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18-07-2009, 03:30 PM
#6 (permalink)
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Max BCLK Preliminary Testing
I started testing memory clocks first but one thing led to another, I ended up pushing BCLK frequency somewhat, so decided to see how Asus P6T6 WS Revolution faired in terms of BCLK. This i7 920 3836A756 C0 cpu on DFI UT X58-T3EH8 booted easily to 227-228bclk from bios into windows for super pi 32m with max validation between 231-235bclk all on TRUE120 air cooling.
On Asus P6T6 WS Revolution seems the initial ceiling is similar, in that can boot from bios straight into windows at up to 228bclk with only bumping IOH voltage from 1.1v to 1.20/1.22v and QPI/DRAM (uncore = CPU VTT) volts of 1.3875-1.400v with PCI-E frequency of 103mhz. Managed to pull of 225bclk for Super Pi 1M and 8M but not 32M stable and 228bclk validation at the same voltages.
Issue: Came across my first issue on this board, for some reason I can't set Uncore/CPU VTT voltage (what Asus calls QPI/DRAM volts) to a value >1.400v without after exiting bios, with boot up screen running into blank screen with POST CODE = 31 which isn't in the manual of listed POST CODES ??? If I set to 1.400v QPI/DRAM or less can get into windows at 226-228bclk easily. Something, I'll need to investigate later
Click image for full screenshots
228.3Bclk
Super Pi 1M & 8M @225.8Bclk
System:
Bios Settings Used
Code:
****************************
AI Tweaker
****************************
AI Overclock Tuner: Manual
CPU Ratio Setting: 18X
BCLK Frequency: 226-228
PCIE Frequency: 103
DRAM Frequency: DDR3-1806-1826Mhz
UCLK Frequency: 3612-3652Mhz
QPI Link Data Rate: AUTO
*******************
DRAM Timing Control
*******************
DRAM CAS Latency: 9 DRAM Clock
DRAM RAS# to CAS# Delay : 9 DRAM Clock
DRAM RAS# PRE Time: 9 DRAM Clock
DRAM RAS# ACT Time: 24 DRAM Clock
DRAM RAS# to RAS# Delay: AUTO
DRAM REF Cycle Time: AUTO
DRAM WRITE Recovery Time: AUTO
DRAM READ to PRE Time: AUTO
DRAM FOUR ACT WIN Time: AUTO
DRAM Back-To-Back CAS# Delay: AUTO
DRAM Timing Mode: AUTO
DRAM Round Trip Latency on CHA: AUTO
DRAM Round Trip Latency on CHB: AUTO
DRAM Round Trip Latency on CHC: AUTO
DRAM WRITE To READ Delay(DD): AUTO
DRAM WRITE To READ Delay(DR): AUTO
DRAM WRITE To READ Delay(SR): AUTO
DRAM READ To WRITE Delay (DD): AUTO
DRAM READ To WRITE Delay (DR): AUTO
DRAM READ To WRITE Delay (SR): AUTO
DRAM READ To READ Delay(DD): AUTO
DRAM READ To READ Delay(DR): AUTO
DRAM READ To READ Delay(SR): AUTO
DRAM WRITE To WRITE Delay(DD): AUTO
DRAM WRITE To WRITE Delay(DR): AUTO
DRAM WRITE To WRITE Delay(SR): AUTO
****************************
CPU Voltage: 1.3750v
CPU PLL Voltage: 1.80
QPI/DRAM Core Voltage: 1.3875v
IOH Voltage: 1.22
IOH PCIE Voltage: 1.50
ICH Voltage: 1.10
ICH PCIE Voltage: 1.50
DRAM Bus Voltage: 1.64
DRAM DATA REF Voltage on CHA: AUTO
DRAM CTRL REF Voltage on CHA: AUTO
DRAM DATA REF Voltage on CHB: AUTO
DRAM CTRL REF Voltage on CHB: AUTO
DRAM DATA REF Voltage on CHC: AUTO
DRAM CTRL REF Voltage on CHC: AUTO
****************************
Load-Line Calibration: AUTO
CPU Differential Amplitude: AUTO
CPU Clock Skew: AUTO
CPU Spread Spectrum: Disabled
IOH Clock Skew: AUTO
PCIE Spread Spectrum: Disabled
CPU Advance Settings
C1E Support: Disabled
Hardware Prefetcher: Enabled
Adjacent Cache Line Prefetcher: Enabled
Intel (R) Virtualization Tech: Disabled
CPU TM Function: Disabled
Execute Disable Bit: Disabled
Intel (R) HT Technology: Enabled
Active Processor Cores: ALL
A20M: Disabled
Intel (R) C-State Tech: Disabled
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Express Gate: Disabled
Max BCLK Testing continued...
7 days ago, tried my first attempt at max bclk on i7 920 3836A756 C0 #2 cpu, and got to around 228bclk validation but no 32M Pi stability. Now after trial and error testing of bios settings and voltages, managed to pull off 230 bclk validation and 225.8 bclk for Super Pi 32M.
Asus TurboV windows app was pretty useful for testing different voltages within windows for Super Pi 32M. I used TurboV in conjunction with setFSB to start with 220 bclk boot from bios into windows and setFSB to 223 bclk for 32M Pi. Then after figuring out voltages tried 225 bclk boot from bios into windows and passed 32M Pi at 225 and 226 bclk.
230 bclk
220 bclk boot from bios, 32M Pi passed @220bclk, setFSB to 221bclk, 222bclk, and 223bclk.
click image for full screenshot.
220bclk
221bclk
222bclk
223bclk
225bclk boot from bios, 32M Pi passed @225bclk and setFSB to 226bclk.
225bclk
226bclk
PCI-E Frequency = 110mhz for all above tests.
System:
More tests to come
