Is Ultra 133 PCI card as fast as Motherboard IDE?

[chas0039]

Pretty straight question; is an Ultra 133 PCI card as fast as the IDE connections on the motherboard? The MB is an Intel 865PERL with IDE at 150 and a system bus of 800mz. I have tried an Ultra 66 PCI card and I know it is not as fast with a ROM drive which is only DMA 2 so I am hopeing that the problem is the controller not the bus limit.

Much thanks.

[budz]

isn't IDE 150 a SATA IDE? from what i've read the 133 isn't that much slower than 150. it's barely noticeable from what others have told me.

[glockjs]

if u have a tx2 ultra 133 i have the same card. are the speeds the same? no, mobo is faster...but is it that much faster? no. if that answers ur question im not quite sure what you are asking

[chas0039]

if u have a tx2 ultra 133 i have the same card. are the speeds the same? no, mobo is faster...but is it that much faster? no. if that answers ur question im not quite sure what you are asking

That is exactly what I needed. Thanks

budz, you're right, my opticals on IDE are probably at 100. But they still seem slower on a PCI card and it appears as though going to a 133 card won't help.

[studtrooper]

Heh, even though there are raitings for max speeds (like ATA-100 = 100MBps, ATA-150 = 150MBps, etc.), max speeds from even the fastest consumer HDD available can't even saturate a ATA-66 (technically Ultra-DMA/66 or ATA-5) bus. If your HDDs seem slower using a ATA PCI card, you might be saturating the PCI bus's shared 133MBps limit with multiple drives. Generally, using the ATA connections on your mobo is the better bet.

http://en.wikipedia.org/wiki/Advanced_Technology_Attachment

[redwudz]

AFAIK, all optical drives are 33 or 66Mhz bus speed, a faster bus won't help. I went to a Promise TX2 just so I could use my optical drives on another IDE bus and leave my HDs to the MB IDE bus. If you have a PCI 133 controller, sure, it's slower than the MB bus, but not by enough you would notice.

[studtrooper]

Ah crap, I thought the thread was about HDDs and not ROMs. My bad. Anyway, redwuz is right. The max you'll see out of the fastest DVD drive available is barely reaching 16x (which doesn't even touch the Ultra-DMA/33 barrier). Maybe it is your card.

[rallynavvie]

Which is interesting considering there are SATA optical drives. Brilliant marketing move?

[chas0039]

In my case I have very clear evidence that the Ultra 66 controller is slowing down the through-put of data significantly. If I rip a DVD and the drive is on the controller I get a max of 10X. With the same drive on the MB I get 14X. When I connect a hard drive to the controller and copy files it takes 30% longer than when the drive is on the MB. In all cases there is nothing else on the cable. I would have agreed with everything you say; I should not be able to max out the through-put. Evidence seems to prove me wrong.