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mikk36
HV Guru
liitunud: 21.02.2004
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22.09.2007 02:05:45
Re: Uus standard: USB 3.0 ning 4,8Gb/s (600MB/s) andmete edastuskiirus aastaks 2008 |
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| BReaK da iCE kirjutas: |
| 8 kirjutas: |
| Heips - keegi ei takista ju kasvõi praegu kohe toota ka eSATA liidesega mälupulki! |
Hkhmm... Ja kust need mälupulgad oma toite saavad siis!? |
jep, sellega on kehva lugu eSATA puhul
| Wikipedia kirjutas: |
| For small form-factor devices (such as external 2.5" (70 mm) disks), a PC-hosted USB or FireWire link supplies sufficient power to operate the device. Where a PC-hosted port is concerned, eSATA connectors cannot supply power, and would therefore be more cumbersome to use. |
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Andrus Luht
itimees.ee
liitunud: 11.06.2002
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tahanteada
Lõuapoolik
liitunud: 04.04.2003
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22.09.2007 09:35:58
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mikk36: Kui insenerid pidutsemise ära lõpetatavad ja tööle hakkavad, siis on suht. nohu see toiteskeem välja mõelda 
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8
HV Guru
liitunud: 27.04.2005
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22.09.2007 13:26:41
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| tahanteada kirjutas: |
| mikk36: Kui insenerid pidutsemise ära lõpetatavad ja tööle hakkavad, siis on suht. nohu see toiteskeem välja mõelda (y) |
Mõnedel uuematel arvutitoiteplokkidel oligi vist olemas ka välispidine toiteots, mis mõeldud just kastist väljaspool oleva seadme jaoks.
Aga loomulikult oleks võinud eSATA standardi enda ka juba eos nii konstrueerida, et saaks seal kasutada koos toitesoontega pistikuid/kaableid (samas mitte kohustuslikult, s.t. ka ilma toiteta pistik/kaabel läheks samasse eSATA pesasse samahästi sisse - toiteklemmid oleks nagu pesa laiendusena).
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reebus
HV kasutaja
liitunud: 22.10.2003
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29.10.2007 11:40:42
Re: Uus standard: USB 3.0 ning 4,8Gb/s (600MB/s) andmete edastuskiirus aastaks 2008 |
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| BReaK da iCE kirjutas: |
| 8 kirjutas: |
| Heips - keegi ei takista ju kasvõi praegu kohe toota ka eSATA liidesega mälupulki! |
Hkhmm... Ja kust need mälupulgad oma toite saavad siis!? |
Säraka saavad loomulikult teise otsa lisakablaga usbist 
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AJ
HV Guru
liitunud: 03.02.2005
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reebus
HV kasutaja
liitunud: 22.10.2003
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19.05.2009 10:59:31
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| Jää hakkab tasapisi liikuma. NEC on esimese USB 3.0 kontra valmis saanud, järgmiseks aastaks on siis esimesi reaalselt töötavaid USB 3.0 standardiga seadmeid turule oodata.
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AJ
HV Guru
liitunud: 03.02.2005
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19.05.2009 12:45:39
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| reebus kirjutas: |
| Jää hakkab tasapisi liikuma. NEC on esimese USB 3.0 kontra valmis saanud, järgmiseks aastaks on siis esimesi reaalselt töötavaid USB 3.0 standardiga seadmeid turule oodata. |
Jutt siis sellest
NEC Rolls-out First USB 3.0 Add-on Cards
http://www.techpowerup.com/94706/NEC_Rolls-out_First_USB_3.0_Add-on_Cards.html
| tsitaat: |
| NEC unveiled the first add-on cards based on its recently announced µPD720200 USB 3.0 host controller. This is the typical route taken by a company to propagate the standard in an environment where motherboard vendors and chipset makers haven't yet embraced it. For the desktop segment, the reference-design PCI-Express x1 add-on card provides two SuperSpeed USB 3.0 ports that are backwards-compatible with USB 2.0, 1.1, and 1.0. NEC also released an add-on card for notebooks, in the ExpressCard-34 form-factor based on the same controller, offering the same two ports. With these reference designs, NEC plans to propagate add-on card vendors to design their own cards based on the NEC µPD720200 controller. Typically, these cards should be priced around the $15~20 mark. A successor to USB 2.0, USB 3.0 offers 10-times the bandwidth (4.8 Gbps), although it will take a while for devices to use all that bandwidth, let alone support the standard. Perhaps this is why the company seems to find PCI-Express x1 sufficient as its system interface. |
_________________
Küsige mida tahate, me vastame mida tahame. |
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reebus
HV kasutaja
liitunud: 22.10.2003
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1dumbpcuser
HV Guru
liitunud: 05.03.2002
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29.08.2010 15:38:38
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Not All USB 3.0 Implementations Are Created Equal
TomsHW
| Conclusion kirjutas: |
You’d think that identical host controllers would provide similar performance, regardless of how they're implemented (or at least that motherboard vendors should achieve similar results by intelligently adding this functionality). However, existing USB 3.0 solutions vary for two possible reasons. There may be differences on the driver side, and performance depends a lot on how the controller is attached to the host system.
Stand-alone cards may be bottlenecked on older PCI Express systems, as well as practically all Intel machines that implement PCI Express 2.0 only on the graphics interfaces. In case you aren't up to speed on the situation there, the company's Lynnfield- and Clarkdale-based desktop processor employ an integrated PCI Express 2.0 controller limited to 16 lanes. The remaining connectivity comes from chipsets like P55 and H57, which run at PCIe 1.1 signaling rates, thereby handicapping performance.
USB 3.0 cards inserted into PCIe 1.1 slots might face throughput limits. However, this isn't always the case. We measured our lowest throughput of 113 MB/s on a Gigabyte P55A-UD6 with an onboard NEC USB 3.0 controller and the fastest throughput on the Asus Crosshair IV Formula using add-on PCIe 2.0 cards from Gigabyte and Western Digital. Combined read and write operations were fastest on stand-alone controllers with sufficient bandwidth, and on the Gigabyte P55A-UD7, which switches PCI Express resources.
In the end, we can’t speak for or against PCI Express 2.0 add-on cards for USB 3.0. They all deliver sufficient performance for today’s devices, such as Super Talent's RAIDDrive. Yet, we strongly recommend operating these in true PCI Express 2.0 slots for maximum performance. If you want a motherboard with an integrated USB 3.0 controller, you should definitely consider product reviews that include USB 3.0 performance evaluation, given that seemingly-similar products, such as Gigabyte's P55A-UD6 and -UD7, deliver markedly different results.
We also found no reason to shy away from a USB 3.0 hard drive and controller bundle, such as WD’s MyBook 3.0. So far, all USB 3.0 products are based on the NEC controller, and none of them are bad. |
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O: Low-profile pci bracket |
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sa ei või postitada uusi teemasid siia foorumisse
sa ei või vastata selle foorumi teemadele
sa ei või muuta oma postitusi selles foorumis
sa ei või kustutada oma postitusi selles foorumis
sa ei või vastata küsitlustele selles foorumis
sa ei saa lisada manuseid selles foorumis
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