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Correct me if I'm wrong but SATA has a higher data transfer right?<br />
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The cables are also a lot tidier <img src="/images/smilies/wink.gif" border="0" alt="" title="Wink" class="inlineimg" />
 

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I might have tacos tonite
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the SATA interface is much faster then IDE, but a 5400 rpm SATA drive is still going to be slow
 

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SATA has a higher transfer rate. Plus, it much tidier than IDE. After using SATA I'll never look back.
 

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sata has a higher transfer rate but the hdd can take advantage of it due to the fact the disc can not sustain such speeds the only real reason to go to sata now is to get tidier cables but once blu-ray and HD-dvd writers become more available then we will see a need for the higher b/w
 

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Performance-wise, there's not that much difference. Neither IDE or SATA drives can ever use the whole supposed bandwidth of it's given interface anyway, not even close. <br />
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As for rpm's, yes it makes a difference in the the access and seek times of the drive etc, and so your overall system performance. I noticed a huge leap in performance when I went to my 10k rpm raptor drives. Mostly due to the higher rotational speeds, the seek/access time is alot faster than a standard 7200 drive. For some things the difference won't be noticed. For others, very noticed, windows loads alot faster, game levels load faster. Any task that is hdd dependant just zips right along <img src="/images/smilies/thumb.gif" border="0" alt="" title="Thumb" class="inlineimg" /> . <br />
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Couple of things to keep in mind in EIDE vs SATA:<br />
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Many newer mobo's are starting to come with only one EIDE port, soon maybe none? Even many DVD/CD drives are starting to come sata. I just bought a new DVDROM drive and it's sata. EIDE is starting to die. Soon it will become controller card only/old legacy hardware. You'll still see mobo's with at least one EIDE port for awhile I'm sure, but for how long I don't know. So already it's to the point that you can only have <b>two</b> EIDE devices attached, unless you wanna buy a controller card. <br />
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Also, sata drives can have higher amounts of cache than newer EIDE drives. Someone correct me if I'm wrong, but I don't think I've seen any EIDE drives with more than 8mb cache. Many sata drives have 16mb now. <br />
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Seems like the pace of phasing out EIDE is starting to accelerate. I question whether buying a EIDE drive is a good move anymore. Unless someone doesn't have any sata ports, and/or they don't want to upgrade, I would always recommend sata at this point.
 

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Depends on the drive, a lot of the sata 2 drives seem to have enhanced features like ncq, perpendicular storage etc. which make the drive much quicker. I myself just bought the seagate 320gb 7200.10 drive and its pretty quick, some benches putting it close to the same performance as the raptor.
 
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