question on RAM tweaking
Posted 22 January 2008 - 06:36 PM
Posted 22 January 2008 - 07:14 PM
The timings they are referring to are the CAS/RAS latencies. More specifically, the 4 timings refer to (in this order):
CAS latency, RAS to CAS latency, RAS precharge & Act to precharge delay. Without going into massive detail, basically the lower these values are, the better.
The main however is to try and match your current ram timings with any additional ram that you purchase for that system.
Also beware that these latencies often change depending on speed (FSB) that the ram is being run at.
Re. changing the voltage. This is normally only done when overclocking the ram but is not something I would normally recommend.
Posted 22 January 2008 - 09:11 PM
and lastly, could i change them to get better performance without sacrificing the memory?
Posted 22 January 2008 - 09:18 PM
As for tweaking these, you can safely set them to the timings that they are rated for (should say on memory packaging or Newegg site). You are also going to want to use the recommended voltage if you are using the rated timings (also should say on packaging or Newegg site). Going any lower than the rated timings can cause instability issues which you don't want to have to deal with, so I wouldn't recommend it unless you are an experienced overclocker.
Posted 23 January 2008 - 01:15 PM
Look in the Motherboard -> SPD section to see the memory timings.
Posted 23 January 2008 - 05:59 PM
by the way, is it a noticeable performance increase when you change the timings?
Posted 24 January 2008 - 02:48 PM
Posted 24 January 2008 - 05:24 PM
Posted 24 January 2008 - 05:28 PM
To be honest, I'd leave the timings alone if I were you. Any performance increase will be negligible and it's likely to make the system unstable.
I'm referring to overclocking the timings here - obviously setting them to their rated speed, as stettybet0 suggested is fine
Posted 24 January 2008 - 05:32 PM
Posted 24 January 2008 - 05:54 PM
Posted 24 January 2008 - 06:05 PM
The ultra's sticks' timings were as follows: 3-4-4-8
so with these, do i just go into the BIOS and change it with no problems, and hopefully a significant performance increase?
According to your example, should i set the timings to 3-4-4-8?
to add on to that: i found out that the Ultra stick has a voltage of 2.6v, and the Corsair is at 2.5. so would it be safe to change?
Edited by hoopsman, 24 January 2008 - 06:58 PM.
Posted 24 January 2008 - 09:03 PM
Posted 24 January 2008 - 10:58 PM
RES# to CAS# delay (TRCT) 4T
Row precharge time(TRP) 2T
Row to row delay 2T
so it was at 2-2-4-8, is that correct?
so didnt change anything, cause the settings were lower, and you said not to change if the settings were lower than 3-4-4-8
Posted 25 January 2008 - 08:57 AM
tRCD (RAS to CAS Delay)
tRP (RAS Precharge)
Could you please clarify that these were the timings that you were looking at?
If this is so, and the timings are set lower than both of your memory sticks' rated timings, I would suggest making sure that you were looking at the right sticks on the manufacturers' website.
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