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Antony
Joined: 18 Jun 2002
Posts: 12754
Location: Sydney, Australia
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 10 May, 2006 10:39 pm FireWire 800 (1394b) Express Card 34 |
[sdp=73374] |
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Are you looking to expand your laptop with FireWire 800 (IEEE 1394b) ports?
The FireWire 800 / 1394b Professional Express Card (34 mm) interface adapter is now available from NitroAV .
This Firewire 800 express card provides two FireWire 800 ports and works under Windows 2000 and later and Mac OS X 10.4.6 (Intel-based).
Users of MacBook Pro 15" can make a benefit of two additional FireWire 800 ports with this Express Card 34. (MacBook Pro 17" has built-in FireWire 800 port.)
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Don_HH2K
Joined: 09 May 2004
Posts: 4745
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| 11 May, 2006 4:43 am |
[sdp=73375] |
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ExpressCard/34 is still an emerging standard, and has yet to be found in the majority of laptops. NitroAV also sells a PCMCIA variant of the ExpressCard model, which also features a DC power input jack and an extra IEEE 1394a / FireWire 400 jack.
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Laptop: Turion 64 X2 @ 2GHz, 2GB DDR2-667, 100GB HD, ATI Radeon X300, 15" LCD, Seven Ultimate RC |
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Antony
Joined: 18 Jun 2002
Posts: 12754
Location: Sydney, Australia
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| 11 May, 2006 5:07 am |
[sdp=73376] |
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According to Wikipedia, besides Apple, Hewlett-Packard, IBM (Lenovo), Dell and ASUS shipped systems with ExpressCard/34.
Also, as ExpressCard FAQ mentioned, ExpressCard is a new standard introduced by PCMCIA, and designed to replace PC Cards (PCMCIA 2.0).
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Don_HH2K
Joined: 09 May 2004
Posts: 4745
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| 11 May, 2006 2:45 pm |
[sdp=73394] |
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The fact that there are manufacturers shipping ExpressCard/34 models doesn't mean that everybody has bought an ExpressCard/34-capable notebook yet.
It doesn't mean that, becuase there's a new standard, that people have to move to that standard rapidly. A 32-bit PCMCIA slot runs at 133MB/sec, while FireWire 800 runs at 80MB/sec. That's enough bandwidth to support a FireWire 800 connection, or even a gigabit Ethernet connection (which is 100MB/sec).
PCI Express has a total bandwidth of 2.5GB/sec. Do we even have any interface, save for graphics boards and other such controllers, that give that kind of throughput?
Given, the future has to come someday, but that doesn't mean that I absolutely need to stop using my old PCMCIA cards (even the 16-bit ones that I still use) and jump to ExpressCard for awhile.
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Laptop: Turion 64 X2 @ 2GHz, 2GB DDR2-667, 100GB HD, ATI Radeon X300, 15" LCD, Seven Ultimate RC |
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Antony
Joined: 18 Jun 2002
Posts: 12754
Location: Sydney, Australia
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| 12 May, 2006 1:18 am |
[sdp=73408] |
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| Don_HH2K wrote: |  It doesn't mean that, becuase there's a new standard, that people have to move to that standard rapidly. A 32-bit PCMCIA slot runs at 133MB/sec, while FireWire 800 runs at 80MB/sec. That's enough bandwidth to support a FireWire 800 connection, or even a gigabit Ethernet connection (which is 100MB/sec). |
I take the "B" stands for "byte" in your MB/sec.
The mentioned "133MB/sec" is only available to CardBus when the data is in 32 bits.
| PCMCIA.org wrote: | CardBus (32 bit burst mode)
* Byte mode: 33 Mbytes/sec
* Word mode: 66 Mbytes/sec
* DWord mode: 132 Mbytes/sec |
The benefits of ExpressCard over PCMCIA cards:
- Size. ExpressCard modules are roughly half the size of PC Card, as well as being lighter (34 or 54 mm x 5 mm x 75 mm for ExpressCard vs. 54 mm x 85.6 mm x 5 mm for CardBus). See side-by-side comparison here.
- Speed. ExpressCard modules use serial (PCI Express and USB 2.0) data interfaces rather than the ISA (16-bit PC Card) or PCI (CardBus) parallel bus interfaces, improving bus speed in data transfer while reducing the number of signals needed in the interface (2.5 Gb/s [PCI Express] or 480 Mb/s [USB 2.0] for the ExpressCard interface vs. 132 MB/s maximum theoretical throughput for the CardBus interface.)
- Cost. Because of its streamlined system and mechanical design, ExpressCard designs are anticipated to have a lower implementation cost. Additionally, existing PCI Express and USB 2.0 silicon implementations can be repackaged into ExpressCard modules.
- Less power. ExpressCard modules require less power than has traditionally been required.
(more at ExpressCard.org)
Where the size and less power are two crucial factors. Particularly for 1-inch thin laptops.
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