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post #11 of 18
Thread Starter 
Quote:
Originally Posted by ckp64 View Post
Congrats on successfully overclocking your E6300 to 2.45ghz (350FSB) that's almost a 32% increase from stock!

Your 3dmark06 scores will not increase as much from overclocking the CPU as it would from overclocking your GPU (evga 7900GS), because 3dmark06 is more dependent on your GPU than CPU. Coolbits 2.0 or AtiTool .25 (meant for ATI cards but also now compatible with Nvidia cards) are excellent programs that will help you overclock your GPU.

Running 1M calculations with SuperPi is another great way of seeing your improvement from overclocking your CPU.
Thanks man. I tried pushing it to 400 fsb and no luck. I may try and see if I can get a little higher. Perhaps if I cool it more. I have 2 120mm fans in there now with a stock fan on the gpu and a masscool cpu heatsink/fan. I should probably just be happy with 2.45ghz. I will use the coolbits to tweak the gpu to see what further gains I can get.

Cheers
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post #12 of 18
Good luck overclocking that 7900GS.

About reaching 400FSB...did you try increasing Vdimm (safe up to 2.1-2.2V, or more with good case airflow and active cooling on the RAM) or loosening your RAM timings (to 5-5-5-15)?
I'm pretty sure you should be able to get 400FSB without changing anything else. Core 2 Duos usually don't need increases in Vcore until 3.0-3.2+ghz (Heck I run my E6300 at 2.8ghz with 100% stability under-volted to 1.25V), so I think that your current settings for your RAM are holding your OC back.

But if you choose to stay at 2.45ghz I wouldn't blame you, because that is still a pretty fast CPU.
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Da Gallardo
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post #13 of 18
Thread Starter 
Quote:
Originally Posted by ckp64 View Post
Good luck overclocking that 7900GS.

About reaching 400FSB...did you try increasing Vdimm (safe up to 2.1-2.2V, or more with good case airflow and active cooling on the RAM) or loosening your RAM timings (to 5-5-5-15)?

Is there a way to tell what the current vdimm is? It is set to auto in the bios, if I go to manual is there a particular level to start at? Also, how can i adjust the ram timings? Also in the bios???

Thanks
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post #14 of 18
To change Vdimm in BIOS go Advanced>JumperFree Config and locate the "Memory Voltage" option. You can change the voltage from 1.80V up to 2.40V.

Also very important, make sure to keep the "PCI Frequency" option set to 100mhz at all times (sometimes people use up to 115mhz for the PCI-E when overclocking 475+FSB).

Now to access DRAM settings like timings go to Advanced>Chipset and change "Configure DRAM Timing by SPD" to Disable. That gives the user the option to change RAM timings rather than having the timings change according to the RAM's SPD Table (if your curious look under SPD Tab in CPU-Z to see the timings set according to frequency).

Alright I'm not guaranteeing this will allow you to boot with 400FSB, because I don't know the exact model of your RAM and how it reacts to volts, loosening timings, and overclocking. But try this:
- Increase Vdimm to 2.1V
- Loosen timings to 5-5-5-15 (CAS#5, RAS#5, RAS to CAS#5, and RAS to Precharge#15)
- Important: PCI Frequency set to 100mhz

My recommendations for other settings to reach 400FSB:
CPU Vcore Voltage: 1.3250V
FSB Term. Voltage: AUTO (usually no increase necessary for 400FSB)
MCH Chipset Voltage (aka Northbridge Voltage): 1.70V+
ICH Chipset Voltage (aka Southbridge Voltage): AUTO

If system doesn't POST try 2.2V, if still not...
We can take the easy way out and instill a divider favoring FSB over DRAM.
For example keeping 400FSB and changing DRAM Frequency to DDR2 600 (4:3 ratio).

I recommend keeping a 1:1 ratio but if your RAM is holding you back and you want more speed out of your CPU you can always run this divider.

Now I'm done typing, LOL. Goodluck.

Edit: You might need 1.7V+ for the MCH for 400FSB.
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post #15 of 18
Thread Starter 
ckp, when i change the vdimm voltage to 2.1 it shows the figure in red, as well as the mch voltage to 1.70v. It also is in red. Is that something that I should be concerned about?
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post #16 of 18
Quote:
Originally Posted by M4v3r1ck View Post
ckp, when i change the vdimm voltage to 2.1 it shows the figure in red, as well as the mch voltage to 1.70v. It also is in red. Is that something that I should be concerned about?
Yes you should have some concern for the values being red. The BIOS shows these settings as red because they aren't within the recommended voltages.

How about this, instead of changing the Vdimm or VMCH, you instead run a divider on the RAM (set DRAM frequency to DDR2 600, instead of DDR2 800 when FSB is 400) to see if the RAM is holding back your overclock or if the voltage needed on the chipset (VMCH) is. Because I'm guessing those two could be your limiting factors.

When does VMCH values start getting red? Does it turn yellow or purple also?
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Da Gallardo
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post #17 of 18
Thread Starter 
I tried pumping it up to 367fsb with ddr2 732 and it went fine. I also bumped up the video card using ati tool. The core on the video card is 547 and the memory is 399. That seemed to bump up the 3dmark06 to 5069. Quite a jump. When I try and push it to 400 by changing those settings, for vdimm i get a red number for 2.10, purple for 2.05 and 2.00 and a white for 1.95. With the MCH volt, I don't have a 1.70 option, but 1.55 is white, 1.65 is purple, and 1.75 and 1.85 are red. Thanks for all your help ckp.
My System
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CPUMotherboardGraphicsRAM
C2Duo 6300 Asus P5W DH Dlx. EVGA GeForce 7900 GS 2 gb OCZ PC 5400 
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Sata II 320gb Samsung WinXP Pro Ultra 550w 
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My System
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CPUMotherboardGraphicsRAM
C2Duo 6300 Asus P5W DH Dlx. EVGA GeForce 7900 GS 2 gb OCZ PC 5400 
Hard DriveOSPower
Sata II 320gb Samsung WinXP Pro Ultra 550w 
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post #18 of 18
No problemo, goodjob overclocking that 7900GS. 5069 from 4606 in 3dmark06, is sweet.
I would wait for advice on getting your P5W DH Deluxe up to 400FSB, I'm sure somebody has experience.
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Da Gallardo
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