BIOS Settings

[johnnyl168]

[Lsdmeasap]

Re: BIOS Settings

Use command Rate 2 as one is not working in any P45 boards yet and 2 would be used no matter what you set

Auto Ref voltages will set the stock % as to whether or not those will be stable/correct is all up to your board and CPU as they are all different. Here is what each stock value is, and what changes what (Part of my P45 Guide I am working on) >>>

For me, All the references in ET6 are wrong or always show the same defaults. Why is this?

That is ONLY because ET Shows the .xx % of Vtt of what you set in the BIOS. The Default Value of MCH Ref is .63% of Vtt at stock of 1.20V, which is .756 (.76)

The Ref Settings in the BIOS are .xx % values of/X Vtt so this tends to throw off many users when they set something and then compare to EasyTune. So you need to keep the % amounts in mind when changing these Ref voltages, and it is easiest to do it at stock Vtt and then raise your Vtt back up to where you want to run it. If you Make any deviation from the stock % for MCH Ref of .63% the value will be reflected in ET

Here is Four Common examples of this, all using MCH Ref, and 1.30 Vtt (Termination). All of these but the last WILL Change what you see for MCH Ref in EasyTune as well. This way I hope you can see how this works, and then maybe better find your way to tuning your Ref voltages

*** Examples Below using 1.3 Vtt ***

(MCH Ref .68% AKA .68 in ET)
For example if you set 1.3 Vtt and .884 MCH Ref, ET would show .68 MCH Ref as .884 would be .68% of Vtt.

(MCH Ref .70% AKA .70 in ET)
Another example if you set 1.3 Vtt and .91 MCH Ref, ET would show .70 MCH Ref as .91 would be .70% of Vtt

(MCH Ref .72% AKA .72 in ET)
Another example if you set 1.3 Vtt and .936 MCH Ref, ET would show .72 MCH Ref as .936 would be .72% of Vtt

STOCK MCH Ref VALUES at .63% (To Help show how ET Seems to always show .76 for users)

First Example shows stock values for Ref used, .63%. That would be MCH Ref manually set but Value unchanged (.76) and then Vtt Raised to 1.3, or manually set to .819 and Vtt Manually set to 1.3..........

(Stock MCH Ref W/ 1.3 Vtt / .76 in ET)
If you set 1.3 Vtt and .819 MCH Ref ET would show .76 MCH Ref as .819 would be .63% of Vtt

This Example shows Stock Vtt and Stock MCH Ref used.........

(Stock MCH Ref W/1.20 Vtt or .76 in ET)
If you set 1.2 Vtt and .756 MCH Ref ET would show .76 MCH Ref as .756 would be .63% of Vtt.


That is just ONE example, and how to manipulate it, of the Many Ref Voltages in the BIOS Vs. what you see in Easytune. Here are all the values affected by other Values in the BIOS and their respective Percentages.

CPU Termination (Vtt) Automatically changes the following if manually set >>>

CPU Reference Voltage (.63% of Default Vtt/1.20) .76 ET
CPU Reference2 Voltage (.67% of Default Vtt/1.20) .80 ET
MCH Reference Voltage (.63% of Default Vtt/1.20) .76 ET

DRAM Voltage Automatically changes the following if manually set >>>

MCH/DRAM Reference Voltage (.50% of Default Dram Voltage)
DRAM Termination Voltage (.50% of Default Dram Voltage)
Channel A Reference Voltage (.50% of Default Dram Voltage)
Channel B Reference Voltage (.50% of Default Dram Voltage)

If you want a higher or lower than stock % / Value for any of the above settings you will find it easier to set the Dram Voltage or Vtt back to stock (Or above or below to find and be able to choose alternate % Values), then adjust desired setting to the % / Value you wish to use.

Then once you have selected a % range you want to use for said setting then go back and raise your Vtt or Dram Voltage back to what you choose to use and the corresponding settings will self adjust and still be set to the .xx % amount that you set them to.


Please give me a link to your ram and tell me how much you have, then I can give you some full optimal ranges for your setup

[johnnyl168]

Re: BIOS Settings

Here's the link to my memory, its the 5th one from the top.
TWIN2X2048-6400 PC2-6400 2GB Kit 5-5-5-18 240pin DIMM
Welcome to Corsair :: XMS2 Product Information

I'm a little lost with the figures for obtaining your reference voltages. If I was to set my VTT to 1.22 for example what would my CPU and MCH reference be? And also as I have set my Ram voltage to 2v what will I need to set my DRAM Termination, MCH/DRAM reference and Channel A Reference and my Channel B Reference to? Thanks

[johnnyl168]

Re: BIOS Settings

Also been getting some random boot failures where I get to the login screen and then the PC shuts down. Ran Intel Burn test, couple of hours of COD 4 and 3dmark vantage without and problems. No BSOD or lock ups seems very stable in windows. Probably just need to up my MCH or ICH voltage a little more? Thanks

[Lsdmeasap]

Re: BIOS Settings

Well that would be this one correct? Just asking to be sure since you did not post the link to it >>>

http://www.corsairmemory.com/products/go.aspx?pn=TWIN2X2048-6400

If you set Vtt to 1.22 your CPU and MCH Ref voltages would be whatever you want them to be. Did you mean by defaults? Well you could either set them all with Vtt at 1.2 and then raise it or just leave them in Auto and they will be correct. The default % is noted above, if you wanted to stray from that value I would need to know what % you want to use for each to advise you on how to set that up if you cannot get it.

Same applies to Dram ref's as I said above

Please give me your full settings you are using and I will advise back

[johnnyl168]

Re: BIOS Settings

Yea they are the ones.

My current settings were listed in my first post. Up to you on what I should be adjusting my voltages for my 475fsb. Looking forward to your template for my current configuration. Thanks

[Lsdmeasap]

Re: BIOS Settings

Ok, This is what ranges would be optimal for your 475 setup >>>

MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto or Fast
CPU Clock Ratio ..........................: 8
Fine CPU Clock Ratio.....................:.0
CPU Frequency ...........................: 3800


Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Enabled]
CPU Host Frequency (Mhz) ............: 475Mhz
PCI Express Frequency (Mhz) .........:Set to 100

C.I.A.2 .................................:[Disabled]


Advanced Clock Control [Press Enter]
CPU Clock Drive...........................: <<< 800mv
PCI Express Clock Drive.................: <<< 900mv
CPU Clock Skew (ps)....................: <<< 0ps
MCH Clock Skew (ps)...................: <<< 0ps


DRAM Performance Control
Performance Enhance...................: [STANDARD]
Extreme Memory Profile (X.M.P.).....: Disabled
(G)MCH Frequency Latch...............: Auto
System Memory Multiplier ..............: 2.00B
Memory Frequency (Mhz) ..............: 950
DRAM Timing Selectable ................: [Manual]

Standard Timing Control
CAS Latency Time........................5
tRCD .........................................5
tRP'...........................................5
tRAS..........................................15/18

Advanced Timing Control
tRRD...........................................3-4
tWTR..........................................3-6
tWR...........................................4-6
tRFC...........................................42-48
tRTP...........................................3-5
Command Rate (CMD) ....................: 2

Driving Strength Profiles
Driving Strength ............................1066

Channel A
Static tRead Value.........................:7-9
tRD Phase0 Adjustment...................:<<< Leave for all below as well
tRD Phase1 Adjustment...................:Auto
tRD Phase2 Adjustment .................:Auto
tRD Phase3 Adjustment..................:Auto
Trd2rd(Different Rank)....................:Auto
Twr2wr(Different Rank)...................:Auto
Twr2rd(Different Rank)...................:Auto
Trd2wr(Same/Diff Rank)..................:Auto
Dimm1 Clock Skew Control...............:Auto ps
Dimm2 Clock Skew Control...............:Auto ps

Channel B
Static tRead Value.........................:7-9
tRD Phase0 Adjustment...................:<<< Leave for all below as well
tRD Phase1 Adjustment...................:Auto
tRD Phase2 Adjustment .................:Auto
tRD Phase3 Adjustment..................:Auto
Trd2rd(Different Rank)....................:Auto
Twr2wr(Different Rank)...................:Auto
Twr2rd(Different Rank)...................:Auto
Trd2wr(Same/Diff Rank)..................:Auto
Dimm1 Clock Skew Control...............:Auto ps
Dimm2 Clock Skew Control...............:Auto ps

Motherboard Voltage Control
Voltage Type.………... Manual
CPU
CPU Vcore….……….........................:1.425
CPU Termination…..... 1.200V*.......: <<< 1.24-1.34
CPU PLL…………………....1.500V*.......: << 1.50-1.57

CPU Referen.…………....0.755V*.......: << Auto

CPU Reference2………,,0.800V*.......:<<< .67% Of Vtt (Termination above) Auto Will set this correctly

MCH/ICH
MCH Core…………….....1.100V...........: << Auto
MCH Reference….…….0.800V...........; <<< Auto
MCH/DRAM Ref.…......0.900V...........: <<< Auto
ICH I/O……………….....1.550V............: <<< 1.55
ICH Core…………...……1.100V............: <<< 1.14-1.2

DRAM
DRAM Voltage ……....1.800V............: 1.9-2.00
DRAM Termination .…0.900V............: <<< Auto
Channel A Reference 0.900V............: <<< Auto
Channel B Reference 0.900V............: <<< Auto

[johnnyl168]