Asus P7P55D + 2*2Go F3-10666CL8-2GBHK Cold Boot Problem

[sylvain5312]

Configuration:

Motherboard: ASUS P7P55D
BIOS Ver: 915
RAM:2*2Go #F3-10666CL8-2GBHK
CPU: Intel, Lynnfield, Core i7 750

No OC, "auto" settings for RAM.



I have the same symptoms as several others.
At "Cold Boot', systematically, System crashes (Win 7 32 bits).

When I run Memtest86 v4.00 at "cold boot" : bunch of errors.

Then when I stop the PC completly and then restart, PC is rock stable no problem at all.

Here is what I obtain with CPU-Z when system is stable :
Chipset
-------------------------------------------------------------------------

Northbridge Intel DMI Host Bridge rev. 11
Southbridge Intel P55 rev. 05
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR3
Memory Size 4096 MBytes
Channels Dual
Memory Frequency 668.7 MHz (2:10)
CAS# latency (CL) 9.0
RAS# to CAS# delay (tRCD) 9
RAS# Precharge (tRP) 9
Cycle Time (tRAS) 24
Row Refresh Cycle Time (tRFC) 74
Command Rate (CR) 1T
Uncore Frequency 2139.9 MHz

and

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD000000)
Size 2048 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number F3-10666CL8-2GBHK
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.0
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-22 @ 444 MHz
JEDEC #2 7.0-7-7-19-26 @ 518 MHz
JEDEC #3 8.0-8-8-22-30 @ 592 MHz
JEDEC #4 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-1334
Specification PC3-10700
Voltage level 1.600 Volts
Min Cycle time 1.500 ns (667 MHz)
Min tRP 11.00 ns
Min tRCD 11.00 ns
Min tWR 15.00 ns
Min tRAS 31.25 ns
Min tRC 45.00 ns
Min tRFC 90.00 ns
Min tRTP 7.50 ns
Min tRRD 6.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 8.0-8-8-23-33-2T @ 727 MHz (1.600 Volts)


and thme same for Dimm #2

Have any clue to cold boot reliably and maintain a stable PC at first boot ?

Please Help.

Thanks in advance,

Sylvain5312

[Tradesman]

It looks like the Command Rate is your Bios is 1T, should be 2T.

[sylvain5312]

Hi,

Tested this morning (European time) at cold boot with xmp settings.

Same problem, lot of errors with memtest.

In asus bios, what is the equivalent to Command Rate. Not found in the settings for Dram.
Sorry, i'm a newbie.

Anyway, shoud I make a RMA this couple of Dimms ?

Thank for your help.

Sylvain5312

[sylvain5312]

OK, it seems to be "DRAM Timing Mode" (in Asus Bios) that should be set to 2N, am I right ?


Sylvain5312

[sylvain5312]

Retested cold boot with XMP settings and DRAM Timing Mode set to 2N

Still lot of errors with memtest86.

I stop the PC then restart. Everything OK.

Whats more, very strange, the DRAM settings (that were on default) are exactly the same between the first (bad) boot and the second (good) boot.

CPU-Z extract :
Chipset
-------------------------------------------------------------------------

Northbridge Intel DMI Host Bridge rev. 11
Southbridge Intel P55 rev. 05
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR3
Memory Size 4096 MBytes
Channels Dual
Memory Frequency 668.7 MHz (2:10)
CAS# latency (CL) 8.0
RAS# to CAS# delay (tRCD) 8
RAS# Precharge (tRP) 8
Cycle Time (tRAS) 21
Row Refresh Cycle Time (tRFC) 74
Command Rate (CR) 2T
Uncore Frequency 2140.0 MHz


DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD000000)
Size 2048 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number F3-10666CL8-2GBHK
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.0
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-22 @ 444 MHz
JEDEC #2 7.0-7-7-19-26 @ 518 MHz
JEDEC #3 8.0-8-8-22-30 @ 592 MHz
JEDEC #4 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-1334
Specification PC3-10700
Voltage level 1.600 Volts
Min Cycle time 1.500 ns (667 MHz)
Min tRP 11.00 ns
Min tRCD 11.00 ns
Min tWR 15.00 ns
Min tRAS 31.25 ns
Min tRC 45.00 ns
Min tRFC 90.00 ns
Min tRTP 7.50 ns
Min tRRD 6.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 8.0-8-8-23-33-2T @ 727 MHz (1.600 Volts)

DIMM # 2
SMBus address 0x52
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD000000)
Size 2048 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number F3-10666CL8-2GBHK
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.0
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-22 @ 444 MHz
JEDEC #2 7.0-7-7-19-26 @ 518 MHz
JEDEC #3 8.0-8-8-22-30 @ 592 MHz
JEDEC #4 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-1334
Specification PC3-10700
Voltage level 1.600 Volts
Min Cycle time 1.500 ns (667 MHz)
Min tRP 11.00 ns
Min tRCD 11.00 ns
Min tWR 15.00 ns
Min tRAS 31.25 ns
Min tRC 45.00 ns
Min tRFC 90.00 ns
Min tRTP 7.50 ns
Min tRRD 6.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 8.0-8-8-23-33-2T @ 727 MHz (1.600 Volts)

Should I request a RMA for the 2 dimms ?


Thank for your help.

Sylvain5312

[sylvain5312]

may i have some help ?

sylvain5312

[Tradesman]

Try setting tRFC to 195ish, with command rate at 2N

[sylvain5312]

I have sent a request for a RMA for the two dimms of DDR3.

I had the opportunity to test 2 dimms of another brand and there was no problem at all (especially on cold boot). I was wondering if the mobo had a problem but no because of the test with the other set of DDR3.

I really think that the the 2 GSkill DDR3 have a problem.

I prefer testing with new ones...

Anyway, thanks for you help.

Sylvain5312.

[Tradesman]

Sorry I couldn't have been of more help, still playing catchup, was out of touch for a few days due to a job commitment (didn't pay enough) but when you get the new sticks let us know what happens, I should be around fairly steady for at least the next three weeks, then I'm off to aother "on-site" job for 4 days, where I'll be limited, but GSkill Tech, GSkilll, should be around and Genetix and RamJam are showing up more and more along with others

[sylvain5312]

OK, no problem at all.

By reading other thread, I concluded that's the better was to make a RMA request to change those 2 dimms especially after the test with other branded DDR3.


I'll inform you of the results with the 2 new Gskill DDR3.

Thank for your help.

Sylvain5312.

[Tradesman]

Be looking forward to hearing how it goes,

Tman

[chtiprof]

Le probl?me ne vient pas de la ram je pense mais du bios de ta carte m?re. Les p55 ne sont pas encore ok.

Selon la ram, la carte m?re est stable ou pas.

[sylvain5312]

Sorry to answer in french to this reply that was in french.

J'ai, en effet, lu dans diff?rents forums que le P55 n'?tait pas optimal en terme de reconnaissance/stabilit? de la m?moire et c'est possible que le bios ne soit pas optimal. Mais j'ai le dernier bios en date et je fais avec ce que j'ai.

Avec des barrettes d'une autre marque (corsair pour ne pas la citer), je n'ai rencontr? AUCUN probl?me. Ceci ?limine d'office un probl?me de carte m?re.

Je pr?cise que je n'ai aucun lien d'aucune sorte avec corsair, asus ou une autre constructeur informatique quel qu'il soit.

Et, je n'accuse personne ni de mauvaise conception ou autre.

Je me contente de constater que
1) la m?moire GSkill que j'ai achet? ne fonctionne pas avec ma carte m?re.
2) une m?moire d'une autre marque fonctionne parfaitement.
3) et j'en conclus que les barrettes que GSkill que j'utilise doivent ?tre d?fectueuses.
4) Je n'en tire aucune conclusion ni sur GSKill en g?n?ral ni sur Asus ni sur un autre constructeur informatique.

Voila.

Un utilisateur bien malheureux de ne pouvoir utiliser "tranquillement" son PC.

Sylvain5312

[chtiprof]

i send you mp to response you in french ^^

[chtiprof]

Have you done memtest first to see if the rams are ok ?