F2-8500CL5D-4GBPK on GB EP45-DS4 - Boot Problem

[yiph]

BUMP...

Is there such thing as RAM not compatible with certain video card on a particular motherboard???

[Tradesman]

Not so much as video card, but there are problems that come up with the video card drivers, if you are using the latest , you could try dropping back one version....may also want to drop the tRFC to 64

[yiph]

Hi,

I'm back for this topic as I still don't understand why the RAM is not working properly at 1066.

I went out and bought another pair of the exact same RAM. Replace old RAM with the ones just bought, same problem. Updated to newest BIOS, still crashes in Windows (Vista x64).

I now running the two 4GB packs together in 8GB config. Still trying to find what is the correct setting to tune it so it is stable at 1066, not underclocked at 800.

Can anyone please assist?

updated BIOS setting:

Settings from BIOS (F10b):
**************************************
Robust Graphics Booster............ [Auto]
CPU Clock Ratio........................ [ 8X ]
Fine CPU Clock Ratio................. [+0.5]

CPU Host Clock Control.............. [Disabled]
CPU Host Frequency (Mhz)......... [ 333]
PCI Express Frequency (Mhz)...... [ AUTO]
C.I.A.2.................................... [Disabled]

Performance Enhance................ [Standard]
Extreme Memory Profile (X.M.P.).. [Disabled]
(G)MCH Frequency Latch............ [333Mhz]
System Memory Multiplier (SPD)... [3.20B]
Memory Frequency (Mhz)... 1066... 1066
DRAM Timing Selectable (SPD)..... [Manual]

CAS Latency Time............ 5...... [ 5 ]
tRCD.............................. 5...... [ 5 ]
tRP................................ 5...... [ 5 ]
tRAS............................ 15...... [ 15 ]

Advanced timing:
tRRD........................................[Auto]
tWTR........................................[Auto]
tWR.........................................[Auto]
tRFC........................................[60]
tRTP........................................[Auto]
Command Rate (CMD)..............[2T]

CPU Vcore.............................. [Auto]
CPU Termination..................... [Auto]
CPU PLL................................. [Auto]
CPU Reference....................... [Auto]

MCH Core................................ [1.200V]
MCH Reference......................... [Auto]
MCH/DRAM Reference............... [Auto]
ICH I/O................................... [Auto]
ICH Core................................. [Auto]

DRAM Voltage......................... [2.100V]
DRAM Termination................... [Auto]
Channel A Reference............... [Auto]
Channel B Reference............... [Auto]

====================================

These are screenshots from the tests:


First 2 minute of test, error showed up.


Another minute later, error address at 8616MB with only 8192MB installed ???



Return RAM back to 800Mhz, ran fine for 3 hours.

[GSKILL TECH]

Increase tRFC to 80, and MCH Core to 1.40V.

Thank you
GSKILL SUPPORT

[yiph]

Increase tRFC to 80, and MCH Core to 1.40V.

Thank you
GSKILL SUPPORT

Hi,

I have tried the setting you suggested, it made things worse.

Started memtest and it failed in 10 seconds, system interrupt error hang:



I have tried running MCH at 1.3V as well, still same problem. Backing tRFC down to 60 and 68 at MCH 1.3V and 1.4V still no luck of stable conditions. =[

[Tradesman]

Try DRAM voltage at 2.15 (it's safe), may have a fluctuation

[yiph]

Try DRAM voltage at 2.15 (it's safe), may have a fluctuation

What other setting should I keep/change with the 2.15V DRAM?

[yiph]

Update for this topic:

I have finally found a stable solution to running these RAM on the board!!


After days and nights of pulling my hair out from my skull, the stable solution was to LOWER the MCH voltage and tRFC timing. MCH lowered by 0.1V running at bare 1.000V and tRFC down back to 60. Magically it worked!

These are the settings used for the stable configuration:

Settings from BIOS (F10b):
**************************************
Robust Graphics Booster............ [Auto]
CPU Clock Ratio........................ [ 8X ]
Fine CPU Clock Ratio................. [+0.5]

CPU Host Clock Control.............. [Disabled]
CPU Host Frequency (Mhz)......... [ 333]
PCI Express Frequency (Mhz)...... [ AUTO]
C.I.A.2.................................... [Disabled]

Performance Enhance................ [Standard]
Extreme Memory Profile (X.M.P.).. [Disabled]
(G)MCH Frequency Latch............ [333Mhz]
System Memory Multiplier (SPD)... [3.20B]
Memory Frequency (Mhz)... 1066... 1066
DRAM Timing Selectable (SPD)..... [Manual]

CAS Latency Time............ 5...... [ 5 ]
tRCD.............................. 5...... [ 5 ]
tRP................................ 5...... [ 5 ]
tRAS............................ 15...... [ 15 ]

Advanced timing:
tRRD........................................[Auto]
tWTR........................................[Auto]
tWR.........................................[Auto]
tRFC........................................[60]
tRTP........................................[Auto]
Command Rate (CMD)..............[2T]

CPU Vcore.............................. [Auto]
CPU Termination..................... [Auto]
CPU PLL................................. [Auto]
CPU Reference....................... [Auto]

MCH Core................................ [1.000V]
MCH Reference......................... [Auto]
MCH/DRAM Reference............... [Auto]
ICH I/O................................... [Auto]
ICH Core................................. [Auto]

DRAM Voltage......................... [2.100V]
DRAM Termination................... [Auto]
Channel A Reference............... [Auto]
Channel B Reference............... [Auto]
*****************************************




I have been running memtest for 2 hours, no issues. Stress tested in Windows for another 2 hours, no issue so far.

Will continue to test and post back if I find any issue with this.

[Tradesman]

Congrats, some unusual settings, but if it works, have run into some oddballs like this, but not many.

[yiph]

Congrats, some unusual settings, but if it works, have run into some oddballs like this, but not many.

Although it worked through all the tests, I'm getting random unexpected crashes during HDD writes and video playback. I'm still trying to find a way to reproduce this, haven't got a clue what is causing this tho.

Very strange problem

[GSKILL TECH]

Keep MCH Core at 1.0V. Set tRFC to 80. Let us know how that goes.

Thank you
GSKILL SUPPORT