CAS2 vs CAS3 ram ???

[heng1028]

could anyone tell me about the differences for the CAS2 and CAS3 ram??

 

[Imported]

CAS2 is a bit faster than CAS3. If you could afford it, go for it. You won't see a big difference in performance between the two.

 

[OuranosEXX]

cas 2 is fasterbut also more difficult to find, most ventor sell cas3, if u want to overclock then save teh extre money for the cas2 and go for HSDRAM 150Mhz from Crusial...

 

[heng1028]

how do you check if you are running at CAS2 or CAS3 when you set your bios to CAS2

 

[paulip88]

If you set your BIOS to CAS2 and it still runs, that means that it runs at CAS2. If you set it to CAS2 and it is unstable, or does not run at all, then it doesn't operate at CAS2.

 

[heng1028]

how about the 2,2,2 thing??
is it faster at 2,2,2 or something else??

which is the best setting??? 2,2,2??

 

[GaryTcs]

2,2,2 is a term to define overall performance of the ram.

1. Ram latency. The time elapsed between request for data and when data actually becomes available to the system bus.

2. Ras precharge. How long the bus is idle after issuing a precharge command.

3. Ras to Cas delay. The time between active command, and actual read/write command.


In all cases the lower the number the better.

 

[heng1028]

is there any case that CAS3 is better than CAS2??

 

[JayPatel]

which way does the benefits lean? games or apps?

 

[garkman]

CAS 2 is always better, and unlike some posts here, it's not hard to find. I always reccommend crucial-just pay the extra $10 and get CAS 2. In mosts tests & such a nice CAS 2 DIMM @ 143 (what most crucial CAS2 dimms go to) will beat a CAS 3 @ 150 any day.

 

[heng1028]

i had just set my generic ram to 2,2,2. and i did a sisoft memory, it has shown that 2,2,2 has a huge improve.

is that good for the ram rated CAS3 to run at CAS2??

 

[garkman]

Told ya-CAS2 is a HUGE performance gain over CAS3--if the systems runs, with STABILITY @ cas 2 then leave it...do some testing with a free mem tester @ SimmTester (works for DIMMS too )also "burn" it in @ CAS 2 by running someting like SETI @ Home for 48 hours.

 

[Navi]

1. CAS2 is much better than CAS3 by a factor of 30% raw performance or about 15-20% using a chipset. Anybody who says otherwise needs to at least graduate highschool first, get a BS in EE, Physics, & Math then come talk to me.

2. CAS2 memory is NOT!!!! hard to find. www.muskin.com and www.crucial.com I list off the top of my head without using a dictionary to spell it. And it is affordable. I lived in the days where memory when memory was $200/meg.

3. CAS3 to CAS2 memory will improve ALL systems that are secondary memory based which is pretty much everything that doesn't reside in locked level 1 or level 2 cache...well is pretty much almost everything you install

4. You don't have to buy the best CAS2 memory...but good CAS2 or even CAS3 is a must if you want your system to run well all the time or are even "THINKING" of overclocking.

Have a good day...I'm going to bed....

-Navi

 

[mechBgon]

Here are some gaming benchmarks: http://firingsquad.gamers.com/guides/memoryperformance/default.asp Based on this, the CAS2 setting doesn't seem to give a lot extra in the benchmarks, but the CAS2 RAM is still probably worth paying a little more if you are planning to overclock.

SETI is an example of a program that will reward you for buying the CAS2.

Hope that is a help... : )

 

[BadThad]

If your CAS3 ram runs stable at CAS2, then do it. You cannot hurt it. The ram does NOT have to be rated CAS2 to run at CAS2. I have 512MB of generic PC133 CAS3 ram (by SPD)and it runs perfectly at 2-2-2 @ 124 fsb.

 

[garkman]

Screw u BadThad, do you know what a burn-in is? It's running everything for a long period of time at heavy load to make sure it works properly. So whenever you make a major change to your system you should burn it in, aka TEST it to make sure all is well...good job restating what i said earlier BTW.

 

[paulip88]

badthad,

Anything can run CAS2 if you slow it down enough. The point is to make sure that you are getting CAS2 PC133 so you can run it CAS2 at 133 like most people would want to.

 

[wj]

I running two stick of PC133 cas3 at cas2 in my computer and it works well. But I'm running 100MHz FSB. Now it might not run at cas2 at a 133MHz FSB. If it will run at cas2 with no problems run it.



wj