Display driver crashing with 8 dimms

[anubis889]

I've posted this same question on the ASUS forums but was hoping to get a solution here. I have 2 sets of the F3-17000CL11Q-16GBZL RAM for 32 GB. I am currently running them at 1600MHz, but my display driver keeps crashing. It would crash when booting up or even loading web pages (Windows will restore it after a few seconds, but will continue to crash). After I remove 4 of the dimms, then everything runs fine. The system does recognize all 8 dimms correctly. The motherboard (P9X79) manual states that it supports 8 dimms of a similar module (F3-17000CL9Q-16GBXLD).

I'm trying to figure out why the 8 dimms would cause the display to keep crashing and how to remedy it. I have the voltages set at 1.65 as well as tried increased the VCCSA voltage and setting the load line calibration at high and compatibility at 120%.

[Tradesman]

COuld you post your BIOS settings, with two sets of sticks, they may not want to play together and will require increased DRAM, VCCSA (prob 1.25-1.27) and VCCIO voltages, also at 1600 would need the base timings tightened down from the native CL11 (prob to CL9 or so

[anubis889]

I don't have screenshots, but the processor is the i7-3930k at 44x 1.35v and offset at 1.1. The RAM I've tried running it with XMP at 1.65v but system BSODs so I've been running them at 1600. I've tried setting the VCCSA up to 1.35v but that hasn't helped. I've left the other voltages in auto. Under Asus DIGI+ power control, I've also increased the VCCSA load line Calibration to High (50%) and incrased its Current capability to 120%. I don't see anything for VCCIO. After removing 4 DIMMS and leaving everything else the same, the system runs fine (although I still can't get it to run at 2133 without BSOD).

[Tradesman]

Do you have the latest BIOS? and what mobo do you have? Is it the stock P9X79, the Pro, the WS or the Deluxe (thinks there's only 4 off hand)?

[anubis889]

Yes, Bios is the most recent 0906. It is the P9X79 Deluxe.

[Tradesman]

Sorry on your mobo it's VTTCPU for MC voltage. Might try initially with 1 set of DRAM, enable XMP and if all goes well write down the BIOS settings, then disable XMP, and add the second set, set VCCSA to 1.25-1.27 or so, raise the VTTCPU to + .05 from the 4 stick setting, and raise DRAM voltage + .05 from stock

[anubis889]

Thanks, will try it out tomorrow and post results.

[Tradesman]

Let us know how it goes

[anubis889]

Just tried raising the voltages to: DRAM 1.7, VCCSA 1.27, VTTCPU 1.25. Display driver still crashes, I also get occasional system freezes. Not sure how much higher I can go with the voltages so stopped at those figures. On 4 DIMMS I run 1.1 VCCSA and 1.1 VTTCPU with no issues.

[Tradesman]

Could you post the BIOS settings

[anubis889]

My BIOS settings are:
Ai Overclock Tuner: Manual
BCLK Frequency: 100
CPU Strap: Auto
Clockgen Full Reset: Enabled
Turbo Ratio: By all Cores
By All cores: 44
CPU clock Gen Filter: Enabled
Memory Frequency: DDR3-1600MHz
EPU Power Saving Mode: Disabled

CPU Core Manual voltage: 1.365
CPU VCCSA Manual Voltage: 1.27 (4 DIMMS: 1.100)
DRAM Voltage (CHA, CHB): 1.7 (4 DIMMS: 1.6)
DRAM Voltage (CHC, CHD): 1.7 (4 DIMMS: 1.6)
CPU PLL Voltage: Auto (current 1.8)
VTTCPU Voltage: 1.25 (4 DIMMS: 1.1)
PCH 1.1v Voltage: Auto (current 1.1)
PCH 1.5v Voltage: Auto (current 1.5)
VTTDDR Voltage (CHA, CHB): Auto
VTTDDR Voltage (CHC, CHD): Auto
DRAM CTRL REF Voltage on CHA: Auto
DRAM DATA REF Voltage on CHA: Auto
DRAM CTRL REF Voltage on CHB: Auto
DRAM DATA REF Voltage on CHB: Auto
DRAM CTRL REF Voltage on CHC: Auto
DRAM DATA REF Voltage on CHC: Auto
DRAM CTRL REF Voltage on CHD: Auto
DRAM DATA REF Voltage on CHD: Auto
DRAM READ REF Voltage on CHA: Auto
DRAM READ REF Voltage on CHB: Auto
DRAM READ REF Voltage on CHC: Auto
DRAM READ REF Voltage on CHD: Auto
CPU Spread Spectrum: Auto
PCIE Spread Spectrum: Auto

DRAM Timing Controls
Primary Timings
DRAM CAS# Latency: 11/11/11/11
DRAM RAS# to CAS# Delay: 11/11/11/11
DRAM RAS# PRE Time: 11/11/11/11
DRAM RAS# ACT Time: 30/30/30/30
DRAM COMMAND Mode: 2/2/2/2
All other timings: Auto

DIGI+ Power Control
CPU Load-line Calibration: High
CPU Current Capability: 120%
CPU VCORE boot Up voltage: Auto
VCCSA Load-line Calibration: Regular
VCCSA Current Capability: 120%
CPU VCCSA Boot Up Voltage: Auto
CPU Voltage Frequency: Auto
CPU Spread Spectrum: Disabled
CPU Power Duty Control: T.Probe
CPU Power Phase Control: Optimized
DRAM-AB Current Capability: 120%
DRAM-AB Voltage Frequency: Auto
DRAM-AB Power Phase Control: Optimized
DRAM-CD Current Capability: 120%
DRAM-CD Voltage Frequency: Auto
DRAM-CD Power Phase Control: Optimized

[GSKILL TECH]

Try very basic settings first, without any other adjustments in BIOS. You need to determine whether the two kits can work together in the same system. X79 is very picky with memory, so it is very important to only use a single kit of memory.

Thank you
GSKILL TECH