RAM timing final touch

[mithrandir123]

Hi,
I've been having some problems with setting proper timing for my RAM.
I have 6GB Corsair RAM kit (TR3X6G1333C9) 1333MHz which I am trying to combine with Gigabyte X58A-UD3R mobo and i7 950 processor.

A lot has been written about this mobo and so far I was able to resolve most of its issues but I still have problem with RAM. The [auto] settings are plain wrong and crash any and all OS.

I was able to get a (relatively) stable system after I played with the RAM timing but I still get some memory errors when using all 3 modules. I have tried all modules separately and they work OK. I am not attempting to do any overclocking, I just want some working RAM at factory standard (which auto settings can't provide for some reason). The errors occur on the memory on third slot (Channel C), Memtest86+ reporing 2 wrong bits on several addresses (regardless of module used). I got this kind of error on roughly the same addresses for all combinations of modules across the slots with wrong timing.

So here are my settings, I'd appreciate any tips that will make it work possibly without killing performance more than necessary.
Info from manufacturer: 1333MHz, 9-9-9-24, 1.5V

My most stable settings:
1333MHz at 1.5V
CAS latency time: 9
tRCD: 9
tRP: 9
tRAS: 24
tRC: 34
tRRD: 4
tWTR: 4
tWR: 8
tWTP: 19
tWL: 7
tRFC: 60
tRTP: 4
tFAW: 16
Command rate: 1T
B2B CAS delay: none
Round trip latency: 60, 61, 63 (for channels A, B, C respectively)

The auto mode came up with 1066MHz, 8-8-8-20 and tRC=27.

Thanks

 

[beenthere]

Intel only guarantees that your i7-950 CPU will run RAM stable at 1066 MHz. not 1333 MHz. The only means to run the memory at 1333 MHz. is by overclocking it which may cause system instability/crashes.

http://ark.intel.com/Product.aspx?id=37150

Your could try 2T command rate but there is no guarantee your system will run stable with the RAM overclocked.

http://www.techreaction.net/2010/09/07/3-step-overclocking-guide-bloomfield-and-gulftown/

 

[mithrandir123]

Command rate T2 and changing the frequency to 1066MHz changed nothing. The third RAM module is still having problems.

Thanks for info though.

 

[redduc900]

Fill out this BIOS template for the X58A-UD3R w/ all of your current settings (just disregard the settings in the template, and replace w/ your own)...

Advanced CPU Features:
CPU Clock Ratio ................................ [20]
Intel(R) Turbo Boost Tech ................. [Disable]
CPU Cores Enabled .......................... [All]
CPU Multi Threading ..........................[Enable]
CPU Enhanced Halt (C1E) ................. [Disable]
C3/C6/C7 State Support ................... [Disable]
CPU Thermal Monitor ........................ [Disable]
CPU EIST Function ............................ [Disable]
Virtualization Technology ................. [Disable]
Bi-Directional PROCHOT .................... [Enable]

Uncore & QPI Features:
QPI Link Speed ..............................[x36] 7.2GHz
Uncore Frequency ..........................[x16] 3200MHz
Isonchronous Frequency ..................[Enable]
NB Frequency ................................3200Mhz

Standard Clock Control:
Base Clock (BCLK) Control .................. [Enable]
BCLK Frequency (MHz) .........................[200]
PCI Express Frequency (MHz) ............. [Auto]
C.I.A.2........................................... ....... [-]

Advanced Clock Control:
CPU Clock Drive ..............................[800]
PCI Express Clock Drive ................ [900]
CPU Clock Skew ............................ [0]
IOH Clock Skew ............................. [0]

Advanced DRAM Features:
Performance Enhance .......................... [Standard]
Extreme Memory Profile (X.M.P) ........... [Disable]
System Memory Multiplier (SPD) ........... [ 8]
DRAM Timing Selectable (SPD) ............. [Quick]

Channel A + B + C

Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ..................[8]
tRCD ......................................[8]
tRP ........................................[8]
tRAS ......................................[20]
CR..........................................[2]
B2B........................................[-]

Load Line Calibration .................... [Standard]
CPU Vcore ......................................[1.325]
QPI/VTT Voltage 1.150v .................[1.20]
CPU PLL 1.800v ..............................[1.80]
PCIE 1.500v ...................................[Normal]
QPI PLL 1.100v ..............................[Normal]
IOH Core 1.100v ............................[Normal]
ICH I/O 1.500v ...............................[Normal]
ICH Core 1.1v ................................[Normal]

DRAM
DRAM Voltage 1.500v .............. [1.64]
DRAM Termination 0.750v.......... [Normal]
Ch-A Data VRef. 0.750v ...........[Normal]
Ch-B Data VRef. 0.750v ...........[Normal]
Ch-C Data VRef. 0.750v ...........[Normal]
Ch-A Address VRef. 0.750v ........[Normal]
Ch-B Address VRef. 0.750v ........[Normal]
Ch-C Address VRef. 0.750v ........[Normal]

 

[mithrandir123]

Here you go:

Advanced CPU Features:
CPU Clock Ratio ................................ [23]
Intel(R) Turbo Boost Tech ................. [Enabled]
CPU Cores Enabled .......................... [All]
CPU Multi Threading ..........................[N/A]
CPU Enhanced Halt (C1E) ................. [Disabled]
C3/C6/C7 State Support ................... [Disable]
CPU Thermal Monitor ........................ [Enabled]
CPU EIST Function ............................ [Enabled]
Virtualization Technology ................. [Enabled]
Bi-Directional PROCHOT .................... [Enable]

Uncore & QPI Features:
QPI Link Speed ..............................[Auto] 4.8GHz
Uncore Frequency ..........................[Auto] 2667MHz
Isonchronous Frequency ..................[Enable]
NB Frequency ................................N/A

Standard Clock Control:
Base Clock (BCLK) Control .................. [Disbaled]
BCLK Frequency (MHz) .........................[133]
PCI Express Frequency (MHz) ............. [Auto]
C.I.A.2........................................... ....... [-]

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 .......................... [Turbo]
Extreme Memory Profile (X.M.P) ........... [N/A]
System Memory Multiplier (SPD) ........... [ 10]
DRAM Timing Selectable (SPD) ............. [Expert]

Channel A + B + C

Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ..................[9]
tRCD ......................................[9]
tRP ........................................[9]
tRAS ......................................[24]
tRC.........................................[33]
tRRD.........................................[4]
tWTR........................................[4]
tWR.........................................[8]
tWTP.......................................[19]
tWL.........................................[7]
tRFC........................................[60]
tRTP........................................[4]
tFAV........................................[20]
CR..........................................[1]
B2B........................................[-]
Round Trip Latency....................[57]

##Channel B Standard Timing Control##
Round Trip Latency....................[59]

##Channel C Standard Timing Control##
Round Trip Latency....................[61]

Load Line Calibration .................... [Standard]
CPU Vcore ......................................[1.23125V]
QPI/VTT Voltage 1.150v .................[1.20V]
CPU PLL 1.800v ..............................[1.80V]
PCIE 1.500v ...................................[Normal]
QPI PLL 1.100v ..............................[Normal]
IOH Core 1.100v ............................[Normal]
ICH I/O 1.500v ...............................[Normal]
ICH Core 1.1v ................................[Normal]

DRAM
DRAM Voltage 1.500v .............. [1.5V]
DRAM Termination 0.750v.......... [Normal]
Ch-A Data VRef. 0.750v ...........[Normal]
Ch-B Data VRef. 0.750v ...........[Normal]
Ch-C Data VRef. 0.750v ...........[Normal]
Ch-A Address VRef. 0.750v ........[Normal]
Ch-B Address VRef. 0.750v ........[Normal]
Ch-C Address VRef. 0.750v ........[Normal]

 

[Bobnova]

The very first thing i would do would be to take the dimm out of the slot that is getting errors and inspect all the little pins in the socket. Look for something bent, corroded, covered with lint, mangled, eaten, etc.

Then i would try populating the first slot (unless it'll boot without that slot populated) and the error prone slot, but no others.

 

[mithrandir123]

I was thinking the same.
I have already tested all three slots separately with single module, all three RAMs separately, combinations of 2 and permutations of 3.
The problem only occurs at third slot (channel C) when all three RAMs are plugged in.