Gigabyte GA-P67A-UD5 Discussion Thread

[C-N]

PCI Diagnostic Card

No need to be without.... just search "PCI Diagnostic Card" on E-Bay & you'll find hundreds from £1 up!!!!



Voltage Read Points

Not my work more of a re hash of what Sin done for the UD7 with a few small differences due to UD5 being slightly different



Sandybridge Specs, datasheets etc

Specification / SSpec etc
http://ark.intel.com/ProductCollecti...e=Sandy+Bridge

Datasheet

Volume 1
http://download.intel.com/design/pro...hts/324641.pdf

Volume 2
http://download.intel.com/design/pro...hts/324642.pdf

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Unable to adjust BCLK in Easy Tune Fix

http://www.xtremesystems.org/forums/...&postcount=451

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Update backup BIOS

Disable quick boot, press & hold down Alt + Tap F12 as seen as you see the post screen (Thanks to lsdmeasap for the tip)
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Swap main to backup bios

Disable quick boot, press & hold down Alt + Tap F12 3 times as seen as you see the post screen

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CPU-Z v1.56.3 Beta

Reads vcore correctly : http://www.xtremesystems.org/forums/...&postcount=385


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dinos22 Overclocking Guide

http://www.youtube.com/watch?v=8ngyUrjuQ80

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Latest BIOS

http://forums.tweaktown.com/gigabyte...test-bios.html

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Tips, Tricks & Observations

Got to start somewhere so here's what works for me & as we discover more I'll add them in.

Advanced CPU Core Features

CPU Clock Ratio - Default 33 on my i5 2500k & 34 on the i7 2600k

Internal PLL Overvoltage - My 2500K boots x49 on F2,3,4 & 5 Bios & x54 with the F5x Bios including the Internal PLL Override. My 2600K boots x53 disabled & x57 enabled.

Real Time Ratio Changes In OS - Enables & Disables ratio changes in Easytune, also when set enabled overrides Turbo boost.

Intel(R) Turbo Boost Tech
Turbo Ratio (Core 1)
Turbo Ratio (Core 2)
Turbo Ratio (Core 3)
Turbo Ratio (Core 4)
Turbo Power Limit (Watts)
Turbo Current Limit (Amps)

CPU Cores Enabled - Run 1,2,3 or 4 cores

CPU Enhanced Halt (C1E) - Disabled, tested & working & don’t appear to affect overclock if Enabled
C3/C6 State Support - Disabled, tested & working & don’t appear to affect overclock if Enabled
CPU Thermal Monitor - Disabled, tested & working & don’t appear to affect overclock if Enabled
CPU EIST Function - Disabled, tested & working & don’t appear to affect overclock if Enabled
Bi-Directional PROCHOT - Disabled, tested & working & don’t appear to affect overclock if Enabled

Advanced Frequency Settings

Spread Spectrum - New feature of F3 Bios, Disabled, untested
BCLK/DMI/PEG Clock Control - Enable BCLK Frequency Control

BCLK/DMI/PEG Frequency Control - Increase or Decrease BCLK e.g 98 x 45 = 4410MHz 102 x 45 = 4590MHz, useful to run CPU in between multiplier speed increases of 100MHz. Also adjusting this will increase/decrease RAM speed.

System Memory Multiplier (SPD) - 800, 1066, 1333, 1600, 1866, 2133 available.

Advanced Memory Settings:

Performance Enhance - Standard, Turbo, Extreme - auto sets memory timings tighter & tighter I have mine manually set.

DRAM Timing Selectable (SPD) - Sets RAM timings as per SPD

Channel Interleaving - Enabled boosts memory bandwidth.

Rank Interleaving - Enabled boosts memory bandwidth.

Channel A Timing Settings:

##Channel A Standard Timing Control##

CAS Latency Time - Very roughly 1000mb increase in bandwidth per drop in CAS i.e 9, 8, 7 & 1ns latency per drop.
tRCD - Auto runs fine & manual you need what you need to run as per your RAM
tRP - Auto runs fine & manual you need what you need to run as per your RAM
tRAS - Auto runs fine & manual you need what you need to run as per your RAM

tRC - Auto runs fine & manual you need what you need to run as per your RAM
tRRD - Auto runs fine & manual you need what you need to run as per your RAM
tWTR - Auto runs fine & manual you need what you need to run as per your RAM
tWR - Auto runs fine & manual you need what you need to run as per your RAM
tWTP - Auto runs fine & manual you need what you need to run as per your RAM
tWL - Auto runs fine & manual you need what you need to run as per your RAM
tRFC - Auto runs fine & manual you need what you need to run as per your RAM
tRTP - Auto runs fine & manual you need what you need to run as per your RAM
tFAW - Auto runs fine & manual you need what you need to run as per your RAM

Command Rate (CMD) 1T & 2T tested & work fine on all memory dividers.

IO Latency - Auto, have played with this didn’t find any benefit
Round Trip Latency - Auto, have played with this didn’t find any benefit

Channel B Timing Settings:

##Channel B Standard Timing Control##

CAS Latency Time - Same as channel A
tRCD
tRP
tRAS
tRC
tRRD
tWTR
tWR
tWTP
tWL
tRFC
tRTP
tFAW
Command Rate (CMD)
IO Latency
Round Trip Latency

Advanced Voltage Control:

CPU

Load Line Calibration - Auto, Standard, Level 1 & 2. I use Level 1 Level 2 PC wont post.

CPU Vcore - Default 1.24 @ 3.3GHz for my chip.

You need what you need to get into windows, too low hangs at splash screen, LinX is good to get vcore about right but I find I need one or 2 more bumps to pass 3DMARK03 CPU tests & surf the net. I also find I get BSOD 124 after a few hours even after being LinX/Prime stable requiring another small vcore bump to maintain 24/7 stability.

QPI/VTT Voltage 1.050v - Default works fine for everything I have done. I have lowered mine to 0.90v as thats all I need for DDR2133 @ 5GHz. LinX fails if you lower this voltage too much.

System Agent Voltage 0.925v - I find 0.935 ~ 0.945v optimum for everything I have done with my 2600K, too little or too much voltage caused Super Pi 32M to fail. My 2500K need even lower voltage.

PCH Core 1.050v - Default works fine for 5GHz at any RAM speed & a slightly overclocked 3870X2. Less voltage 3DMark wont run & more voltage shows no score improvement for me. I need 1.14~1.16 for 2 x 3870X2's to prevent the driver crashing in 3DMark benches.

CPU PLL 1.800v - Chip dependant, Default works fine for 5GHz on my 2500K, I have mine lowered to 1.58v for 5GHz as thats all I need to pass LinX & other tests.

DRAM

DRAM Voltage 1.500v - You need what you need for your sticks to run, I believe 1.65v is the safe max.

DRAM Vref 0.750v - Default is 50% of VDIMM, Mine is set auto.
DRAM Termination 0.750v - Default is 50% of VDIMM, Mine is set auto.
Ch-A Data VRef. 0.750v - Default is 50% of VDIMM, Mine is set auto.
Ch-B Data VRef. 0.750v - Default is 50% of VDIMM, Mine is set auto.
Ch-A Address VRef. 0.750v - Default is 50% of VDIMM, Mine is set auto.
Ch-B Address VRef. 0.750v - Default is 50% of VDIMM, Mine is set auto.

Miscellaneous Settings

Isochronous Support - Disabled, havent tested Enabled.
Virtualization Technology - Disabled, havent tested Enabled.