P5N-E Sli + E6550

24inchgamer

24inchgamer

24inchgamer

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Hi Guys, I have an E6550 with a big Zalman 9500 cooler on and I would like to Overclock.
I have a P5N-E Sli board, the bios shows the following

FSB - Memory Clock Mode = Auto
FSB - Memory Ratio - Auto
FSB (QDR) MHz - Auto
- actual FSB (QDR) MHz 1333.3
MEM (DDR), MHZ - Auto
- actual MEM DDR MHz 666.7

What should I change?
Also under CPU the multiplier is 7

Thanks for your time
 
I have the P5N-E SLI and the good things about these boards is that you can overclock the CPU and the Memory seperately.

First thing to is to set the overclocking to manual and unlink the CPU speed to the RAM and start with the CPU overclocking first.

Raise the FSB to 1700 and the vcore to 1.325 to see if you can get a 3Ghz overclock first.

You should easily get the cpu to 3.4Ghz on low voltages and once your sure that the chip is stable, you can then start ramping your memory up.

As an example, I have 533mhz Samsung memory at 667mhz with 4-4-4-6 1T timings. What memory do you have?
 
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Wiggins said:
I have the P5N-E SLI and the good things about these boards is that you can overclock the CPU and the Memory seperately.

First thing to is to set the overclocking to manual and unlink the CPU speed to the RAM and start with the CPU overclocking first.

Raise the FSB to 1700 and the vcore to 1.325 to see if you can get a 3Ghz overclock first.

You should easily get the cpu to 3.4Ghz on low voltages and once your sure that the chip is stable, you can then start ramping your memory up.

As an example, I have 533mhz Samsung memory at 667mhz with 4-4-4-6 1T timings. What memory do you have?
Click to expand...
Ok thank you Ill give it a go now. Can you explain the 1700 fsb and Multiplier to me? I thought the fsb was more like 333, 400?
Also, my memory is 2GB (2x1GB) Corsair TwinX XMS2, DDR2 PC2-5400 (667), 240 Pin, Non-ECC Unbuffered, CAS 4-4-4-12
 
Your cpu fsb is quad pumped so 1700Mhz would be 425Mhz x 4.

The speed at which your processor runs, for example 3.2Ghz would be 3200 / 7 which would give you an fsb of 457Mhz which when quad pumped would be 1828Mhz which is what you will see in the bios.

You may also be able to get that memory to 800mhz with a slight increase in either voltage or setting the timings to 5-5-5-15.

Hope that makes sense.
 
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You need to have all your voltage and timing settings on the your memory set to auto.

Because it has such a high fsb at stock (1333mhz), you will probably have to raise the voltage just a little higher to 1.35v.

Although increasing vcore may increase the temps of your chip, if you have a good 3rd party cooler sat on it, you will not see as much of a jump as you would with a stock cooler on it.

You can increase your vcore safely up to 1.5v so dont worry so much about it at the moment. You need to first establish what speed is stable and which is not.
 
Wiggins said:
You need to have all your voltage and timing settings on the your memory set to auto.

Because it has such a high fsb at stock (1333mhz), you will probably have to raise the voltage just a little higher to 1.35v.

Although increasing vcore may increase the temps of your chip, if you have a good 3rd party cooler sat on it, you will not see as much of a jump as you would with a stock cooler on it.

You can increase your vcore safely up to 1.5v so dont worry so much about it at the moment. You need to first establish what speed is stable and which is not.
Click to expand...
Thanks man, ill give that a go, hopefully it will post this time. Is there anything I can try before this, maybe just under 3ghz?
Cheers again for your help
 
24inchgamer said:
Thanks man, ill give that a go, hopefully it will post this time. Is there anything I can try before this, maybe just under 3ghz?
Cheers again for your help
Click to expand...

Go for 2.8Ghz instead (1600Mhz FSB).

You should get it to that on stock volts so maybe set the vcore to auto and just raise the fsb.

If it boots, load up cpu-z and check what voltage it's sat on at 2.8Ghz. This will give you an indication of what vcore you may need to raise it by to get 3Ghz
 
Wiggins said:
Go for 2.8Ghz instead (1600Mhz FSB).

You should get it to that on stock volts so maybe set the vcore to auto and just raise the fsb.

If it boots, load up cpu-z and check what voltage it's sat on at 2.8Ghz. This will give you an indication of what vcore you may need to raise it by to get 3Ghz
Click to expand...

Thanks man, that works a treat, although Core Temp reports 21 degs c on both coresm but the bios says 39deg c for the cpu? Which one would be wrong.

Ok its running at 2.8ghz now its using 1.440v

What would you recco now?
 
Excellent coolers those.

Ok, set your vcore to 1.45v instead of auto and raise the fsb to 1720mhz and see if that boots.

That will give you 3Ghz. Those chips have easily been clocked to 3.2Ghz with lowish voltages so you may well get it with no more 1.475v throught it.

Depends on what you want to push it to really. After your happy with the clock you have, then its time to ramp your memory up. :)
 
Wiggins said:
Excellent coolers those.

Ok, set your vcore to 1.45v instead of auto and raise the fsb to 1720mhz and see if that boots.

That will give you 3Ghz. Those chips have easily been clocked to 3.2Ghz with lowish voltages so you may well get it with no more 1.475v throught it.

Depends on what you want to push it to really. After your happy with the clock you have, then its time to ramp your memory up. :)
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ok 1.475 crashed on xp load, but 1.476 and im now back in at 3ghz :D core temp reports 21 deg c. Any ideas why this differs to the bios cpu temp?

Ok.. so now for memory, what are we going for :) It currently says 330.8mhz, 13:10, 5-5-5-31-19 2t
 
Download Everest if you have not got it and use that to see what temps you have on your cpu.

I'm not sure as to why the bios temp reads higher but i'm sure someone else on here will be able to answer that for you mate.

You can leave the voltages on auto for the memory for now and set your speed to stock of 667mhz with timings of 4-4-4-12 and boot it to see if that's ok.

Then you just need to ramp up the speed of the ram in increments of 10-20mhz leaving the timings as they are until it will not boot.

You can do a few things here. Either raise the voltage on the memory or slacken the timings to say 5-5-5-15.

To be honest, your better off seeing what max speed you can get with the 4-4-4-12 timings because you will not see much of a difference slackening the timings just to get a few more mhz out of them.

You raise the speed of the ram in the same area of the bios as you did with the cpu. Remember to have your cpu & memory unlinked also.
 
Wiggins said:
Download Everest if you have not got it and use that to see what temps you have on your cpu.

I'm not sure as to why the bios temp reads higher but i'm sure someone else on here will be able to answer that for you mate.

You can leave the voltages on auto for the memory for now and set your speed to stock of 667mhz with timings of 4-4-4-12 and boot it to see if that's ok.

Then you just need to ramp up the speed of the ram in increments of 10-20mhz leaving the timings as they are until it will not boot.

You can do a few things here. Either raise the voltage on the memory or slacken the timings to say 5-5-5-15.

To be honest, your better off seeing what max speed you can get with the 4-4-4-12 timings because you will not see much of a difference slackening the timings just to get a few more mhz out of them.

You raise the speed of the ram in the same area of the bios as you did with the cpu. Remember to have your cpu & memory unlinked also.
Click to expand...

No joy with the 3ghz so far mate, I get to windows but lock up as soon as I start OCCT and hit some load. im back at 2.8 now :(
 
No probs.

What bios revision do you have on you mobo. Have you flashed it to the newer 0703?

If you have then you need to flash back to the 0608 revision as the 0703 is absolutely pants. I flashed to the 0703 revision and could not go any higher than 2.8ghz no matter what I tried.

If you have not flashed your mobo at all, then check the revision in your bios and flash to 0608 if its any lower.

The 0608 is the best revision that many users have said works for a solid overclock.

You need the ASUS Update V7.09.02 to flash the bios and both can be found here.
 
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Wiggins said:
No probs.

What bios revision do you have on you mobo. Have you flashed it to the newer 0703?

If you have then you need to flash back to the 0608 revision as the 0703 is absolutely pants. I flashed to the 0703 revision and could not go any higher than 2.8ghz no matter what I tried.

If you have not flashed your mobo at all, then check the revision in your bios and flash to 0608 if its any lower.

The 0608 is the best revision that many users have said works for a solid overclock.

You need the ASUS Update V7.09.02 to flash the bios and both can be found here.
Click to expand...

Ah, it is indeed 0703. I download 0608 and ran Asus update but it said the version is later than the current one!? And I need to use Asus Dos Utility if I want to continue. Exactly what do I do here, can I stick it on a floppy, go into the bios and use EZ Flash or do I need something else?
Thanks for your help
 
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