which is ram config is faster?

[vital]

pc133@cas3 or pc100@cas2?

 

[andrey]

pc100 @ cas2

 

[optoman]

I thought 133@cas3 would be faster? Does anyone have any hard proof of which is faster?

 

[medic]

pc133@cas3 or pc100@cas2?

Depends...

PC133@CAS3 running at 133MHz. is faster than PC100@CAS2 running at 100MHz.

However, if the PC133@CAS3 is running at 133MHz. AND the PC100@CAS2 is running at 133MHz. (most likely only at CAS3) then they would be the same.

 

[Quickfingerz]

cas2 is about %17 faster than cas3 in terms of memory bandwith

 

[thermite88]

<< I thought 133@cas3 would be faster? Does anyone have any hard proof of which is faster? >>

You are right. The difference is small but measurable. Using SANDRA 2000 memory benchmark:

100fsb/cas2: 279/345
133fsb/cas3: 318/410

You need a VIA Apollo 133A type motherboard to run memory at 133 FSB when the CPU uses 100 FSB. It makes the VIA a better solution to overclock a Celeron2 than the BX based MB.

Windows 2000 Professional
Celeron2 533 @ 800, 1.75V, Golden Orb
P3V4X (BIOS 1006 Beta 1), 100 FSB @ 3/4 CPU/memory bus
256MB Infineon, PC133, 2-2-2, 7.5 ns (running PC100/2-2-2 or PC133/3-2-2)
Adaptec 26160 SCSI adapter (BIOS 257.2),
WD Enterprice 10K 18.3MB LVD/Ultar160
Plextor 412 CDR
Plextor 32x caddy CD drive
HP1533A DDS2 4mm tape
Iomega Insider SCSI zip drive.
Tekram DC-315U SCSI Ultra2 card, (no BIOS, for external SCSI only)
Microtek 600V scanner
Toshiba 3401 external CDROM drive
Matrox G400
Linksys Etherfast 10/100 WOL LAN card
Eqsonics AudioPCI
3Com Robotics V.90 hardware modem (PCI).

 

[LXi]

Defnitely PC133 CAS3, just read this.

 

[|TOAST|]

I think that any time you can run that kind of difference in MHz while sacrificing the CAS clock cycle of the RAM you should... My PC133 2-2-2 does not benchmark all that high in Q3A fps (which is fairly RAM intensive) as opposed to running it at 150MHz 3-2-2. Of course one can attribute this to a higher CPU MHz and a higher AGP MHz in my BX setup, but the difference is vast and I find it hard to believe you wouldn't want to run 133 CAS3 over 100CAS2 since it will probably alter some of your system peripherals (ie CPU) to run faster across the board. On a side note, when I run PC133 3-2-2 then I do not notice a difference in fps in Q3A. Just my useless $0.02.