Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In article <_-2dnVGs2_mJUSzfRVn-pQ@rogers.com>, "Ken'"
<xyz@Mailinator.com> wrote:
> "Paul" <nospam@needed.com> wrote in message
> news:nospam-1606050049090001@192.168.1.178...
> > In article <HfudnUdBpLlzdC3fRVn-sA@rogers.com>, "Ken'"
> > <xyz@Mailinator.com> wrote:
> >
> >> snip>
> >> > Have you verified the clocks and timings the system is
> >> > using, with a program like CPUZ ? I've had issues where
> >> > timing settings in the BIOS are not actually being used
> >> > to program the hardware. Verify your settings with CPUZ
> >> > (www.cpuid.com) and see if things are set up the way
> >> > you think they should be.
> >> >
> >> > Paul >snip
> >>
> >>
> >> Paul
> >> I have checked with CPU-Z and if I click on the memory tab it says the
> >> timing are 3- 4- 4- 8. ( this is what OCZ web site say they are )
> >> If I click on the SPD tab it says the timings are 3- 5- 5- 10.
> >> I have conversed with a support rep from OCZ forum and he suggested that
> >> I
> >> set the timings to 2.5-3-3-7
> >> Now here is where I have a problem, if I change the bios to SPD disabled,
> >> there is 5 places where I can input the timings, and I only have 4
> >> numbers
> >> to put in.
> >> Which timings goes where?
> >> The timing entries are
> >> cas# to latency
> >> Ras# to precharge
> >> Ras# to cas# delay
> >> precharge delay
> >> burst length
> >>
> >> I presume that the numbers are entered top to bottom that would leave
> >> burst
> >> length. What is entered in it using the above numbers?
> >> Thanks
> >> Ken'
> >
> > Slide 24: 2.5,3,3,7 = Tcas, Trcd, Trp, Tras
> >
http://corsairmicro.com/corsair/products/tech/memory_basics/153707/index.html
> >
> > Asus name Param Info in Micron Datasheet
> >
> > DRAM Cas latency Tcas Column Address Strobe (Read) to data
> > DRAM Ras precharge Trp Precharge command period
> > DRAM Ras to Cas delay Trcd Active to Read or Write
> > DRAM Precharge delay Tras Active to Precharge delay
> >
> > It looks like in Asus order, the middle two params get swapped.
> >
> > Assuming a cache line is 64 bytes, and you are using dual channel
> > memory (16 bytes per transfer), the burst size should be 4.
> >
> > (How I hate the timing param naming convention... I have to look it
> > up every time.)
> >
> > Paul
>
>
>
> Paul
> I tried timings of 2.5 -3 -3 -7 and burst rate of 4 and it didn't boot. I
> had to clear the RTC and rest the bios defaults.
> What went wrong?
> Ken'
The SPD in your RAM says 3-4-4-8. Adjust the settings manually
a step at a time, until CPUZ reads 3-4-4-8. I couldn't figure
out what the hell the BIOS on my P4C800-E was doing, because
it was doing something different with each combo of settings I
tried. It could be that when you set 2.5-3-3-7, it used timings
that bore no relationship to those numbers. When a user selects
"manual", the BIOS should just use the settings it is given,
and not get clever. (Try dropping the FSB clock, so that if the
timings are way off, it will still POST. That may allow you to
investigate the relationship between BIOS setting versus what
you see in Windows. When Windows reads 3-4-4-8, then the RAM
is running at its rated timings, all the way up to the RAM's
max frequency. You will still need to keep an eye on the
timings, as you change the FSB again, because the BIOS might
be more clever than you think.)
While I haven't bothered, it is possible a BIOS upgrade will
do a better job of actually setting the BIOS according to the
info the user enters in the setup screen. Either that, or
try to figure out what kind of broken arithmetic the BIOS
is actually using.
This is one of the reasons for using CPUZ - to make sure that
the BIOS isn't doing something stupid.
There is nothing in the BIOS release history, to suggest they
ever fixed the DDR timing settings problem. I think I'm running
1014.
********************
Must use new Afudos(2.07) to flash BIOS.
Upgrade ASUSLiveupdate to v 5.22.02 or later
[ 1022 ]
Add Mobile CPU Voltage adjust Item.
Add Mobile CPU multiplier adjust Item.
[ V1021 ]
Patch for SATA HDD detection error
Patch Plextor SATA DVD detection error
Support mobile CPU adapter card CT-479.
Support new CPUs.
[ 1019 ]
Fixed boot order error when clear cmos and adjust sequence.
Add Item to control SATA delay time.
[ 1018 ]
Add CPU LockFree function.
Support new CPUs.
[ 1016 ]
Fix Prescott Locked CPU can't run to highest frequency.
Updata Intel RAID BIOS v3.54. Support new CPUs.
Fix the issue that Logitech QuickCam under Win98.
[ 1015 ]
Support new CPUs.
Fix boot devices fail to be disabled when more than one boot device
in the same group.
[ 1014 ]
(Please do not use Ezflash for updating this BIOS.)
Fix extended F8 Menu that can't show all devices,if you used more than
one removables HDD, and cdrom and BEV(Bootstrap Entry Vector) devices.
Revise extended memory size(16K--->64K).
Revise Ultra DMA Mode max limit(ultra DMA mode 6--->5).
Mute beep sound for USB device plug-in/plug-out.
Support new CPUs.
Fix the system hangs after clear CMOS.
Fix LAN function fail under WinNT4.0.
[ 1011 ]
Fix PS/2 keyboard and PS/2 mouse can't wake up the system from
Suspend-to-RAM (S3) and Hibernate(S4). Fix the system can't boot
to Windows 2000 after 3DLabs Wildcat VP760 XGA card driver
(v3.01.0181) is installed. Fix LPT port is disabled after flashing
a BIOS by EZ Flash. Fix the system hangs in POST (POST Code
😀1)
after flashing a BIOS by EZ Flash if a FSB800 CPU is used.
Update Promise RAID boot ROM (1.00.0.37).
Fix the system can't boot from Intel CSA 82547EI PCI LAN card.
[ 1010 ]
Update Intel RAID boot ROM to v3.5.0.2568 to support RAID 1 mode.
Please also use the latest IAA to support this function.
********************
Paul
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