Overclock.net › Forums › Components › Hard Drives & Storage › JMicron Controller?
New Posts  All Forums:Forum Nav:

JMicron Controller?

post #1 of 7
Thread Starter 
Hey guys! This question has been bothering me for quite some time now. I hope someone can clear this up for me! From my mobo specs, I've got these different storage controllers:

Intel® P55 Express Chipset built-in:
  • 6 xSATA 3.0 Gb/s ports
  • Intel Matrix Storage Technology Support RAID 0,1,5,10
JMicron® JMB363 PATA and SATA controller:
  • 1 xUltraDMA 133/100/66 for up to 2 PATA devices
  • 1 xExternal SATA 3Gb/s port
  • 1 xSATA 3Gb/s port (black)
Marvell® PCIe SATA6Gb/s controller:
  • - 2 x SATA 6.0 Gb/s ports (Gray)

From what I learned so far: Intel is still the best, even for SATA 6GB/s SSDs. Marvell gives better sequential speeds but loses at 4Ks and since HDDs dont benefit from 6GB speeds and SSDs benefit mostly from 4Ks, Marvell is practically useless.

Now, I couldn't find anything useful on JMicron! Google gives practically nothing! So, guys, could you please explain what is this controller for? Does it have any benefits at all? Coz I feel kinda sad that I payed for the mobo and the price included this controller, but it has no use to me
post #2 of 7
It's for IDE drives, and to give more SATA ports onboard. What do you think it was going to be for?
post #3 of 7
Thread Starter 
But I can have IDE drives on Intel and Marvell as well. Why have a separate IDE only controller? I really had no idea what it was for. That's why I asked.
post #4 of 7
All the other controllers on your board are SATA-based - and would require bridge chips to use PATA drives. And they take up more board space and cost more than the JMicron does - so it's not worth it.

And by adding that controller they get to advertise the board as having 9 SATA, 1 eSATA and a dual channel PATA port. If they went with the bridge chips it would cost more but have only 5 SATA, 1 eSATA and a dual channel PATA.
post #5 of 7
Thread Starter 
Ah, I see now. But how is eSATA different from SATA? I got eSATA port in the front of my Antec 902. Should I be using the JMicron port for it? Better speeds? Coz right now I am using Intel one and it works just fine.
post #6 of 7
eSATA is just SATA with slightly tweaked voltages (unimportant really - both setups are interchangeable) and a slightly different connector (which means you need an eSATA cable, other than that unimportant).

If you have issues with noise etc (sub near case, live next to a substation etc) then you may get slightly better performance if you used the rear eSATA port directly, as this will be the only port set up to use the eSATA voltage specs. There will be no real difference unless your eSATA cables are poor and long though, and there will be no performance benefit to switching to the JMB rather than the Intel controller if you just use the internal ports (and as the JMicron is much slower than the Intel you may lose performance also - but for single drives the difference is not significant).
post #7 of 7
Thread Starter 
Alright. Got it now! Thank you very much!
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Hard Drives & Storage
Overclock.net › Forums › Components › Hard Drives & Storage › JMicron Controller?