CMX4GX3M2A1600C8 x 2 and GA-P55A-UD5

Hi, I've got stability issues with 4x2GB Corsair sticks CMX4GX3M2A1600C8. With 2 modules I've got no problems but with 4 modules my system fails LinX stress test. Memories are designed to work @1600 8-8-8-24 1.65v and XMP profile1 sets parameters correctly.

 

GA-P55A-UD5 with last bios F13B. Also tried with bios F9 (before changes about memory compatibility)

 

No errors after 4 passes of memtest86. (4.30 hours)

 

The following parameters that I used always failed LinX stress test:

 

"Intel Turbo Boost" is always disabled.

_________________________________________________

 

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [160MHz]

System Memory Multiplier = Auto

Memory Frequency (Mhz) = 1600

CPU Clock Ratio: {20*160=3200GHz};

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = Auto or 10.0

Memory Frequency (Mhz) = 1600

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = Auto

Set QPI/Vtt Voltage = 1.200V

Set DRAM voltage = Auto

... = Auto

____________________________________________________

 

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [160MHz]

System Memory Multiplier = 10.0

Memory Frequency (Mhz) = 1600

CPU Clock Ratio: {20*160=3200GHz};

 

Extreme Memory Profile (X.M.P.) = [Disabled]

System Memory Multiplier (SPD) = 10.0

Memory Frequency (Mhz) = 1600

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (9-9-9-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = Auto

Set QPI/Vtt Voltage = 1.200V

Set DRAM voltage = 1.66v

... = Auto

____________________________________________________

 

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [160MHz]

System Memory Multiplier = 10.0

Memory Frequency (Mhz) = 1600

CPU Clock Ratio: {20*160=3200GHz};

 

Extreme Memory Profile (X.M.P.) = [Disabled]

System Memory Multiplier (SPD) = 10.0

Memory Frequency (Mhz) = 1600

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Manual (9-10-9-27)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = Auto

Set QPI/Vtt Voltage = 1.200V

Set DRAM voltage = 1.66v

... = Auto

____________________________________________________

 

What settings should I try to get the system stable?

hi did u check for bios update?

As it improve sability and compatibility

 

U just ave to able XMP profil to set memory

Are u runing CPU at 3.2GHz with out Intel Turbo Boost

That meen that u ave overclock CPU as it run at 2.66GHz

If u OC CPU Clock Ratio you will incress memory speed

So if u set memory at 1600MHZ and OC CPU after your memory run faster then 1600MHz and was not made for that

 

Did you test all memory stick individualy?

To see if one is defect

 

Your 2 kit of memory as been purchase at the same time and is the same revision

As it never good to mixte memory kit even if it is the same model

 

Hope this help

Sincerly yours

MB bios is the latest. To get 1600Mhz I have to OC blck to 160 because @ stock is 133 and ram go to 1333. With 1 kit (2x2Gb) it works without problems with these settings.

 

Kits have different revision numbers: one is 3.2 and the other is 6.xx.. can be this the problem?

 

I have to test single sticks but with memtest 86 all together I have no errors.

 

Maybe I have to raise up latency?

 

Thank you for help.

it never good to mix memory kit

Even worse if it not the same version

Did you try to able XMP profile with out OC blck to 160 because

As you system could be unstable because you have OC blck

Yes, it's unstable @stock speed too (Memory @1333 and BLCK @133) with XMP enabled and all parameters to Auto (CPU@2666 and with turbo @3200). With 2 sticks it was stable @1333 and @1600 too so I think that that's the problem. Maybe there are some "tricks" to do with BIOS settings before to sell the ram sticks.

Set bios to default then able XMP

It sould do the trick

If With 2 sticks it was stable @1333 and @1600

The deferent version of your memory sould bee the issue

Ok, I'll try now!

If With 2 sticks it was stable @1333 and @1600

The deferent version of your memory sould bee the issue

Version number is irrelevant. Even if they were the same it would still be considered mixing kits. and the end result will likely be the same.

OK, finally I finished a LinX session without errors, these are my settings:

 

Downgraded BIOS from F13B to F12 (don't know if it's important).

 

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [166MHz]

Memory Frequency (Mhz) = 1333

CPU Clock Ratio: {20*166=3320GHz};

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 8

Memory Frequency (Mhz) = 1333

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = Auto

Set QPI/Vtt Voltage = Auto

Set DRAM voltage = Auto

... = Auto

Ok now I'm sure that's a memory issue!

 

This setting is working perfectly:

______________________________________________

 

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [166MHz]

Memory Frequency (Mhz) = 1333

CPU Clock Ratio: {20*166=3320GHz};

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 8

Memory Frequency (Mhz) = 1333

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = 1.25v

Set QPI/Vtt Voltage = Auto

Set DRAM voltage = Auto

... = Auto

________________________________________________

 

These settings fail everytime LinX:

 

________________________________________________

 

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [160MHz]

Memory Frequency (Mhz) = 1666

CPU Clock Ratio: {20*160=3200GHz};

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 10

Memory Frequency (Mhz) = 1666

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = 1.25v

Set QPI/Vtt Voltage = Auto

Set DRAM voltage = Auto

... = Auto

_____________________________________________________

 

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [180MHz]

Memory Frequency (Mhz) = 1666

CPU Clock Ratio: {20*180=3600GHz};

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 6

Memory Frequency (Mhz) = 1200

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = 1.3v

Set QPI/Vtt Voltage = 1.28v

Set DRAM voltage = Auto

... = Auto

_________________________________________________

 

Have you got any suggestion to try to go over 3320mhz and have stability or should I move the thread to overclocking section?

 

Thanks for the help.

Do they pass at 1600mhz without the overclock to your CPU? With JUST XMP enabled?

Is it the XMP profile that overclock BCLK frequency?

 

U say it run

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [166MHz]

Memory Frequency (Mhz) = 1333

CPU Clock Ratio: {20*166=3320GHz};

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 8

Memory Frequency (Mhz) = 1333

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = 1.25v

Set QPI/Vtt Voltage = Auto

Set DRAM voltage = Auto

... = Auto

 

But u run memory at (SPD) = 8 to OC CPU

 

YOUR spec sould be

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [133MHz]

Memory Frequency (Mhz) = 1600

CPU Clock Ratio: {20*133=2.66GHz }; (Turbo 3.2GHz)

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 10

Memory Frequency (Mhz) = 1600

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = 1.25v

Set QPI/Vtt Voltage = Auto

Set DRAM voltage = Auto

... = Auto

 

Sincerly yours

Yes, XMP sets the BLCK to 160 and sets the multiplier to x17 so @ default + XMP is:

 

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [160MHz]

Memory Frequency (Mhz) = 1600

CPU Clock Ratio: {17*160=2720GHz};

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 10 (Auto)

Memory Frequency (Mhz) = 1600

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = Auto

Set QPI/Vtt Voltage = Auto

Set DRAM voltage = Auto

... = Auto

 

And it fails LinX.

 

On my MB you can not set BLCK @133 and ram @1600. If you have BLCK @133 ram can't go over 1333 (with spd to 10). If you want to set ram @1600 you must set blck at least @160.

sory i made a error

your (SPD) sould 12

 

YOUR spec sould be

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [133MHz]

Memory Frequency (Mhz) = 1600

CPU Clock Ratio: {20*133=2.66GHz }; (Turbo 3.2GHz)

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 12

Memory Frequency (Mhz) = 1600

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

U could reset bios to default and try to set memory manualy

In my MB there's not SPD 12 option. Max SPD is 10 so I can't set blck @133 and ram @1600. I made BIOS resets, also downgraded bios to the last "stable version" (instead of latest beta) but it's the same, ram fails LinX @1600 with 4 sticks all together.

 

Default speed without XMP and SPD 10 (20x133): Ram @1333 system is ROCK solid.

OC speed with XMP and SPD 8 (20x166): Ram @1333 system ROCK solid.

Default speed with XMP and SPD 10 (17x160): Ram @1600 system is solid but fails LinX at 3/4 test.

ok i see

Glad it worck then

Ok, now I'm working on OC. I'd like to raise up CPU speed to 3600 and have stability with RAM. What parameters I have to set?

 

I tried:

Base Clock(BCLK) Control [Enabled]

BCLK Frequency (Mhz) [200MHz]

CPU Clock Ratio: {18*200=3600GHz};

 

Extreme Memory Profile (X.M.P.) = [Profile1]

System Memory Multiplier (SPD) = 6

Memory Frequency (Mhz) = 1200

Performance Enhance = Standard

DRAM Timing Selectable (SPD) = Auto (8-8-8-24)

 

Load-Line Calibration = Auto

Set CPU Vcore Voltage = 1.30v

Set QPI/Vtt Voltage = 1.30v

Set DRAM voltage = Auto

... = Auto

 

But LinX fails. What can I try? I don't think that @1200 RAM is worse than @1333 so I think it's a problem with MB/ CPU stability.. or I'm wrong?

 

Thanks for help.

I had to remove 1 stick and now I'm with 3 sticks (6Gb). Here my configuration to have stable OC @3800:

 

 

Advanced Frequency Settings:

CPU Clock Ratio 19x

Advanced Core Features [Press Enter]:

Intel(R) Turbo Boost Tech. [Disabled]
CPU Cores Enabled [All]
CPU Enhanced Halt (C1E) [Enabled]
C3/C6/C7 State Support [Enabled]
CPU Thermal Monitor [Enabled]
CPU EIST Function [Enabled]
Bi-Directional PROCHOT [Enabled]

QPI Clock Ratio [Auto]

>>>>> Standard Clock Control <<<<<

Base Clock (BCLK) Control [Enabled]
BCLK Frequency [200]
Extreme Memory Profile (X.M.P.) [Enabled]
System Memory Multiplier (SPD) [8]
Memory Frequency (MHz) 1600 1600
PCI Express Frequency (MHz) [100]
C.I.A.2 [Disabled]

>>>>> Advanced Clock Control <<<<<

CPU Clock Drive [ 800mV]
PCI Express Clock Drive [ 900mV]
CPU Clock Skew [ 0ps]

Advanced Memory Settings:

Extreme Memory Profile (X.M.P.) [Enabled]
System Memory Multiplier (SPD) [8]
Memory Frequency (MHz) 1600 1600
Performance Enhance (SPD) [standard]
DRAM Timing Selectable (SPD) [Quick]
Profile DDR Voltage 1.65v
Profile QPI Voltage 1.15v
Channel Interleaving 6 [Auto]
Rank Interleaving 4 [Auto]

>>>>> Channel A

Channel A Timing Settings [Press Enter]:
Cas Latency Time 8 [Auto]
tRCD 8 [Auto]
tRP 8 [Auto]
tRAS 24 [Auto]

>>>>> Channel A Advanced Timing Control

tRC 41 [Auto]
tRRD 6 [Auto]
tWTR 6 [Auto]
tWR 12 [Auto]
tWTP 24 [Auto]
tWL 8 [Auto]
tRFC 88 [128]
tRTP 6 [Auto]
tFAW 30 [Auto]
Command Rate (CMD) 2 [Auto]

>>>>> Channel A Misc Timing Control

B2B Cas Delay - [Auto]
Round Trip Latency 54 [Auto]


***>>>>> Channel B

Channel B Timing Settings [Press Enter]:
Cas Latency Time 8 [Auto]
tRCD 8 [Auto]
tRP 8 [Auto]
tRAS 24 [Auto]

>>>>> Channel B Advanced Timing Control

tRC 41 [Auto]
tRRD 6 [Auto]
tWTR 6 [Auto]
tWR 12 [Auto]
tWTP 24 [Auto]
tWL 8 [Auto]
tRFC 88 [128]
tRTP 6 [Auto]
tFAW 30 [Auto]
Command Rate (CMD) 2 [Auto]

>>>>> Channel B Misc Timing Control

B2B Cas Delay - [Auto]
Round Trip Latency 57 [Auto]

Advanced Voltage Settings:

******Mother Board Voltage Control ******
Voltage Types............Normal......Current
--------------------------------------------

>>> CPU
Load Line Calibration................[Level 2]
CPU Vcore..................1.14~v..[1.25v]
QPI/VTT Voltage...........1.100v.....[1.300v]
>>> MCH/ICH
PCH Core....................1.050v.....[Auto]
CPU PLL......................1.800v....[Auto]
>>> DRAM
DRAM Voltage..............1.500v.....[Auto]
DRAM Termination..........0.750v.....[Auto]
Ch-A Data VRef............0.750v.....[Auto]
Ch-A Data VRef............0.750v.....[Auto]
Ch-B Data VRef............0.750v.....[Auto]
Ch-B Data VRef............0.750v.....[Auto]

Miscellaneous Settings:

Isochronous Support...................[Enabled]
Virtualisation technology.............[Enabled]

 

6 Gb are enough for my needs but it's very strange that RAM is not fully compatible... thanks for the help!