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RPM vs. SATAII

 
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kprrok



Joined: 06 Apr 2004
Location: KC

PostPosted: Sun Sep 23, 2007 3:15 am    Post subject: RPM vs. SATAII Reply with quote

This may be a stupid question, but I can't figure it out.

The facts as I get them...

1.) A WD Raptor spins at 10,000 RPM which allows the drive to read and write data really fing quickly. But, the connection is SATA (1.5GB/s).

2.) A standard Seagate spins at 7,200 RPMs with a 16MB cache, which is a slower spinning speed and this means slower read and write capability. BUT, the connection is SATAII (3.0GB/s).

So which is actually faster?

The faster spinning drive can't transfer the data to the MB and system as quickly b/c the connection speed is slower. But the faster connection has a slower spinning speed.

Which is more important? RPM or connection speed?

Throw into this a RAID which makes the writing faster by splitting it over 2 drives. Does this affect it at all?

KPRROK
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cbclark4



Joined: 20 Aug 2006
Location: Masan

PostPosted: Sun Sep 23, 2007 4:17 am    Post subject: Reply with quote

The long and short. The sata is a the bus speed rating.
The RPM is somewhat a seek time rating.

You want the drive to be the fastest possible seek time.

You also want a faster bus.

I have used this page for a buying guide before.

It's a little out of date but gives you the concept of bus speed vs. seek time.

http://www.computerhope.com/btips/hdd.htm

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

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

http://www.pcguide.com/


Last edited by cbclark4 on Sun Sep 23, 2007 4:18 am; edited 1 time in total
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Tathen



Joined: 10 Sep 2007

PostPosted: Sun Sep 23, 2007 4:18 am    Post subject: Reply with quote

I was JUST coming to this section to ask the exact same question. Hope we get a good answer, as I'm buying a new compy soon. The Raptor is quite a bit more expensive considering it's only 150gig compared to the 500gigers (if I was looking at the same one as you recently).

Logic tells me the raptor with higher RPM must have an edge.

With that said, would the Sata2 500gig 7200rpm drives be fine for a hardcore gamer? Or would life be better with a 10,000rpm drive in there?

~Tathen
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cbclark4



Joined: 20 Aug 2006
Location: Masan

PostPosted: Sun Sep 23, 2007 4:20 am    Post subject: Reply with quote

Another short answer is if your Computer supports SATAII then you should use a SATAII drive.

Always work from the processor out for speed.
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cubanlord



Joined: 08 Jul 2005
Location: In Japan!

PostPosted: Sun Sep 23, 2007 5:39 am    Post subject: Reply with quote

Here's the simplest answer:

for what you guys will be doing, you will not notice a difference. Maybe a second faster if that.
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Demophobe



Joined: 17 May 2004

PostPosted: Sun Sep 23, 2007 5:44 am    Post subject: Reply with quote

Tathen wrote:
I was JUST coming to this section to ask the exact same question. Hope we get a good answer, as I'm buying a new compy soon. The Raptor is quite a bit more expensive considering it's only 150gig compared to the 500gigers (if I was looking at the same one as you recently).

Logic tells me the raptor with higher RPM must have an edge.

With that said, would the Sata2 500gig 7200rpm drives be fine for a hardcore gamer? Or would life be better with a 10,000rpm drive in there?

~Tathen


Well, cbclark4 said that it is seek times vs. transfer rates...a bit vague, but not altogether wrong. Head speeds come into play with seek times and a faster platter rotation speaks nothing of the heads, though at 4.9ms, the Raptor is much more efficient than the common 8~10ms. If you want to know if the Raptor floods a SATA300...factors, factors...basically, no. The Raptor tops out around SATA flows, 1.5GB/s and even seek times will reduce as the drive fills. Raptors are not meant for gamers.

Gaming..., if you have enough RAM (bare min. 2GB), read/write backs to the HDD should be minor and the difference between what little data would be transferred at 10,000 or 7200 RPM would be minimal. HDD rotation speed is near meaningless to games, save initial load times. Programs however...

Life is always better with the fastest equipment, but the 10,000 RPM drives are quite small. Get a 10,000 for your OS/programs and use 7200 SATA300s for the rest of your storage needs. Until 10,000 RPM drives get bigger, they remain a minority use drive.
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