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Memory for Duron o/cing?

F

fs5

Lifer
I ordered a KT7-RAID and an unlocked Duron. I can overclock using the multiplier or the bus speed correct? So what what kind of memory should I buy? I don't really care about CAS2 because from previous threads I read it only give 15% (max?) increase in performance. I'm looking for maximum reliability at min. cost.

Corsair has a value select line, 128 megs PC133 CAS3 for $70 bucks, but I can get PC133 for as low as $45. Since I'm going to get 2 sticks that's as low as $90 instead of $140. Is the Corsair memory worth the extra $60? Are there other brands I could use? Micron? Kingston?
 
I've heard Mushkin and Crucial are good for o/cing. might be a bit more pricey. I'd like to see some additional responses to this post since I just bought a KT7-Raid and T-bird 900
 
CAS2 only gives about 5% mroe performance at max. WIth that being said, I think that the best deal would be to get PC100 CAS2 memory, as with all KT133-based boards the FSB never goes above 110MHz.
 
KT133 motherboards have a setting to run memory asynchronously (unlike AMD 750) - your memory can run at 133, and FSB at 100 (200 DDR) unoverclocked. At this speed, memory is FSB + PCI bus. As you overclock the FSB, you also speed up the PCI bus a little (Im not positive on this). In any case, probably the best FSB speed you can hope for is around 108-110, which would put the memory at around 145MHz (estimate). You would need PC133 CAS2 to run this at CAS3 145 MHz, and higher quality (Mushkin/Crucial) to push it to 145 MHz CAS2.

Another note, 5% increase is a lot, on a 1000 MHz is 50 MHz. May not be noticeable, but if a few 5%'s add up (100 vs. 133 MHz memory, T-Bird vs. Classic Athlon, etc) it will make your computer a lot faster
 
I bought the muskin pc 133 222 revision 1.5 ram. Right now you can get 128mb for only $89. It was $79 a few days ago. It works great! It is athlon tested too!
 
Son of a, I just ordered 2 128 megs mushkin pc133 222 cas2 for $96 a piece + $16 overnight. I thought I was getting a good deal too! Ah well...
 
fivespeed5,

Your getting quality memory at a fair price. I think you will be happy and that memory should overclock well should you choose to overclock it.


ModemMix
 
You really can't OC memory with KT133 boards... you can OC some good PC100 RAM to 133 but thats about it. I can't get past 104 FSB on my KT7 and Duron 700@988.
 
Subversal, you dont seem to understand like a few others above.

In the bios you can set the memory to hostclk+pciclk. That makes the memory run at 133 mhz. Then as you up your bus speed your memory speeds up as well. So if you can get your fsb to 110 mhz, 133+10 = 143. That means your memory is now running at 143 mhz. Only good quality Pc133 can go that high at cas2.

The best way to overclock on KT133 + Tbird/Duron is to use a combination of overclocking with the multiplier and the bus.

For example 100fsb X 10multiplier = 1ghz, but memory is only at 100 or 133.

If you were to set it to 106fsb X 9.5 mult = 1ghz, and memory is now running at 139mhz.

It is not a huge difference in performance, but as someone pointed out above, every little bit helps.
 
No I understand perfectly. Like I said you can't really OC the memory a lot... The most this KT7 can do is 104FSB for me (9.5x104=988) so its 137Mhz for my RAM. You can't have RAM at say at 150Mhz... the KT133 chipset just cant sustain the high FSB required for that OC. Most people can't get past 106FSB any KT133 boards. Also I was just saying if you have some good PC100 RAM you can set it at 133 and see if it works... I have some Crucial PC100 128MB Dimms and got 134 at CAS3. But my Mushkin PC133 does the 137 at CAS2 with no probs...
 
My RAM runs perfectly fine and stable at 144MHz CAS2 Turbo on my KT7.

BTW, If I set my multiplier down lower than I have it now, I could run very stable at a 115 FSB also.

EDIT: Here is the Sandra Memory Benchmark with the RAM running at 150MHz CAS2 Turbo, FSB at 115.
 
Uhh the Abit KT7 seems to be one of the few boards that can generally make it past 110mhz fsb. My kt7 does 115fsb stable and that along with 38mhz pci bus that gives me 153mhz memory speed.
 
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