• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

ram ratings

W

wayne

2[H]4U
Joined
Aug 4, 2003
Messages
2,726
can sumone please explain to me wut the ram ratings are?..its the ones thats like 2-2-2-6...or sumthing like that

can sumone explain or post a link?

thanks
 
You mean something like this?

CAS Latency Time = 2
Active To Precharge Delay = 6
DRAM RAS# To CAS# Delay = 2
DRAM RAS# Precharge = 2
 
I will attempt to summerize the complex meanings of what memory settings do. While it's a lot more difficult to fully understand, I think this will help clear things up a bit. If I made any errors here, someone please correct me.
Basically, there are 3 things these settings control.
1) The delay time for a memory block to gain control of the system bus in order to send it's info to the CPU.
2) The amount of information the RAM will try to "predict" that the CPU will use next and
3) How many different memory addresses the CPU can access at any given time.
Cas Latency is the single most performance influencing setting. It is basically just a "delay time" in clock cycles that the memory must wait before regaining control of the system bus. A lower delay = faster memory performance.
RAS and CAS to RAS are basically methods of bursting which is, in a nutshell, predicting what chunks of info the CPU will want next and sending them along with the chunks actually requested by the CPU. This saves time because it frees up the CPU from having to "request" each data chunk from the memory as many of the needed chunks will be sent based on the RAM's "prediction".
Interleaving is when the CPU can access numerous blocks simultaneously. The advantage here is that the CPU doesn't have to wait for the CAS delay every time it access a block of memory, instead, it can work with other memory blocks while it's waiting. In a system BIOS, this will typically be called Bank Interleave and will have settings ranging from off (1) to 2 way and 4 way. 4 way is the fastest as it will allow the CPU to access 4 times the amount of memory blocks at a given time.
This article should help explain a lot and goes into much more detail.
http://www.kingston.com/tools/umg/umg03.asp
 
Question...

CAS Latency Time - Higher is better or lower is better?
Active To Precharge Delay - Higher is better or lower is better?
DRAM RAS# To CAS# Delay - Higher is better or lower is better?
DRAM RAS# Precharge - Higher is better or lower is better?
 
As far as ram timings, lower is generally better. There are a few enigmas however. The Active To Precharge Delay on Nforce2 boards yeilds better results around 11. Also it has been stated that the Active To Precharge Delay needs to be no less than the sum of the other three. Hope that helps.

e_t
 
for P4 systems, u want 2's on everything
on NForce2 u want 2's on everything except for CAS latency where u want 11. dont ask me why 11, it just works better
 
Well, it sucked having to read all that but it answered all my questions and i think i'll be able to sucessfully tweak my memory setings... :D
thanks again
 
You must log in or register to reply here.
Back
Top