Memory Timing Question

[wkinney]

My memory has cas latency 3, timing 3-3-3, and says so in CPU-Z in the SPD tab:

SPD

however it says different timing in the memory tab:

memory

3-4-4-8,

Is my memory not set correctly? why is it different?

my memory @ newegg:
http://www.newegg.com/Product/Product.asp?Item=N82E16820141423

also please disregard the ugly green, had to do screenshots over remote desktop @ 256 colors...

 

[w00t]

you have to change your memory timings in bios to 2.5 cas latency.so go in your bios looking for somthing like dram configuration put it on manual and set ur cas latency to 2.5 than save to cmos and might be F10 and enter boot up check cpu-z again.

 

[wkinney]

Originally posted by: w00t
you have to change your memory timings in bios to 2.5 cas latency.so go in your bios looking for somthing like dram configuration put it on manual and set ur cas latency to 2.5 than save to cmos and might be F10 and enter boot up check cpu-z again.

but wouldnt that bring the speed down to 166Mhz? wouldnt i want 200Mhz (DDR 400, PC 3200) ??

 

[w00t]

Originally posted by: wkinney

Originally posted by: w00t
you have to change your memory timings in bios to 2.5 cas latency.so go in your bios looking for somthing like dram configuration put it on manual and set ur cas latency to 2.5 than save to cmos and might be F10 and enter boot up check cpu-z again.

but wouldnt that bring the speed down to 166Mhz? wouldnt i want 200Mhz (DDR 400, PC 3200) ??

wait i just noticed your ram says it runs at 3 cas latency why did you get kingston corsair value or ocz vs.

 

[Bozo Galora]

SPD is the serial presence detect chip on the ram that auto sets the module to guaranteed to run specs.
SPD info never changes, its burned into chip.
There should be an SPD or auto detect option in bios that will check this chip to set timings.
It can be over ridden by setting timings MANUALLY in BIOS.
You should be able to set 3338 timings in bios since thats normal, assuming stock FSB peed of 200MHz
If you are overclocking - like say 240MHz, then you might not even get 3338, but then you can boost the DIMM voltage to at least 2.8V safely and keep running memtest 86+ from floppy to see if it "goes".

If you are using an NF3 or NF4 board (not specified by you) then about 20 other options may influence the timings

Quote:
http://www.ministryofoverclocking.net/f...?t=39&postdays=0&postorder=asc&start=0

great NF3 UT O/C thread

You see TCCD memory does not require high Vdimm, a acceptable range is 2.5 ~ 2.9v at 2.5-3-3-7 1T timings.

The settings

If those settings below means nothing to you, I recommend you to read this: http://www.ocforums.com/showthread.php?t=329627

Vddr: 2.7v
TCL: 2.5
Trcd: 03
Tras: 07
Trp: 03
Trc: 07
TrFc: 14
Trrd: 02
Twr: 02
Twrt: 01
Trwt: 02
Tref: 4078
Twcl: 01

Skew: Increase 128
Drive Strength: 1
Max. async: 7ns
Preamble: 5ns
R/w Bypass: 16x
Bypass: 7x
32B granuarity: Disable

Every memory acts different than others, so you have to tweak them well. This is only a guideline for you.
The settings above are the fastest and most stable setting for my Gskill TCCD memory. I think these are the fastest settings, if people find new settings share them plz!
If those settings are not stable with your memory, you can change some setting, still 2.5-3-3-7 1T. Running 2T is not great and its something you do not want to run.

etc etc.

 

[wkinney]

thx Bozo Galora