O/C Advise: 920@4GHZ - UD3R Mobo

Nice constructive post :rolleyes:

Aside from what I put above I would go back to basics, you have jumped around and tried so many different things with no clear methodology.

Firstly set RAM to the rated timings (9-9-9-20) and the rated voltage, rule that out.

Secondly, lower the BCLK and start again on 191x21 (or 20x as you see in your bios with turbo enabled as a different option). Then set the vcore to 1.26v with LLC enabled and VTT set to 1.3v. Set RAM to rated voltage and IOH to the lowest value, PLL to 1.8v which is stock too. Your obviously getting somewhere with the clocking if Prime can blend for 4 hours without issue but fail IBT.

Also to note the BSOD you got previously (clock interrupt not received on secondary processor) will typically mean not enough vcore.

The above are just starting voltages, a good starter would be 1.3v for both vcore and vtt and move from there. Want to get it stable first (or at least passing longer than 1 test) before tweaking things down
 
Okay, Prime was failing within a couple of minutes.

Now it fails 17 minutes (Test8 of the 1024K torture test). On one core. Others pass it.

My max temp was 77 C - already in a very warm room.

Here is a detailed breakdown of my settings. Is there any setting I can adjust or stands out as a big error on my part?

CPU............I7 920 D0 STEPPING
Motherboard... GIGABYTE X58A-UD3R REVISION 1.0
BIOS Version...F5
Ram............OCZ DDR3 TRI CHANNEL - 3 X 2GB 1333mhz 9-9-9-20 1.65V: http://www.overclockers.co.uk/showproduct.php?prodid=MY-151-OC&groupid=701&catid=8&subcat=1390



Advanced CPU Features:
CPU Clock Ratio ................................ [x21]
Intel(R) Turbo Boost Tech .................. ....[Enabled]
CPU Cores Enabled .............................. [All]
CPU Multi Threading ............................ [Enabled]
CPU Enhanced Halt (C1E) ................... .....[Disabled]
C3/C6/C7 State Support ......................... [Disabled]
CPU Thermal Monitor ......................... ...[Disabled]
CPU EIST Function .............................. [Disabled]
Virtualization Technology ...................... [Disabled]
Bi-Directional PROCHOT ......................... [Disabled]


Uncore & QPI Features:
QPI Link Speed ................................. [x36]
Uncore Frequency ................................[X12]
Isonchronous Frequency ..........................[Disabled]


Standard Clock Control:
Base Clock (BCLK) Control ................ ......[Enabled]
BCLK Frequency (MHz) ............................[191]
PCI Express Frequency (MHz) ........... .........[100]

C.I.A.2 [Disabled]

Advanced Clock Control:
CPU Clock Drive .................................[700mV]
PCI Express Clock Drive ........................ [700mV]
CPU Clock Skew .............................. ...[0ps]
IOH Clock Skew ................................. [0ps]


Advanced DRAM Features:
Performance Enhance .............................[Standard]
System Memory Multiplier (SPD) ..................[x6]
DRAM Timing Selectable (SPD) ....................[Quick]

Channel A + B + C

Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ...........................[x9]
tRCD .......................................[x9]
tRP ........................................[x9]
tRAS .......................................[x20]
Commandrate.................................[CMD1]



Advanced Voltage Control:

CPU
Load Line Calibration ................. .[LLC1]
CPU Vcore................................[1.3V]<< reads as 1.280 under Prime95 load in CPU-z
QPI/VTT Voltage..........................[1.31500]<<reads as 1.1750 (power on) in Easy Tuner 6
CPU PLL 1.800v...........................[AUTO]

MCH/ICH
PCIE.....................................[AUTO]
QPI PLL..................................[AUTO]
IOH Core.................................[AUTO]
ICH I/O..................................[AUTO]
ICH Core.................................[1.1]

DRAM
DRAM Voltage 1.500v .....................[1.66V]
DRAM Termination 0.750v..................[AUTO]
Ch-A Data VRef. 0.750v.................. [AUTO]
Ch-B Data VRef. 0.750v.................. [AUTO]
Ch-C Data VRef. 0.750v.................. [AUTO]
Ch-A Address VRef. 0.750v............... [AUTO]
Ch-B Address VRef. 0.750v............... [AUTO]
Ch-C Address VRef. 0.750v............... [AUTO]
 
Last edited:
Better :)

1024k tests are testing a lot more on the memory controller and RAM, for now I would say nudge vtt up and retest, if it fails note down what test and if it gets further. Find the point where increasing it further has no effect and go back to that as it will likely be the sweetspot for this clock, then you can start tweaking the vcore as that may need an increase as well - but do one at a time for the moment.

I also believe that using Level 2 LLC is a bit more aggresive with the LLC so it may not droop down as much under load, would be worth trying that first before increasing the vcore
 
PaulyD said:
Better :)

1024k tests are testing a lot more on the memory controller and RAM, for now I would say nudge vtt up and retest, if it fails note down what test and if it gets further. Find the point where increasing it further has no effect and go back to that as it will likely be the sweetspot for this clock, then you can start tweaking the vcore as that may need an increase as well - but do one at a time for the moment.

I also believe that using Level 2 LLC is a bit more aggresive with the LLC so it may not droop down as much under load, would be worth trying that first before increasing the vcore
Click to expand...

I've just run Prime95 Torture test - Blend. I've ran it for 2 hours and 5 minutes and then got an illegal sumout error on one core/worker.

All I've done to get this far is up the QPI/VTT to 1.355V

Shall I up that a bit more or the Vcore?

Core voltage read 1.264V under Prime Load, and 1.280V under idle.
 
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