practical difference b/w udma33 vs udma100 mb

[omeryounos]

currently i ve se440bx2 mb w 512 sdram, 40gb hd ,1ghz celeron ,will it make any diff if i move to 815epea2 mb which i think supports udma100 & agp 4x.i ve a gf2 mx400.

 

[juicebykurt]

The jump from ata33 to ata66 was very noticible. that's 2x as fast. ata66 to ata100 wasnt as noticible but still good. so i imagine going from ata33 to ata100 will kick your ass. regardless, why dont you just get an ata133 mobo now that they are out? thats 4x faster! of course you have to have a ata133 hdd as well. btw, why did you include your other components if you were just referring to the diff in ata speeds?

 

[Crashman]

LMAO! NO, the BX chipset is far superior in performance to the i815. In fact even gaming benchmarks are higher! If you want ATA100 get a PCI IDE card.

What's the frequency, Kenneth?

 

[CMRvet]

Please correct me if wrong…
Not fully agree. 33 and 66 MB/s is the <b>MAX</b> data transfer rate, which is far different from the average data transfer rate.
If ATA 66 would give 2x faster average data transfer rate 1 disk ATA 66 would be as fast as 2 disks ATA 33 at RAID 0 and of course that’s not true.

Only the cache of a hard disk is able to transfer at 33, 66, 100 or 133 MB/s but remember that cache normally is 2 MB (there is only 1 disk with 8 MB in my knowledge) so for data transfers bigger than the cache the data transfer rate would be limited by the reading speed.

 

[juicebykurt]

I'm sure you're right. I don't have a clue about the specifics like that. I was just trying to give him a general idea to help decide on what to get.

 

[camieabz]

I have a BX mobo and an i815EP mobo. Here's the big downfall to the i815EP.

AGP aperture maximum = 64MB. Not good.

Maximum memory = 512MB. Disasterous.

If you could call it a weakness, the BX is limited either to 100MHz or you run it at 133MHz and your AGP bus (66MHz) runs at 89MHz. Most modern cards handle this I'm told and my one has for the last 10 months. In fact, I've run the FSB to 145MHz which is 97MHz on the AGP bus.

One other plus for the i815EP - you can run FC-PGA2 chips. Unless you're hell bent on getting one of the new PIII CPU's, I'd stick with the BX option. Far more stable and fast. Coppermine CPU's go up to....1000EB for sure, 1133? Crash?

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