Timings on RAM

[falcon23]

OK,I have upped my OC to 3.6 and it is running good..I am at 1:1 on ram,and now I would like to adjust my timings on my ram..It is OCZ with heatsinks..1600 1gig each stick..

 Can one lower RAm timings fairly easily?

According to CPUZ:

 DRAM frequency is 400mhz
FSB:DRAM1:1
CAS#latency 5.o clocks

tRCD 5 clocks
tRP 5 clocks
tRAS 15 clocks
command rate 2t

                         IF anymore info needed,please let me know..
                                Falcon23

[BaldEagl]

Set it to the manufacturer recommended timings and voltage.  My BIOS auto setting set mine to 5-5-5-16 @ 1.85V.  Recommended setting is 4-4-4-12 @ 2.00V.  I set it there without issue.

[Gixer]

Falcon,

Yes and No, what you have already with 1:1 and 5-5-5-15 is perfect obtaining a 1:1 with solid burn testing is key. Lowering timings won't give you a significant performance increase. You should be able to go to 4-4-4-12 or even lower, but then you'll need increased voltage as well. With all my overclocks I aim for 1:1 and leave it at that. Going for tighter timings isn't really worth the possible increase in errors for the performance gain.



<S>...-Gixer

[falcon23]

cool,I will try and find out what my memory wants as far as timings and voltage..

                                                                       Falcon23

[Getback]

How do I check my timings? They should be 4-5-4-11. I know it runs at 400 and has a Cas of 4.

Would I merely up the 400 to say 433?

[Gixer]

Use CPUID to get exact details of RAM then go to manufactures website. Corsair for instance lists all it's RAM specs (past and present) in detail.


<S>...-Gixer

[Gixer]

How do I check my timings? They should be 4-5-4-11. I know it runs at 400 and has a Cas of 4.

Would I merely up the 400 to say 433?

Use CPUID or go into BIOS. Ideally you need to match RAM speed to CPU for a ratio of 1:1. Timings of 4-5-4-11 doesn't sound standard spec.


<S>...-Gixer

[Getback]

Use CPUID or go into BIOS. Ideally you need to match RAM speed to CPU for a ratio of 1:1. Timings of 4-5-4-11 doesn't sound standard spec.


<S>...-Gixer

http://www.newegg.com/Product/Product.aspx?Item=N82E16820211188 Oops forgot I gave the Mushkin ram to my mom. This is my Ram

[BaldEagl]

Would I merely up the 400 to say 433?

No!  That would make your DDR2 800 RAM DDR2 866.   

[Getback]

No!  That would make your DDR2 800 RAM DDR2 866.   

Well err uh, I was thinking DDR not DDR2.

Anyway, How do I oc ram?

[BaldEagl]

Well err uh, I was thinking DDR not DDR2.

Anyway, How do I oc ram?

Well, you would do it just as you proposed.  You'de raise the core clock from 400 to whatever number you wanted (within reason) but would also have to loosen timimgs (from say 4-4-4-12 to 5-5-5-16) and raise voltage for very little if any gain.

Furthermore, if you recall, I urged you to OC you CPU to 3.6 Ghz to sync your clock speeds at 400, which you did.  Now you are proposing to un-sync the RAM, which means that the RAM will be waiting on your CPU for data.

Synced clocks eliminate any bottlenecks from the process.  Un-synced clocks will run as fast as the slowest component, so, unless your willing to OC your CPU higher to match your new higher RAM clock you will gain nothing and likely have stability issues as well.

Good luck.

[Fulmar]

What he said ^^^

[715]

Doesn't the SPD on the RAM chips, which CPU-z reads and displays, tell you what the manufacturer wants for that RAMs timing and voltage?  And shouldn't "Auto" in the BIOS use those values automatically?

[BaldEagl]

And shouldn't "Auto" in the BIOS use those values automatically?

No.  Auto normally sets looser timings and lower voltages to be "safe".

[Fulmar]

And shouldn't "Auto" in the BIOS use those values automatically?

Depends where you are using 'Auto'.  Some motherboards have Auto Vcore and Memory timings etc when using their overclock settings in the BIOS.  There is an Auto SPD settings on most boards as well when running stock RAM settings.  It should pick up the pre-determined memory timings correctly, i.e. 5-5-5-15.  However on my Asus P5N-E SLI is did not auto set my RAM timings to what they were suppose to be.  My bios Auto sets my ram at 4-4-4-16, when it's suppose to be 4-4-4-12, which I set manually.