GA-EP43-DS3L Overclock problem

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girish78

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Hi I have a new problem now.

I now face double boot when I turn the PC on once the power is completely turned off from the wall socket.

I overclocked the proccy to 3.2 ghz with FSB = 450 and Multiplier 8. Ram running at 1:1 ratio at 800 Mhz. CPU Core voltage 1.30625, DRAM Voltage 1.9V and MCH voltage 1.3. CPU PLL set to 1.55 and CPU Termination voltage set to Auto (1.2 volts). All other options are Auto.

I went into BIOS and change load fail safe default and turned off PC completely and power from wall socket. Restarted comp and doubleboot gone.

Then I went into BIOS and changed setting to FSB 320 , Multiplier 10, Set Ram ratio 2.5A which made ram run at 800 Mhz and all other settings as it is and the system did not double boot..

I am confused as to why at higher FSB and lower multiplier the system double boots when I first turn it on.

What am I doing wrong??????????:huh:

Please advise.
 
girish78 said:
What would be the safe limit for VTT and MCH voltage?
Click to expand...

Depends upon the cooling (of the MCH/cpu/ power circuits) and quality (outputs) of ur psu etc..

whats the max values of these in ur bios?
 
MCH is 1.5. Dont remember about CPU VTT. Do I really need to bump MCH to get higher FSB and lower multiplier. If the problem is with the voltage, why does the system boots fine though doubleboot. I ran OCCT with 400X8 and it was stable.
 
There are a few ppl speculating that the p43s are limited to 420fsb. Read up online. Quite a few p43 boards are unstable above 415-420 fsb. Could it be that?
 
by double boot, do you mean ur PC turns itself on twice after you press the start button... with a small pause in between... if yes, then I guess its normal coz most new mobos run a self test for the configured settings before it starts the BIOS...
 
hey no need to play w/ VTT, GTLREF, its not essential to increase for dual cores, these settings play major role in OCing Quads, or benching any CPU near CPU/Mobo FSB wall.

and its not doubleboot, its double posting. Try another BIOS, and keep power ON from mains after shutting down PC and see if it still doubleposts on next boot.
 
This mobo has got the latest BIOS. If the power from mains is not turned off it does not double boot. If power from mains turned off then first it starts to boot, then it turns off quickly and then boots properly.

This problem happens when I increase FSB and reduce multiplier. With stock settings it does not doubleboot even after turning off the main. I overclocked proccy to 320X10 and it does not doubleboot. I noticed doubleboot when I increase FSB to 400 and multiplier to 8.

I ran OCCT after Ocing 450X8 and it is stable for one hour.

God knows why this is happening. Please help......:huh:
 
Finally I have fixed the problem. Well thanks to all who tried to help. The problem is with the settings the MCH Latch in Gigabyte Mobos. If you face similar problem let me know. I will gladly help you fix it.
 
girish78 said:
Finally I have fixed the problem. Well thanks to all who tried to help. The problem is with the settings the MCH Latch in Gigabyte Mobos. If you face similar problem let me know. I will gladly help you fix it.
Click to expand...
Care to throw more light on it? I am getting double boot in my p35-D3Sl
when I overclock at 360 @ 10X with PCI as AUTO...
Also I am unable to set the PCI at 90-100..it double boots whenever I do this
 
girish78 said:
Finally I have fixed the problem. Well thanks to all who tried to help. The problem is with the settings the MCH Latch in Gigabyte Mobos. If you face similar problem let me know. I will gladly help you fix it.
Click to expand...

Please elaborate more.
 
Okay sure buddies. Throwing light(Bright light now).

I am not sure about Abit Mobo settings. But here is the fix.

Depending on your proccy you need to amend the following setting.

If your proccy runs at 266 Mhz (Default), then when you OC beyond 333 Mhz it will double post. If your proccy runs at 332 it wont double post. By default the MCH latch setting is set to Auto which causes the Mobo to adjust the latch while boot. The solution is to change the MCH Latch or MCH Strap to the desired CPU Frequency at which it is running. In case you have OC your proccy and it is running at 333 Mhz, then change the strap or latch to 333. If CPU FSB is 400 Mhz, change the latch or MCH strap to 400. Please check in BIOS. Also, change the CPU Clock skew to 800 and PCI Express to 900. These options would be available under Advanced Clock settings.

Hope this helps.:)
 
I have a EP43 DS3L with a q8200 and am facing the same issues. It will boot perfect till FSB is 419 Mhz, wont boot above that. Will try your fix.
 
I had this problem with the S3L, using an E2160 (default 9x200) running very very happily at 9x266 to give 2.4ghz. Many many trouble free hours of gaming and installing in windows, reboots fine, but as soon as I shutdown I would get the same problem. Power it on, after a few seconds it powers off again, resets the BIOS to 9x200 and boots up at only 1.8ghz. I tried the MCH latch at every setting, and everything else for that matter. I was using Crucial Ballistix 667mhz memory so I tried changing that to Kingston HyperX 1066mhz memory. Same problem. Noticed on Gigabyte site that the BIOS had gone from F9a to F9b beta. Flashed BIOS to F9b went into BIOS and the MCH latch AND the FSB had set to 333mhz. So set CPU to 9x333=3ghz, with voltage at 1.35, set the memory to reference of only 1.8v at 1066/5-5-5-18 and it booted up, ran fine and more importantly kept all settings after a proper shutdown and being completely off for 5 mins. Tried again with memory at proper setting of 1066/5-5-5-15 @2.2v - still fine. Finally put the Crucial Ballistix memory back in at x2 to run it at stock 667 and 2.1v and the system has been fine ever since. So I would recommend going to BIOS F9b and hopefully that will sort it. Good Luck!
 
Not sure if you know, but you don't need to boot from a removable disc anymore to flash the bios on modern motherboards. The '@bios' program from the Gigabyte website does it from within Windows. You just install the little program, run it and point it to the new bios file you have downloaded and unzipped. Sure, BIOS flashing is not to be taken lightly, so make sure your system is at its most stable. IE put your cpu back to standard speed and disable all other programs, the flash itself will only take a few seconds so as long as you don't get a power failure in those seconds it'll go fine.
 
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