tRD(performance Level) Calculator ver1 DDR2 ONLY Intel Chipsets

[Tony]

For those wondering how to set tRD or "performance level" here is a simple spread sheet that allows you to enter the more typical values you are likely to use.

(DDR2 at this time, DDR3 version will come soon)



To start while the calculator is fine tuned I have decided to limit this first release to DDR2, this means working CAS latencies of 3 4 5 and tRD 5 6 7 8 which is where most end users will be looking to set their systems.



FSB straps: if you have 320FSB set you are in strap 1, if you have 430FSB set you are in strap 2, 380FSB would be 1.25 etc.

Memory dividers: if your board quotes 6:5 or 4:3 just remove the : and replace it with / so 6/5 would be 1.2 etc

Answer True means the system should boot OK
Answer False means the system may not boot OK

Remember you have to complete both equations, tRD works by comparing the answer of both with the answer to equation 1 having to be larger than the answer to equation 2 for the tRD setting to allow a boot.

TRD = Read delay or performance level
TCL = CAS latency


Here is the first beta of the calculator
Give it a try and post how it works for you. I am not an Excel specialist but this should give you are working calculator which should explain what will and will not work.

[Tony]

Don't be afraid to post questions, I can not promise to have all the answers but i will try to help.

Also post your results whether it helped you or not...