
yes, i am using the mod1.5 XS version. Maybe it's the difference in ram - Crucial vs. Corsair

Maybe although our specs are more or less the same. My money is on vista though.

Also, regarding the voltages, it's interesting that you need more cpu voltage than I do but I need more NB volts. I wonder if Conjugal Visit is on to something. I didn't bother with the FSB at all.

I tried raising these while keeping vcore lower & got no benefit. Perhaps the power supply is helping him?

 

[cleverest]

SniperDaws,

Nope the blue lighting seems permanent, although some people claim they've hacked around with it and disabled the lights....if they ever start bothering me, i'll just cover them up with something I guess. For me it was worth that one draw back....

 

[cleverest]

Guys,

check out my post at:
http://forums.anandtech.com/me...d=2061222&STARTPAGE=18

My system won't work! Help! Please?

- Brett

 

[MetalSlugX]

Hey all,
I dont know if my temps are right. I'm getting 52 46 47 51 when running 2 instances of orthos according to core temp 0.95.4 while I'm over clocked to 3.2 (8X400). My ambient temp is around 20C. I'm hoping it just means my heatsink is doing a good job.

 

[roorooroo]

Weird thing happened today..my bios reverted back to stock settings for no apparent reason after i turned the pc this morning. OC'ed to 3Ghz and stable (orthos for 12 hours).
Is there any reason why this should occur? (All power saving options are turned off in the bios btw..running 333x9).

Just wondered.

Cheers.

 

[5t3v0]

@roorooroo, Yep, mine has done that twice. Someone else reported it on this forum too.

@MetalSlugX, yes they are very good temps.

@cleverest, sorry to hear about your problems. Defo sounds like PSU has died. Nothing worse when its all built & ready to go

 

[mrfatboy]

Cleverest,

Did you order your new PSU today? which one did you get? Did you spring for Fedex delivery?

 

[MetalSlugX]

SniperDaws,
How are you running your orthos? The only way I can get it to run 100% is by running one instance on blend and one on Small FFts and then setting up the affinities so each one is set to run two cores. If I set them both to blend, only the first instance I hit start on runs its two cpu's at 100% and the other one just kind of idles. Also what priority are you running at? Thanks in advance.

 

[mrfatboy]

@conjugal visit,

I just noticed that you really have an awesome 6750. Your Normal CPU Voltage is at 1.28750V. Mine normal is at 1.35v. You definately have the jump on us. Lucky you

 

[SniperDaws]

@ Metal Slug, i dont use Orthos, i use prime95 Prime95 256

i then skip Join Gimps and choose stress testing, then choose small fft's and your set, itll be working all 4 cores at its max.



Grrr i need a new graphics card, its not like i can get an 8600GT to tide me over till the 8900GTS comes out as they are slower than my current 7600GT.

 

[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,

 

[jcossin]

Originally posted by: roorooroo
Weird thing happened today..my bios reverted back to stock settings for no apparent reason after i turned the pc this morning. OC'ed to 3Ghz and stable (orthos for 12 hours).
Is there any reason why this should occur? (All power saving options are turned off in the bios btw..running 333x9).

Just wondered.

Cheers.

I had that happen to me on the F5a bios but since I went to F5 final (9/7 release date) it hasn't done it again...

 

[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

 

[roorooroo]

Originally posted by: jcossin

Originally posted by: roorooroo
Weird thing happened today..my bios reverted back to stock settings for no apparent reason after i turned the pc this morning. OC'ed to 3Ghz and stable (orthos for 12 hours).
Is there any reason why this should occur? (All power saving options are turned off in the bios btw..running 333x9).

Just wondered.

Cheers.

I had that happen to me on the F5a bios but since I went to F5 final (9/7 release date) it hasn't done it again...

Hi jcossin

Thanks for the info..well i might just try that F5 final release bios and flash it...no issues associated with that particular bios is there? Also where can i find the F5 final bios download for revision 1.1 boards?
Edit Nevermind I have a different board.

Cheers.

 

[Conjugal Visit]

@mrfatboy - remember thid post to Stevo..?

"5t3v0,

When I go into the PC health option in the BIOS my DDR Ram Test says FAIL. Does yours? I believe it only says fail if I add more volts past the 1.8v. Not sure tho. What do you think?"

Well, just above this post we were talking about default voltage settings for Ram, etc...and I said I'd reduced the overvoltage from +0.3V to +0.2V with no effect on O/C stability? As it happens, when I go to PC Health screen now, DDR doesn't say "fail" now - says okay. Try it for yourself....

Regards.

 

[mrfatboy]

Originally posted by: Conjugal Visit

@mrfatboy - remember thid post to Stevo..?

"5t3v0,

When I go into the PC health option in the BIOS my DDR Ram Test says FAIL. Does yours? I believe it only says fail if I add more volts past the 1.8v. Not sure tho. What do you think?"

Well, just above this post we were talking about default voltage settings for Ram, etc...and I said I'd reduced the overvoltage from +0.3V to +0.2V with no effect on O/C stability? As it happens, when I go to PC Health screen now, DDR doesn't say "fail" now - says okay. Try it for yourself....

Regards.

If I lower the mem voltage then I don't get a 3.6 OC If this board is really 1.8V default memory voltage and I'm only adding +.3v (2.1v) and my memory is rated to 2.2v I'm good to go. I am more apt to believe that the "fail" in PC Health appears if memory voltage is set to anything above 1.8v. I wish we had a gigabyte board rep here in this thread

 

[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.