E6400 OC'ing problems...

Combusted

Combusted

Combusted

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Hey, I'm using an E6400, with stock fan at the moment, i plan to get
http://www.overclockers.co.uk/showproduct.php?prodid=HS-010-AS&groupid=701&catid=57&subcat=821

I'm also using AiBooster to overclock my CPU, and i turned it up to +15%, so i'm running at 2452Mhz atm, But when i try to turn it up to 20%, it instantly freezes... doesn't even get a chance to heat up...

The temperature is 50-62C on load, depending on the game (Crysis is the only thing i've seen take it past 60C)

So my questions are:
1. Why can't i overclock it any more?
2. Whats a safe heat for this processor to be running at?
3. am i likely to see a big difference in temperature switching from stock to my desired cooler?
 
1. I'm not an overclocking guru, but i can't recommend using software based overclocking. Explore your bios and research in to FSB and Voltages. There are stickies on this board that will allow you to overclock safely and work out the boundries of your hardware without damaging anything. It will take an afternoon, but you will maximise performance.

2. Some people take them up to 80 degrees before being "worried", but generally the lower the better. 62 Wont do any damage, but neither will running it at 50, if you see what i mean. I think most people aim for aruond the 30 degrees mark, but really there's no "correct" temperature.

3. Yes. You will see quite a sizeable difference between a 3rd party HSF and the Stock HSF. However, might you let me recommend http://www.overclockers.co.uk/showproduct.php?prodid=HS-039-TR&groupid=701&catid=57&subcat=821 over the one you're mentioned. It's pretty much the best HSF available right now and is only £2 more. The Asus you've picked is alright, but there are many better products.
 
with the Thermalright i've linked, you don't get a fan. It has pretty frightening Passive Cooling abilities, but a lot of people strap a 120mm fan to it (£3+) and get even better temps.
 
Combusted said:
Where is the fan attached to it?

Thanks for the replies btw :)
Click to expand...

The heatsink will come with some metal clips that allow you to attach a 120mm fan to the side, similar to this id imagine

HS-006-SY_400.jpg
 
Software overclocking in many cases is the enemy and the worst way for setting permenant overclocks. The way to overclock is through the bios a quick read of the sticky would help.

Try putting the FSB to 360 and leaving the voltage on stock (1.325V) this will mean then putting your ran 1:1 so it runs at 720Mhz ( in your sig it says corsair 5400C4 i'm guessing you mean 6400C4 in which case leave the latencies as they are, or if its 5300C4 loosen them to 5-5-5-15) that will give you an oc of 2.88ghz (360*8) which should be toally prime stable. Check your temps under orthos load (games rarely fully stress processors), the limit for the e6*00 imo is around 65C for a 24/7 oc, benching its ok to go a bit higher but not a lot. Then gradually keep raising the FSB in 5Mhz increments and testing for 10 mins with prime until it becomes unstable then you'll need to start raising voltgage to make it stable. As a rule of thumb a increase of .1V means a 200mhz increase in stable speed. As you raise voltage temps will spiral up quickly and you'll find the limit.

Most e6400 get to about 3.1 Mhz on stock volts.

Hope that helps
Tom
 
I can't rember what it's spec, but 675mhz with C4! Basically as the ram is DDR (double data rate) it runs at twice the frontside bus in 1:1. so at a FSB of 360 in 1:1 will run at 720mhz if that makes sense. You may well find that you can lower the latencies later once you've established your oc but its not really worth it IMO.

What motherboard are you running as you may well have to worry about the motherboards frontside bus hitting a wall because of the 8 times multi.
 
The E6400 is a good Oc'er.

Mine's running @ 3.5, CPUz shows Vcore of 1.5V

runs 24/7 on AF7 temps about 60C.

I just set the memory to auto and upped the FSB & vcore Bingo!
 
Peter-B said:
The E6400 is a good Oc'er.

Mine's running @ 3.5, CPUz shows Vcore of 1.5V

runs 24/7 on AF7 temps about 60C.

I just set the memory to auto and upped the FSB & vcore Bingo!
Click to expand...

Wow, sweet.

I read the guide on the OC'ing forum etc, but im still unsure as to why upping the Vcore helps raise FSB...
But i'm right in thinking upping the Vcore increases temperature massivley right? So i probably shouldn't do that till i change this stock cooler..
 
Well, i was going to try setting the FSB to 360 in the BIOS.
Come across a problem, I can't. :s
The only thing that says anything about changing FSB in the overclocking section allows minimum 533 i think, it's currently 1066.
This is under 'Extreme Tweaking' ---> 'Overclocking'
At the top of the BIOS screen it says
PHOENIX - BIOS CMOS setp utility, dunno if this helps at all.. but i can't seem to find where to change the FSB... it says it was 266 on AI Booster... but 1066 in the BIOs... unless it's talking about a different FSB...
 
The bios on the P5n32-e Sli Plus is a bit rubbish. You might need to get an updated bios from the Asus website. I flashed the bios on my P5n32-e Sli Plus without any problems, however you do hear horror stories. I suggest you look in to bios flashing and decide for yourself if you want to do it :P
 
Well... I'm not sure i want to do BIOS Flashing.

I did find a way to alternate the FSB... but it said the minimum was I think 533, and max 3000... I think... current was 1066... Which is strange because 8x1066... well, it isn't 2.13... even though on AiBooster it says the front side bus is like 260ish...
So...
1. Why is it 1066...
2. How do i get to the FSB which you're telling me to change...?
 
You'll never guess what!
I did it... hehe.

However, My CPU is now at 72C... Is there anything i can do to lower this apart form lower the clock?
It automatically turned the memory FSB up to 900ish aswell... should i unlink the settings?
 
Have you changed your stock HSF,

72C is to toasty, but what are you measuring it with?

Really need to know what settings you have, vcore, fsb multi etc

72C @ 3.6 would be expected but not @ 3.1
 
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