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Need help overclocking e6750

post #1 of 14
Thread Starter 
Hey, i'm pretty new to the overclocking scene, and I just got a new computer built. Here's the details about my computer:

Intel Core 2 Duo e6750 (2.66ghz, 1333 FSB).
Asus P5K Deluxe motherboard
BFG Geforce 7950 gt oc 512 mb video card
2 x 1 GB Corsair Dominator Ram (4-4-4-12)
Windows Vista 32 Bit.

So I want to overclock this processor, since i've seen people get 3.5+ ghz from it, with stock cooling. I bought a huge copper heatsink, with a fan for my processor, along with 6 fans throughout the case, so I think it should be fine on staying cool.

My question is this: What do I need to do with the Voltage to the CPU?
So far, this is what I did, and I kept it low to be safe:
Left the Multiplier at 8 (Max), and upd the bus speed from 333 (stock), to 400. This puts me at 3.2 ghz, and it seems stable thus far.

My voltage was left on Auto, and it seems to max out at 1.384v, according to CPU-Z. I'm not fully sure what else I need to change in the Mobo to get more out of it.

Any help is greatly appreciated,
Alex.
post #2 of 14
Which cooler do you have? Is it the Zalman? (that's the only mostly copper cpu cooler that comes to mind) Voltages, when left on auto, will scale up or down depending on how much you overclock, and whether or not you disable C1E/EIST or leave them enabled. Personal suggestions to you:

1) If you plan to only overclock, disable C1E/EIST unless you're planning on a serious overclock. A couple hundred MHz won't require overvolting at all, and you can get away with windows lowering your clock speeds and voltages when idle, to save power.
2) Manually set your voltages to what CoreTemp says is your VID (mine happens to be 1.2875). This is what Intel specifies your STOCK voltages to be for that chip, and each chip will be different.
3) You said your voltages "max out at 1.384, according to CPU-Z." Is that the max under load? Or the max at idle?
R'lyeh
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 (4.03GHz) Gigabyte EP45-UD3P EVGA GTX285 4GB (2x2) Corsair Dominator (5-5-5-15, 2.1v) 
Hard DriveOptical DriveOSMonitor
300GB WD VelociRaptor, 320GB WD Caviar 7200 Lite-On 20X DVD+R Ubuntu 10.04 x64 / Vista Home Premium x64 Samsung 226BW 
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Generic P/S2 Corsair HX750W Lian-Li V2000 Logitech G3 
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R'lyeh
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 (4.03GHz) Gigabyte EP45-UD3P EVGA GTX285 4GB (2x2) Corsair Dominator (5-5-5-15, 2.1v) 
Hard DriveOptical DriveOSMonitor
300GB WD VelociRaptor, 320GB WD Caviar 7200 Lite-On 20X DVD+R Ubuntu 10.04 x64 / Vista Home Premium x64 Samsung 226BW 
KeyboardPowerCaseMouse
Generic P/S2 Corsair HX750W Lian-Li V2000 Logitech G3 
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post #3 of 14
Thread Starter 
Yes, it is in fact the Zalman cooler.

I'll go ahead and disable C1E/EIST, but i'd like a decent overclock. My plan is to get around 3.3-3.4 at least.

Under load, my computer goes to 1.384, 3.2 ghz, and 8x Multiplier.
Under idle, it goes to like 1.1, with a 6x Multiplier.

For now I have everything on Auto in bios, because I wasn't too sure what to change to a set number. You mentioned CoreTemp? I'm not too familiar with what that is, is it just a program that recommends what to set your voltages to?

Another concern of mine is the accuracy of SpeedFan? I have no idea what Aux is for, but it's saying that it's at 125ºC, constantly, and that the fan is only going at 500 RPM. I've had no crashing issues, and nothing else is even getting lukewarm hardly, so should I just ignore this?
post #4 of 14
CoreTemp is a very handy and well trusted temperature reader for processors. It reads a bunch of information about the cpu in addition to the temperatures. One of these readings is called VID, which is the Intel-specified stock voltage for that particular chip. It ranges up to about 1.35v, though I'm not particularly sure what the low end of the range is, I'd say 1.27 or so (don't quote me on that). This is what you should set the vCore to in the bios for starters, you can change it later on as your overclock increases and you need to pump more volts through your chip.
R'lyeh
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 (4.03GHz) Gigabyte EP45-UD3P EVGA GTX285 4GB (2x2) Corsair Dominator (5-5-5-15, 2.1v) 
Hard DriveOptical DriveOSMonitor
300GB WD VelociRaptor, 320GB WD Caviar 7200 Lite-On 20X DVD+R Ubuntu 10.04 x64 / Vista Home Premium x64 Samsung 226BW 
KeyboardPowerCaseMouse
Generic P/S2 Corsair HX750W Lian-Li V2000 Logitech G3 
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R'lyeh
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 (4.03GHz) Gigabyte EP45-UD3P EVGA GTX285 4GB (2x2) Corsair Dominator (5-5-5-15, 2.1v) 
Hard DriveOptical DriveOSMonitor
300GB WD VelociRaptor, 320GB WD Caviar 7200 Lite-On 20X DVD+R Ubuntu 10.04 x64 / Vista Home Premium x64 Samsung 226BW 
KeyboardPowerCaseMouse
Generic P/S2 Corsair HX750W Lian-Li V2000 Logitech G3 
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post #5 of 14
Thread Starter 
Thus far, I disabled EIST and C1E, set the FSB to 415, Mult to 8, and Vcore to 1.35 (this is what CoreTemp told me).

Pretty big improvement on Superpi, and no problems so far. The Core has not gone above 27ºC on a full load, so it's not getting warm at all.

On CoreTemp, the TJunction is at 85ºC, however. Is that normal?
post #6 of 14
TJunction of 85C is normal for the E6700. It's the maximum temperature before the computer shuts itself down to prevent damage to the components. As overclockers, we give ourselves a wide margin of error (keeping it at or below 60C) just to be safe.
R'lyeh
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 (4.03GHz) Gigabyte EP45-UD3P EVGA GTX285 4GB (2x2) Corsair Dominator (5-5-5-15, 2.1v) 
Hard DriveOptical DriveOSMonitor
300GB WD VelociRaptor, 320GB WD Caviar 7200 Lite-On 20X DVD+R Ubuntu 10.04 x64 / Vista Home Premium x64 Samsung 226BW 
KeyboardPowerCaseMouse
Generic P/S2 Corsair HX750W Lian-Li V2000 Logitech G3 
  hide details  
Reply
R'lyeh
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 (4.03GHz) Gigabyte EP45-UD3P EVGA GTX285 4GB (2x2) Corsair Dominator (5-5-5-15, 2.1v) 
Hard DriveOptical DriveOSMonitor
300GB WD VelociRaptor, 320GB WD Caviar 7200 Lite-On 20X DVD+R Ubuntu 10.04 x64 / Vista Home Premium x64 Samsung 226BW 
KeyboardPowerCaseMouse
Generic P/S2 Corsair HX750W Lian-Li V2000 Logitech G3 
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post #7 of 14
Thread Starter 
I can theoretically keep upping the FSB until the computer isn't stable, or starts to heat up too much right?
post #8 of 14
Couple of limitations these C2D's experience

1) Motherboard simply won't post after a certain FSB, may be because of the strap, or it's at its limit.
2) Temperature (60C max) barrier is reached, better cooling may be required or OC'ing should stop.
3) CPU limitations. My CPU, while it posts and runs @ 3.6GHz, isn't stable for more than 6 hours at these speeds, with any voltage. The cpu either can't hold its voltage well, or it just has issues above a certain final clock speed.
R'lyeh
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 (4.03GHz) Gigabyte EP45-UD3P EVGA GTX285 4GB (2x2) Corsair Dominator (5-5-5-15, 2.1v) 
Hard DriveOptical DriveOSMonitor
300GB WD VelociRaptor, 320GB WD Caviar 7200 Lite-On 20X DVD+R Ubuntu 10.04 x64 / Vista Home Premium x64 Samsung 226BW 
KeyboardPowerCaseMouse
Generic P/S2 Corsair HX750W Lian-Li V2000 Logitech G3 
  hide details  
Reply
R'lyeh
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q9550 (4.03GHz) Gigabyte EP45-UD3P EVGA GTX285 4GB (2x2) Corsair Dominator (5-5-5-15, 2.1v) 
Hard DriveOptical DriveOSMonitor
300GB WD VelociRaptor, 320GB WD Caviar 7200 Lite-On 20X DVD+R Ubuntu 10.04 x64 / Vista Home Premium x64 Samsung 226BW 
KeyboardPowerCaseMouse
Generic P/S2 Corsair HX750W Lian-Li V2000 Logitech G3 
  hide details  
Reply
post #9 of 14
Thread Starter 
Is it OK to leave my Vcore on auto? I set it to 1.35, as recommended by CoreTemp, but it wasn't stable, and I kept getting an error in Orthos on the lines of "Hardware failure detected, consult stress.txt file".

When I set it to Auto, and set the FSB at 410, the voltage goes to 1.39+, and the computer no longer gets that errror.
post #10 of 14
Generally you don't want to leave it on auto, because when there is no load the vcore can drop low enough to where you'll start having stability issues. With that cooler you should be able to set the vcore to 1.42v no prob and keep everything cool, and that is being very conservative. If 1.4 to 1.42v doesn't get you to 3.4ghz then post back saying so.
Game rig
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2600k MSI z68 - 65 290 2 x 4GB G.Skill RipJaw 
Hard DriveCoolingOSMonitor
850 EVO D5 Vario, XSPC Raystorm on CPU, SR2 480mm rad a... Windows 10 64bit BenQ xl2730z 
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Game rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
2600k MSI z68 - 65 290 2 x 4GB G.Skill RipJaw 
Hard DriveCoolingOSMonitor
850 EVO D5 Vario, XSPC Raystorm on CPU, SR2 480mm rad a... Windows 10 64bit BenQ xl2730z 
KeyboardPowerCaseMouse
G410 Corsair TX850 Core P5 G502 
Mouse PadAudio
zboard gaming pad Onboard 
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