Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
Thank you Bob.
I have a dvd-ROM on Primary Master and a LiteON CD-RW on Secondary
Master. Is it true that with the ICH5R you loose the Secondary onboard
IDE Port? That would make my CD-RW go away.
Bob Millers <rwg@festo.com> wrote in news:c75936$ig8ul$1@ID-
202456.news.uni-berlin.de:
> mpsan wrote:
>
>> I keep seeing this question asked, but have not seen data from
persons
>> who have tried both. I have 2 SATA Maxtor 80GB drives on the Promise
>> controller running RAID 0. MoBo BIOS is 1014. They run fine, but
>> people tell me to try the ICH5R and IAA as it is not on the PCI bus
>> and will run better.
>>
>> My question is...has anyone confirmed this? Most say to use ICH5R as
>> it has to be better but have not tried the Promise. I guess I have
the
>> problem the other way around...I am on Promise and wonder about the
>> ICH5R.
>
> I am using the ICH5R (two WD Raptors as Raid0), and I am quite happy
> with it. No, I have not tried the Promise
>
> Simply have a look at the numbers:
>
> Your SATA Maxtor drives have, depending on the exact type, a max
> transfer rate of about 55-60 MB/s. Take that x2 for Raid0, and you end
> up at about 110-120 MB/s theoretical maximum transfer rate under
optimum
> conditions.
>
> The PCI bus is limited to 133MB/s. It is used by all the other
> components you have there - e.g. sound card, maybe you have a video
> editing card there, maybe you're using some other network card than
the
> onboard CSA controller (e.g. wireless LAN), etc. etc.
>
> If you do not have ANY extra PCI card in use and if you use the
onboard
> LAN, the Promise controller is OK, because the PCI bandwidth is no
> bottleneck for it. But IF you use other PCI cards, you're limiting the
> controller transfer rate to whatever is left after you subtract what
all
> the other cards use up from the 133MB/s limit.
>
> One other things to remember is that I have heard (i.e. I have not
> experimented around myself) that the Intel controller has a lower CPU
> usage than the Promise one.
>
> To sum up: You probably won't notice much of a difference unless you
> have one or more bandwidth hungry PCI cards in your system. If you
> haven't, leave everything as it is - but if you ever reinstall your
> system, try the Intel controller.