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P7P55D PRO and GSKILL Ripjaws BSOD in Dual Channel

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September 17, 2009 2:49:36 PM

I have a pair of 2GB Ripjaws (F3-10666CL7D-4GBRH) in my new build for at dual channel total of 4BG:
I7 860 + Asus P7P55D Pro
Windows XP SP3 32 bit
ASUS 8600 GTS
Antec 430 NEO High Efficiency - reused (should be enough with the old vid card and minimal addons)
WD Caviar Black 1TB
DVD RW
Updated BIOS and latest drivers.

I am experiencing various BSODs in the form of:
MEMORY_MANAGEMENT, IRQ_NOT_LESS_OR_EQUAL, BAD_POOL_CALLER, PFN_LIST_CORRUPT... when doing browsing the web, playing a game, using media player doesn't really matter.

I have run memtest86:
dual channel - fail
single channel - pass (both tested separately)

Confusing Ram Timing Label Differences, how am I to know:
CPUZ Current Memory Speed: 9-9-9-24-72-2T
CPUZ JEDEC #4: @666 9-9-9-24-33 1.5V
CPUZ XMP1334: @667 7-7-7-19-31 1.6V
Sticker (on ram): 7-7-7-18 1.5V
GSkill Website: 7-7-7-21-2N 1.5V

Not sure what timings to set, nor do I know how since the BIOS has different names and more settings than I know what to do with.
Regardless, is it really timings if the failure is only in dual channel and they pass in single one at a time?
Asus does not have this exact Ram model as supported, but the Ram mfg has this mobo on their list... The store just picked them for me so I assumed they knew their stuff... but it is questionable.

Screen Shots Below:

General Bios Settings:
http://www.siriusweblabs.com/Images/p7p55dpro/bios-sett...

Bios Voltages:
http://www.siriusweblabs.com/Images/p7p55dpro/bios-volt...

Skew Control (whatever that is)
http://www.siriusweblabs.com/Images/p7p55dpro/skew_cont...

Slew Rate (whatever that is)
http://www.siriusweblabs.com/Images/p7p55dpro/slew_rate...

Timings Level 1
http://www.siriusweblabs.com/Images/p7p55dpro/timing-le...

Timings Level 2-3
http://www.siriusweblabs.com/Images/p7p55dpro/timing-le...

CPUZ Memory Timings in Dual Channel Mode
http://www.siriusweblabs.com/Images/p7p55dpro/cpuz_i860...

CPUZ Memory Timings in Single Channel (One stick)
http://www.siriusweblabs.com/Images/p7p55dpro/cpuz_i860...

Memtest with Both Sticks - Fail
http://www.siriusweblabs.com/Images/p7p55dpro/memtest_b...

Memtest Single Stick - Pass (tried both sticks separately in slot a1 and slot b1)
http://www.siriusweblabs.com/Images/p7p55dpro/memtest_1...

Help is appreciated, seems like one stick works but as soon as they are combined in dual channel, it becomes unstable. I need to get this PC working soon since I use it for work.
Should I trade them in for something else? I'd like to run the mobo with the features it provides rather than limiting its functionality, not sure if this is asking too much with today's mobos and Ram.

Thank you in advance.
a c 80 } Memory
September 17, 2009 8:15:38 PM

If you swap both modules, are the failures the same, i.e., same addresses and bit?
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September 18, 2009 3:06:52 PM

Well, i can try that... I figured the failures were random but perhaps not.
I have posted my specs on the GSkill forum and they have provided me with settings/timings to try. We'll see how it goes.

Here are the settings FYI:

IMC Voltage - 1.2V
DRAM Voltage - 1.6V

DRAM CAS Latency - 7
DRAM RAS to CAS Delay - 7
DRAM PRE Time - 7
DRAM ACT Time - 21
DRAM RAS to RAS Delay - 4
DRAM REF Cycle Time - 80
DRAM WRITE Recovery Time - 10
DRAM READ to PRE Time - 7
DRAM FOUR ACT WIN Time - 20

I'll post my results tonight.
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September 24, 2009 1:53:14 PM

Well after more testing and changing from one stick to another (running one at a time) it turned out that one of the sticks was bad, causing some BSOD although not often, I played games on it and nothing was crashing, but a couple of reboots experienced problems (cold boot especially).

I have exchanged the Ram for OCZ High Performance Low Voltage Platinum Series (which were $30 more) and the system is working well.

A final note however that the OCZ will require manual timing changes as they are currently running at a lower speed, I guess they dont have XMP built in...
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