EP45-UD3P can't oc RAM over 1400

[nhuhoang]

I have a kit Transcend aXe 1200 1GBx2. At cas 5, it need only 2.54V to pass Pi 1M at 680MHz. When I raise the vdimm to 2.6,2.7,2.8V, it never pass Pi 1M at 690MHz, but can be valided at max 702 MHz.

At cas 6, I meet the same problem, only 2.2V to reach 670MHz and 2.3V to pass 680Mhz. But 2.5V can't pass 690Mhz

I don't understand some dram voltages reference and I think this is problem. I alway set auto to the settings. Can't somebody help me to ajust these Voltages?

This is my setting:

******Motherboard Intelligent Tweaker (M.I.T.)******

Robust Graphics Booster.........................[ Auto ]
CPU Clock Ratio.................................[ 7 ]
Fine CPU Clock Ratio............................[ + 0 ]
CPU Frequency .................................[ 340 x 7]

******Clock Chip Control******

CPU Host Clock Control..........................[ Enabled ]
CPU Host Frequency (Mhz)........................[ 340 ]
PCI Express Frequency (Mhz).....................[ 100 ]
C.I.A 2................................................. .....[ Disabled ]

******Advanced Clock Control******

CPU Clock Drive.................................[ 700mv ]
PCI Express Clock Drive.........................[ 700mv ]
CPU Clock Skew..................................[ 0ps ]
MCH Clock Skew..................................[ 0ps ]

******DRAM Performance Control******

Performance Enhance.............................[ Standard ]
(G) MCH Frequency Latch.......................[ 200 ]
System Memory Multipler....................[ 4.0C ]
Memory Frequency 1150.........................[ 1380 ]
DRAM Timing Selectable..........................[ Manual ]

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

******Advanced Timing Control******

tRRD[3].........................................[ auto ]
tWTR[3].........................................[ auto ]
tWR[6]..........................................[ auto ]
tRFC[54]........................................[ auto ]
tRTP[3].........................................[ auto ]
Command Rate (cmd)[0].............[ 2 ]

******Channel A Timing Settings******

Static tRead Value [ 8 ] ................[ auto ]
tRD Phase0 Adjustment [ 0 ] ................[ Auto ]
tRD Phase1 Adjustment [ 0 ] ................[ Auto ]
tRD Phase2 Adjustment [ 0 ] ................[ Auto ]
tRD Phase3 Adjustment [ 0 ] ................[ Auto ]

tRD 2rd (Differnt Rank) [ 6 ] ................[ Auto ]
tWR 2wr (Differnt Rank) [ 6 ] ................[ Auto ]
tWR 2rd (Differnt Rank) [ 5 ] ................[ Auto ]
tRD 2wr (Same/Difft Rank) [ 8 ] ................[ Auto ]

Dimm 1 Clock Skew Control.......................[ Auto ]
Dimm 2 Clock Skew Control.......................[ Auto ]
DDR Write Training..............................[ Auto ]

******Channel A Driving Settings******

Drive Strength Profile..........................[ Auto ]
Data Driving Pull Up Level......................[ Auto ]
cmd Driving Pull Up Level.......................[ Auto ]
ctrl Driving Pull Up Level......................[ Auto ]
clk Driving Pull Up Level.......................[ Auto ]

Data Driving Pull Down Level....................[ Auto ]
cmd Driving Pull Down Level.....................[ Auto ]
ctrl Driving Pull Down Level....................[ Auto ]
clk Driving Pull Down Level.....................[ Auto ]

******Channel B Timing Settings******

Static tRead Value [ 8 ] ................[ Auto ]
tRD Phase0 Adjustment [ 0 ] ................[ Auto ]
tRD Phase1 Adjustment [ 0 ] ................[ Auto ]
tRD Phase2 Adjustment [ 0 ] ................[ Auto ]
tRD Phase3 Adjustment [ 0 ] ................[ Auto ]

tRD 2rd (Differnt Rank) [ 6 ] ................[ Auto ]
tWR 2wr (Differnt Rank) [ 6 ] ................[ Auto ]
tWR 2rd (Differnt Rank) [ 5 ] ................[ Auto ]
tRD 2wr (Same/Difft Rank) [ 8 ] ................[ Auto ]

Dimm 1 Clock Skew Control.......................[ Auto ]
Dimm 2 Clock Skew Control.......................[ Auto ]
DDR Write Training..............................[ Auto ]

******Channel B Driving Settings******

Drive Strength Profile..........................[ Auto ]
Data Driving Pull Up Level......................[ Auto ]
cmd Driving Pull Up Level.......................[ Auto ]
ctrl Driving Pull Up Level......................[ Auto ]
clk Driving Pull Up Level.......................[ Auto ]

Data Driving Pull Down Level....................[ Auto ]
cmd Driving Pull Down Level.....................[ Auto ]
ctrl Driving Pull Down Level....................[ Auto ]
clk Driving Pull Down Level.....................[ Auto ]

******Motherboard Voltage Control******

Load-Line Calibration...........................[ Enabled ]
CPU Vcore [ 1.2125 ]........................[ 1.3250 ]
CPU Termination [ 1.20 ]...................[ 1.2400 ]
CPU PLL [ 1.50 ]...............................[ 1.50 ]
CPU Reference [ 0.760 ]...................[ 0.76 ]

MCH Core [ 1.100 ]........................................[ 1.2400 ]
MCH Reference [ 0.760 ].................................[ 0.763 ]
MCH/DRAM Refernce [ 0.900 ]...................[ auto ]
ICH I/O [ 1.500 ]...........................................[ 1.500 ]
ICH Core [ 1.100 ].........................................[ 1.100 ]

DRAM Voltage [ 1.800 ].........................[ 2.6 V]
DRAM Termination [ 0.900 ]...................[ auto ]
Channel A Ref [ 0.900 ]..........................[ auto ]
Channel B Ref [ 0.900 ]..........................[ auto ]

******Advanced BIOS Features******

Limit CPUID Max to 3..............................[ Disabled ]
No-Execute memory Protect..................[ Disabled ]
CPU Enhance Halt (CIE)..........................[ Disabled ]
C2/C2E State Support............................[ Disabled ]
C4/C4E State Support............................[ Disabled ]
CPU Thermal Monitor.............................[ Disabled ]
CPU EIST Function...............................[ Disabled ]
Virtualization Technology.......................[ enable ]

[morph]

Re: EP45-UD3P can't oc RAM over 1400

Have you tryed givin' MCH more voltage? Like 1.28-1.30V or even higher? Also, try setting tRD (Static tRead Value) manually and changing strap to B or D. The lower the strap is, the higher the stress on the MCH. And your quest for higher memory frequency makes it even harder for the MCH to handle all that.

[nhuhoang]

Re: EP45-UD3P can't oc RAM over 1400

Have you tryed givin' MCH more voltage? Like 1.28-1.30V or even higher? Also, try setting tRD (Static tRead Value) manually and changing strap to B or D. The lower the strap is, the higher the stress on the MCH. And your quest for higher memory frequency makes it even harder for the MCH to handle all that.

Many thank

I also change strap to 4.0B and set tRD to 10, but it is unuseful. Then, I set vNB to 1.4 and now I can Pi 1M at 690MHz (1.3V also can't Pi), vdimm 2.3V (6-6-6-18).

I think tRD is Performance Lever. So the higher the tRD is, the higher DRAM I can reach? But in my mobo, I can't boot with the tRD set to 11 or higher

More problem, I can't see the strap 4.0D in both bios F9 and F10b, EP45-UD3P rev1.1 :(

[morph]

Re: EP45-UD3P can't oc RAM over 1400

Unfortunatelly, there isn't a 4.0D strap. 3.33D is the higher you can get on D strap.
Indeed, tRD is also refered to as Performance Level. Yes, it is possible that if you set a higher tRD you could overclock more than with a lower one, but that is because the stress you put one the MCH is lower with a higher tRD, and also depends of the voltage you are willing to apply.
Take a look at this very interesting article, it sure helped me a lot improve my timings and overall system performance: AnandTech: ASUS ROG Rampage Formula: Why we were wrong about the Intel X48

[kick]

Re: EP45-UD3P can't oc RAM over 1400

that is some kind of d9 ram that is no longer made yes?

perhaps the board + extreme voltage ram just dont work well together.

[stasio]

Re: EP45-UD3P can't oc RAM over 1400

nhuhoang,why you didn't try with different Multiplier and Bus Speed;eg...
9x438 (with 5:8 strap 333)
Sample:
VDimm=2.56v

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[nhuhoang]

Re: EP45-UD3P can't oc RAM over 1400

Thank all, but I can't Pi at 700MHz with vdimm up to 2.8V, strap 4.0B and 3.2B (5:8), vNB 1.44V, tRD 9 (max value bootable). Does these below setting effect my result?

MCH/DRAM Refernce [ 0.900 ]...................[ auto ] (1.1V not boot)
ICH I/O [ 1.500 ]...........................................[ 1.500 ]
ICH Core [ 1.100 ].........................................[ 1.100 ]

DRAM Voltage [ 1.800 ].........................[ 2.6 V]
DRAM Termination [ 0.900 ]...................[ auto ] (1.1V not boot)
Channel A Ref [ 0.900 ]..........................[ auto ] (1.1V not boot)
Channel B Ref [ 0.900 ]..........................[ auto ] (1.1V not boot)

@kick: I sure my aXe is D9GMH (at ramlist), I bought it 2 years ago

nhuhoang,why you didn't try with different Multiplier and Bus Speed;eg...
9x438 (with 5:8 strap 333)
Sample:
VDimm=2.56v

PctunerUP! | PcTuner.net Images Upload Sevice

@stasio: Could you show me the setting in Bios?

[kick]

Re: EP45-UD3P can't oc RAM over 1400

MCH/DRAM Refernce [ 0.900 ]...................[1.3v]
ICH I/O [ 1.500 ]...........................................[ 1.500 ]
ICH Core [ 1.100 ].........................................[ 1.100 ]

DRAM Voltage [ 1.800 ].........................[ 2.6 V]
DRAM Termination [ 0.900 ]...................[1.3v]
Channel A Ref [ 0.900 ]..........................[1.3v]
Channel B Ref [ 0.900 ]..........................[1.3v]



The Dram ref voltages if you use them are supposed to be up to 50% of the Dram voltage.
ie for 2.2v 1.1v max should work or 2.8v 1.4v ref max.