Overclocking Problem
#1
Posted 17 May 2008 - 08:42 AM
#2
Posted 17 May 2008 - 10:04 AM
#3
Posted 17 May 2008 - 10:26 AM
What RAM do you have and what FSB:RAM ratio are you running? On a RAM-linked board such as yours, the speed your CPU can obtain also depends largely on the RAM and the FSB:RAM ratio it is set at. With a FSB of 1333mhz, and a board that supports DDR2 (which usually comes in 533mhz, 667mhz, 800mhz or 1066mhz), this can cause problems if the FSB:RAM ratio is set too close to 1:1, as the RAM typically won't be able to keep up with the FSB.
Edited by stettybet0, 17 May 2008 - 10:27 AM.
#4
Posted 17 May 2008 - 11:01 AM
Overclocking a CPU (especially just a 7mhz FSB increase) won't stress the PSU enough to go from working perfectly to not booting.
If the PSU is already at its limit, increasing voltages can.
Adding to what Stettybet0 said, a 1:1 RAM:FSB ratio will clock your RAM at 667Mhz. If you have 800Mhz RAM it can be good to underclock it as such and then clock it back via changes to FSB. Therefore if you overclock your FSB to 400 and set your FSB:RAM to 1:1 you will have 3.2ghz CPU speed and 800Mhz RAM.
There is performance to be gained from setting your RAM:FSB ratio to 1:1.
Edited by Titan8990, 17 May 2008 - 11:01 AM.
#5
Posted 17 May 2008 - 02:20 PM
Edit: Maybe I should try and up the voltage on my RAM.
Edited by Drumbum667, 17 May 2008 - 02:26 PM.
#6
Posted 18 May 2008 - 08:54 AM
#7
Posted 18 May 2008 - 09:10 AM
#8
Posted 18 May 2008 - 09:51 AM
#9
Posted 18 May 2008 - 11:13 AM
Edited by Titan8990, 18 May 2008 - 11:13 AM.
#10
Posted 18 May 2008 - 11:36 AM
Edited by Drumbum667, 18 May 2008 - 11:53 AM.
#11
Posted 18 May 2008 - 06:43 PM
#12
Posted 21 May 2008 - 11:57 PM
Just a quick note, you may want to keep the RAM voltage on the +0.3 setting, but leave the timings as default. This will give them a little more overclocking headroom.
Cheers
Troy
EDIT: With the stock cooler on mine, I have managed to get it running at 3GHz stable. That's the 8x multiplier by 375 FSB. Also I had the following settings:
C.I.A.2 - Disabled
System Memory Multiplier (SPD) - 2.00
DDR2 OverVoltage Control - +0.3V
CPU Voltage Control - 1.375V (stock is 1.35V, but Auto throws it way higher than it ever needs to be)
My system is very similar to the specs you've listed, check it out in my profile. I didn't keep the overclock running, though, because under full load the CPU would hit about mid-60s C, a little too high for my liking. Once I get an aftermarket cooler, I'll likely leave it at 3GHz permanently.
Cheers again.
Edited by troy, 22 May 2008 - 12:05 AM.
#13
Posted 22 May 2008 - 02:31 PM
#14
Posted 22 May 2008 - 03:15 PM
Though it can't hurt to at least try our suggestions first, before dismissing an entire line of well-selling, popular motherboards as "bugged".
In addition to trying what Troy suggested, have you tried updating the motherboard's BIOS? Often this can fix overclocking issues. For example, my 680i seemingly hit an FSB wall like you've described at 400mhz with my E6750 (3.2ghz). After updating the BIOS, however, I've now been able to get it up to 500mhz (E6750 @ 4.0ghz), and could still go higher if my CPU wasn't so close to frying at this point (it's on air)...
#15
Posted 22 May 2008 - 03:51 PM
Do the following.
1. Update your BIOS like stettybet0 said, I know there was a stability issues with these boards before BIOS version F4.
2. Do the following adjustments within your BIOS.
C.I.A.2 - Disabled
Enhanced Speed Step - Disable
C1E(Enhanced Halt State) -Disable
System Memory Multiplier (SPD) - 2.00
DDR2 OverVoltage Control - +0.3V
CPU Voltage Control - 1.375V (if you don't have an aftermarket cooler, watch your temps closely)
PCI frequency - 100MHz
Loosen your timings to 5-5-5-15 (this will be fixed later)
Increase your NB voltage +0.1V
I bolded the PCI frequency simply because MANY people forget about this important detail. Failure in adjusting this setting from auto to 100MHz will result in a premature death of your video card. If this ever reaches a high enough point (it depends on the chipset), your SATA controller will go wonky as well, in a worse case scenario (data wise), you could corrupt your windows install.
Lastly, how many boot cycles did you let your computer do? Mine takes about 4 boot cycles to complete the overclocking adjustments.
James
Edited by james_8970, 22 May 2008 - 04:02 PM.
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