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Reaching rated speed of 1866


PRJ

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Hi Guys

 

I would like to reach rated speeds of my memory, that is 1866 @ 9-9-9-24 1.65 v

 

I'm running 186 x 21, so it would be obvius to use memmory @ default rated speeds of 1866, just setting Dram frequency x 10 / Uncore x 20, but this would need some insanely high CPU VVT not ment for 24/7 setup...!!??

 

Here are my settings, any idéers or comments on those are most welcome.

 

Those of you that I've pasted from... Thanks

 

Genie BIOS Setting:

 

CPU Feature

Set VR Current Limit Max: Disabled

Thermal Management Control: Disabled

EIST Function: Enabled

CxE Function: Disabled

Execute Disable Bit: Disabled

Virtualization Technology: Disabled

 

***** Logical Processor Setting *****

Intel HT Technology: Enabled

Active Processor Cores: All

 

DRAM Timing

Memory Control Setting: AUTO

Memory LowGap: 2048M

 

DRAM Command Rate: 1N

CAS Latency Time (tCL): 8

RAS# to CAS# Delay (tRCD): 8

RAS# Precharge (tRP): 8

Precharge Delay (tRAS): 24

REF to ACT Delay (tRFC): AUTO

Write to PRE Delay (tWR): AUTO

Rank Write to Read (tWTR): AUTO

ACT to ACT Delay (tRRD): AUTO

Row Cycle Time (tRC): AUTO

Read CAS# Precharge (tRTP): AUTO

Four ACT WIN Time (tFAW): AUTO

 

Voltage Setting

O.C. Shut Down Free: Enable O.C.S.D.F

CPU VID Control: 1.40000v

CPU VID Special Add Limit: Enabled

CPU VID Special Add: Auto

Vcore Droop Control: Enabled

DRAM Bus Voltage: 1.650v

DRAM PWM Switch Frequency: Nominal

DRAM PWM Phase Control: 2 Phase Operation

CPU VTT Special Add: AUTO

CPU VTT Voltage: 1.26v

VTT PWM Switch Frequency: Nominal

VTT PWM Phase Control: 2 Phase Operation

CPU PLL Voltage: 1.80v

IOH/ICH 1.1V Voltage: 1.11v

IOH Analog Voltage: 1.10v

ICH 1.5 Voltage: 1.5v

ICH 1.05V Voltage: 1.05v

DIMM 1/2 DQ/DQSTB Bus VREF: -00.0%

DIMM 3/4 DQ/DQSTB Bus VREF: -00.0%

DIMM 5/6 DQ/DQSTB Bus VREF: -00.0%

ADDR/CMD VREF Control: Disabled

x DIMM 1/2 ADDR/CMD Bus VREF: 110

x DIMM 3/4 ADDR/CMD Bus VREF: 110

x DIMM 5/6 ADDR/CMD Bus VREF: 110

CPU QPI Drive Strength: Normal

IOH QPI Drive Strength: Normal

 

Exit Setup Shut down: Mode 2

O.C. Fail Retry Counter: Enabled

O.C. Fail CMOS Reload: Disabled

 

PPM Function: Enabled

Turbo Mode Function: Enabled

1 core Max Turbo Ratio: 22x

2 core Max Turbo Ratio: 21x

3 core Max Turbo Ratio: 21x

4 core Max Turbo Ratio: 21x

CPU Non-Turbo Clock Ratio: 20x

 

* BCLK/UCLK/QPI Controller Settings *

QPI Control Settings: Enabled

QPI Link Fast Mode: Enabled

QPI Frequency: AUTO

CPU Base Clock (BCLK): 186 Mhz

Boot Up CPU Base Clock: AUTO

PCIE Clock: 100 Mhz

DRAM Frequency: BCLK x 8 1488 MHz

UnCore Frequency: BCLK x 16 2976 MHz

 

CPU Spread Spectrum: Disabled

PCIE Spread Spectrum: Disabled

3_9GHz.thumb.jpg.ec987735bd39fc01ae7ae11d88e81f99.jpg

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You could always manually set the XMP profile settings for the memory. If they are too high for your tastes, see if you can tweak them down to lower settings. We have verified them to be stable in the lab of course but, it can vary a bit from board to board and from CPU to CPU, or the IMC.
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You could always manually set the XMP profile settings for the memory. If they are too high for your tastes, see if you can tweak them down to lower settings. We have verified them to be stable in the lab of course but, it can vary a bit from board to board and from CPU to CPU, or the IMC.

 

This is what I do for both my X58 boards. Set to XMP and tweak the settings. I have set to XMP and lowered the CPU VTT (For my particular CPU) from 1.6v to 1.52v. Keep in mind that even 1.6v for CPU VTT / QPI-DRAM voltage is NOT all that high.

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You could always manually set the XMP profile settings for the memory. If they are too high for your tastes, see if you can tweak them down to lower settings. We have verified them to be stable in the lab of course but, it can vary a bit from board to board and from CPU to CPU, or the IMC.

 

manually set the XMP profile, never tried that, where do i find them?

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I have looked through the DFI BIOS settings and can not find this Intel Spec. You might need to contact DFI and see if they have hidden it somewhere or if they have just left it out. DFI has a habit of making their BIOS's so different than any other BIOS that standardization is not easily found. Too much dicking around with them imo.

 

Here's a thread where you can research and ask if they have it. Again I reiterate that a 1.6 CPU Vtt is NOT insanely high by any means. The i7 runs with an Intel SPec of 1066Mhz DRAM on stock CPU vtt and you are setting to 1866Mhz.

 

http://www.xtremesystems.org/forums/showthread.php?t=213105

 

manually set the XMP profile, never tried that, where do i find them?
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That makes no sense. I run 1.52 with 1866 and there's no problems with 1.6+v. The people who are warning you must be using slow memory. Ask at XS.

 

Hi DerekT

 

Yes i think DFI just left XMS profiles out of their bios.

 

I Would like to raise the VVT, but have been warned not to go higher than 1.35 on DFI Forums and other forums.

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The Corsair approved and tested XMP values for the CPU VTT is 1.6v for these modules. I find it hard to understand how EVA could see such a statement that the lower the DRAM speed, the higher the VTT and the higher the DRAM speed the lower the VTT.

 

Edit: Now I see that the thread you posted by EVA is for a theory that EVA is asking for help testing, and that the next post of EVA shows the reality of a VTT of 1.6v.

 

At any rate, you can move to some 1333 and use a nice low VTT. I doubt if you will find stability with 1866C9 and less than 1.48v. But it does somewhat depend on the stability of the IMC.

 

http://i259.photobucket.com/albums/hh293/DerekT2008/si.jpg

 

I hope you're right, could be usefull to increase.

 

http://www.xtremesystems.org/forums/showpost.php?p=3652490&postcount=502

 

http://i4memory.com/103491-post2.html

 

***UPDATED****

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I would test. Set to 9-8-8-24, 9-8-8-20, 8-8-8-20.... Keep in mind that these modules have been binned and tested at 1333 9-9-9-24 and so any timings are a YRMV thing.

 

I'll leave the idéer on rasing the VVT, but what timings and settinghs could be expected @ DDR3 811
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