Serious Overclocking issues, help needed

mar00n

mar00n

mar00n

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Joined
11 Jun 2011
Posts
19
Hey guys, my first post. I recently decided to upgrade my old system and go into the unknown terratory of DDR3 and AM3.

My Specs :
1090T X6
Vengeance 1600MHz 8GB (2 x 4GB)
Asus m4a87TD EVO

This was working fine on stock so I slowly overclocked, I hit a wall at 4.2GHz with the ram using 9-9-9-24-41-1T timings at around 862MHz. All was fine until I started my computer the next morning. It kep Blue screening at the windows login page. Had trouble since

All of a sudden no config will pass more than 5 mins on Prime95 and im really stressed.

Here was the config in more detail
[email protected] 1.5v
mem @1680 1.55v
everything else was left to auto.

I have tried both sticks in all slots and used each at one time, reset bios etc etc. Now I am running the default config so cpu @3.2, mem with default timings and voltages.

I can't run Prime95 for 10 mins without it coming up with this "FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file." usually only on one core. Sometimes Prime95 will just close by its self and my allcpumeter in the top right goes a funny colour so I have to turn off.

Any advice will be MUCH appreciated.

Thank you

**edit - I flashed the bios to latest version, same issues
 
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have you set all the default settings yourself or used auto?

Is the stability in prime effected by the tests you run (ie blend or whatever)
 
The tests are in blend. I used auto for all my configs. Also tried using recommended voltages from various sites, nothing is working. Not even for default.
 
I have spent all night trying various set-ups and have managed to somehow get it STABLE. Here are my current settings for the BIOS

*********************************************************
OC TUNER [ D.O.C.P]

Dram O.C Profile = #1
Profile info - 1600 - 8-8-8-24-2T - 1.5V

CPU Ratio = 19.5
Turbo Core - Disabled
Bus - 200
Dram Frequency - 1600
CPU/NB Frequency - [AUTO]
HT Link - Auto
*********************************************************

Voltage - Manual

CPU Voltage - 1.559375
CPU/NB Voltage - 1.16250
Dram Voltage - 1.55
HT - 1.2
NB 1.11250

*********************************************************
CPU Load Line - Disabled
CPU/NB Load-Line - Disabled
Spread Spectrum - Auto
*********************************************************

CPU Settings
Cool 'n' Quiet - Disabled
C1E - Disabled
*********************************************************

Three things that don't make sense at all

1. Why does it fail when BIOS is reset and everything is set to default speeds

2. The voltage keeps going down when under stress, eg. as I type this with no tests running the voltage is sitting at 1.512V but when I run prime it can go as low as 1.392V which must be causing the instability. If I set the voltage to auto it goes even lower!

3. If I lower the multi to 19x and raise the fsb to bring it to just over 3.9GHz ~(so the ram speed goes up slightly) it becomes unstable again.

Tearing my hair out here
76593971.png
http://imageshack.us/photo/my-images/812/42949717.png/
 
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disable turbo core , why ur mem volts so low running eco mem ?

i had to give extra .5 v on memory over it rated 1.65v to get it stable.

also your vcore is bit high , increase your cpu/nb 1.2 or 1.25 then also you can increase your nb speed
 
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Thanks for the reply. If i lower the Vcore any more it fails Prime. It never runs at that voltage, like I say, it keeps going down under stress. If there was a way to stop the vcore going down I think it would solve all my problems. You would think the Vcore would be going up under stress, not down :s
 
mar00n said:
Thanks for the reply. If i lower the Vcore any more it fails Prime. It never runs at that voltage, like I say, it keeps going down under stress. If there was a way to stop the vcore going down I think it would solve all my problems. You would think the Vcore would be going up under stress, not down :s
Click to expand...

http://support.asus.com/FAQ/detail....ajeg5&no=BB542EC4-859E-799C-54E9-134CAC600E4A

I`ve just OC`ed my [email protected] and noticed the samething as you. Btw, unable to change my Vcore. But the link above explained why Vcore varied under stress. Not having had other Asus mobos, i wondered if maybe this a common feature or just my mobo. And YES, my system is stable.
 
************************************************** *******
CPU Load Line - Disabled
CPU/NB Load-Line - Disabled
Spread Spectrum - Disabled
************************************************** *******
 
I am assuming it is my motherboard. Should I take this back or the ram?

** Edit - Also, psychas & lrlcr. You have similar set-ups to myself, could I kindly ask you to tell me what voltage your CPU goes down to when running prime please?

Thank you
 
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CPU Load Line - Enable this
CPU/NB Load-Line - Enable this

1. Why does it fail when BIOS is reset and everything is set to default speeds

Probably due to memory settings - by using DOCP and Profile #1 this automatically sets the standard settings for your memory, otherwise it tries to guess the values.

2. The voltage keeps going down when under stress, eg. as I type this with no tests running the voltage is sitting at 1.512V but when I run prime it can go as low as 1.392V which must be causing the instability. If I set the voltage to auto it goes even lower!

Thats what CPU Load line is for mate ;) - Keeps it all in check - every board suffers vdroop.

3. If I lower the multi to 19x and raise the fsb to bring it to just over 3.9GHz ~(so the ram speed goes up slightly) it becomes unstable again.

You have a Black Edition CPU so you don't need to overclock the FSB mate - use it ;) - its much easier that way

You also need to seriously lower that vcore - 1.55 is waaaay too much. For reference I run 4Ghz (200x20) @ 1.42v
Once you've got the CPU multiplier stable with volts - start pushing your CPU-NB - As you need to have that at least 2400 so as to not bottleneck your memory which is running @ 1600Mhz.
 
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Thanks for putting the time in there zoomee. Trying to get it stable at 4Ghz (200x20), It crashed on your recommended voltage so I have slowly increased it and it keeps failing, just set it to 1.50v and it still fails. Gonna increase again.

It keeps failing core 5?

I have also tightened my memory timings to their recommended settings, I have the CL8 kit (8-8-8-24-41-1T).

settings at the moment:
CPU Ratio = 20
Turbo Core - Disabled
Bus - 200
Dram Frequency - 1600
CPU/NB Frequency - 2400
HT Link - 2000
************************************************** *******

Voltage - Manual

CPU Voltage - 1.50
CPU/NB Voltage - 1.212
Dram Voltage - 1.65
HT - 1.25
NB 1.4375

************************************************** *******
CPU Load Line - Enabled
CPU/NB Load-Line - Enabled
Spread Spectrum - Disabled
************************************************** *******

CPU Settings
Cool 'n' Quiet - Disabled
C1E - Disabled
************************************************** *******
 
so far so good in terms of stability 1.512V anything lower than this voltage and core 5 fails prime in under 5 mins.

If this thing holds out for the next few hours the only thing that needs fixing really is the multiplier going down to 4x. It reaches 60 degrees and drops.
 
No matter what i try i cant go above 3.7ghz,maybe try a lower clock and get it stable all cores,also maybe your memory as its o/c d might need 1.65v
 
Each CPU is different mate, but I've yet to see a 1090T not be able to hit 4Ghz!.

Drop your CPU-NB back down to 2000Mhz, leave your memory timings lax and concentrate on getting 4Ghz stable just on the CPU first if i was you.

Just adjust the vcore and leave all other voltage settings at Auto if you can. Ensure latest BIOS, and also ensure you have a decent power supply as these chips at 4Ghz can sup a fair bit of juice under full load.

1.5V is ok I guess provided you keep an eye on your temperature. 62 Degrees C is absolute max, 58-60 recommended (for high overclocks). Use the Asus PC Probe program that came with your mainboard - it'll give you the accurate temp reading from the CPU (don't use coretemp etc).

hth.
 
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