Pci-x and Pci eXpress....[scratch scratch]

Chinoz · March 19th, 2003

So...just what are these 2 pci's abt?
Use to think they're the same, but turns out that pci-x is pci extended and not express...

Hanamichi · March 19th, 2003

I think PCI-X is supposed to be a faster PCI and PCI Express is something different that's must faster, and it will replace the AGP slot in the future.

**Demigod** · March 19th, 2003

Yup, Han is correct. From the information I've gathered PCI-X is a faster version of PCI while PCI Express is a different technology.

PCI-X is based off the original PCI specs with higher frequencies and improved features. PCI-X 1.0 runs at 66, 100, and 133 Mhz frequencies, allowing up to 1.06 GBps bandwidth (133 Mhz on a 64-bit bus). PCI-X 2.0 specs define PCI-X 266 and PCI-X 533, which can up the bandwidth to 4.3 GBps (533 Mhz on a 64-bit bus). PCI-X is also more fault tolerant and is backwards compatible with older PCI devices. PCI-X 1.0 has been approved and standardized while PCI-X 2.0 is in the works.

PCI Express has been anointed to be the successor to the PCI bus and has much greater bandwidth potential than PCI or PCI-X and is also more flexible. PCI Express is a serial technology (PCI and PCI-X are parallel) with maximum bandwidth capacity per pin and is bi-directional (250 MBps per lane x 32 lanes x 2 = 16 GBps). Its serial design means that PCI Express devices won't have to share the same bandwidth on a shared bus and on a fixed frequency (devices can each use different lanes). It is also fault-tolerant and has some hot-swappable capabilities as well. PCI Express is expected to replace the PCI bus in the upcoming years and will replace the PCI and AGP bus.

Both PCI-X and PCI Express are expected to be used in computers in the future.

March 19th, 2003

I'm doubting these cards will be backwards compatible. I think it'll be another ISA issue. You will upgrade or lose it all :|

Fortunately with my new system I don't really have that many PCI devices anymore...

Raqia · March 19th, 2003

Here's a fantastic article about it:

http://www.extremetech.com/article2/...,522663,00.asp

I hope they don't delay it any further. They claim that boards supporting it should be available in volume by early 2004.

March 19th, 2003	#1 (permalink)
Chinoz ... Join Date: Jan 2003 Location: Desa Park, Key Ell, Malaysia Posts: 2,301	Pci-x and Pci eXpress....[scratch scratch] So...just what are these 2 pci's abt? Use to think they're the same, but turns out that pci-x is pci extended and not express... __________________ System specs P4 2.6c \| Abit AI7 \| Radeon 9800pro \| 1024mb kingston ddr400 \| 120gb seagate sata \| 40mb wd \| And all the minor bits and pieces 3dMark2001SE

March 19th, 2003	#3 (permalink)
Demigod これはバタスです Join Date: Jun 2001 Location: Toronto, Ontario, Canada Posts: 5,811	Yup, Han is correct. From the information I've gathered PCI-X is a faster version of PCI while PCI Express is a different technology. PCI-X is based off the original PCI specs with higher frequencies and improved features. PCI-X 1.0 runs at 66, 100, and 133 Mhz frequencies, allowing up to 1.06 GBps bandwidth (133 Mhz on a 64-bit bus). PCI-X 2.0 specs define PCI-X 266 and PCI-X 533, which can up the bandwidth to 4.3 GBps (533 Mhz on a 64-bit bus). PCI-X is also more fault tolerant and is backwards compatible with older PCI devices. PCI-X 1.0 has been approved and standardized while PCI-X 2.0 is in the works. PCI Express has been anointed to be the successor to the PCI bus and has much greater bandwidth potential than PCI or PCI-X and is also more flexible. PCI Express is a serial technology (PCI and PCI-X are parallel) with maximum bandwidth capacity per pin and is bi-directional (250 MBps per lane x 32 lanes x 2 = 16 GBps). Its serial design means that PCI Express devices won't have to share the same bandwidth on a shared bus and on a fixed frequency (devices can each use different lanes). It is also fault-tolerant and has some hot-swappable capabilities as well. PCI Express is expected to replace the PCI bus in the upcoming years and will replace the PCI and AGP bus. Both PCI-X and PCI Express are expected to be used in computers in the future. __________________ CPU: Intel Core 2 Quad Q9450 @ 2.66 Ghz (Yorkfield) Mobo: Intel DX48BT2 Memory: 2048 MB PC10600 DDR3 Videocard: PNY Geforce 9800 GX2 PCIe w/ 1024 MB GDDR3 Soundcard: On-board SigmaTel High Definition Audio Hard drive: 300 MB Maxtor & 1 TB Hitachi Optical drive: LG GGW-H20L (2x BD-R DL) OS: Microsoft Windows Vista (32-bit)

March 19th, 2003	#5 (permalink)
Raqia Ah! Join Date: Dec 2001 Location: Evanston Il Posts: 545	Here's a fantastic article about it: http://www.extremetech.com/article2/...,522663,00.asp I hope they don't delay it any further. They claim that boards supporting it should be available in volume by early 2004. __________________ Laptop: 1.6@2.13 Dothan 2MB (Pinmod), 2 GB 533mhz DDR2, GeForce 6800 360/730 256MB, 100 GB 5400 RPM, 17" UXGA+

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

March 19th, 2003	#2 (permalink)
Hanamichi Crotally Tazy Join Date: Jun 2001 Location: Malaysia Posts: 4,562	I think PCI-X is supposed to be a faster PCI and PCI Express is something different that's must faster, and it will replace the AGP slot in the future.

March 19th, 2003	#4 (permalink)
ChrisRay Guest Posts: n/a	I'm doubting these cards will be backwards compatible. I think it'll be another ISA issue. You will upgrade or lose it all :\| Fortunately with my new system I don't really have that many PCI devices anymore...