PCI-X, PCIx, PCX, PCI-E, PCIe

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max_e_mum

The use of these these acronyms is often wrong.

My motherboard (8131 AMD chipset) has standard PCI and PCI-X slots

PCI-X is backwards compatable with PCI and the 133MHZ slot has about
1GB bandwidth.

In my search for capture / video cards to fill these slots I
continually find people calling PCI-Express (PCI-E or PCIe) a PCI-X
because express has an "x" in it (maybe). This is highly frustrating
and requires the reading of the "specs" page to find out exactly what
its true interface is.

Another darker thought of mine as to why PCI-E is often called PCI-X,
is to kill the competition.

What do you understand the following acronyms to mean?

PCI-X,
PCIx,
PCX,
PCI-E,
PCIe
 
What do you understand the following acronyms to mean?

PCI-X,
PCIx,
PCX,
Click to expand...
PCI Express, which is wrong. This should actually be referred to as PCI
Extended. Typically found on workstation and server class motherboards,
virtually never on "home PC" boards
PCI-E,
PCIe
Click to expand...
Here's where the problem comes in. This is also referred to as PCI
Express. Which, in this case would be correct. This is the new
interface to replace PCI on pretty much every MB, including
server/workstation class boards.


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There's no "competition" to kill. Both PCI-X and PCIe are Intel-driven
standards. A PCIe x1 or x4 slot exceeds PCI-X in transfer rate, but costs
less to implement due to the fewer motherboard traces required.
 
On 16 Sep 2006 21:20:59 -0700
The use of these these acronyms is often wrong.
Click to expand...

Oh yea. It was quite a challenge to find an actual PCI
express video card because the online listings are so
sloppy in their descriptions.

I wish they had named it the McGuffin standard instead
of giving it almost the same name as a previous standard.

No doubt they'll name the next new bus PCI-VME just to make
sure everyone is confused :-).
 
My bet's on X-PCIe. ("X" for "external", of course.)

The way video card power consumption is going, cards will benefit from an
external enclosure with direct-vent cooling and dedicated power. nVidia is
already doing it with the Quadroplex.

Now imagine Radeon X2900XTX in X-PCIe form factor. :-)
 
What brand motherboard?
The use of these these acronyms is often wrong.

My motherboard (8131 AMD chipset) has standard PCI and PCI-X slots

PCI-X is backwards compatable with PCI and the 133MHZ slot has about
1GB bandwidth.

In my search for capture / video cards to fill these slots I
continually find people calling PCI-Express (PCI-E or PCIe) a PCI-X
because express has an "x" in it (maybe). This is highly frustrating
and requires the reading of the "specs" page to find out exactly what
its true interface is.

Another darker thought of mine as to why PCI-E is often called PCI-X,
is to kill the competition.

What do you understand the following acronyms to mean?

PCI-X,
PCIx,
PCX,
PCI-E,
PCIe



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MSI, K8D master F
tis their early model - a server style board.
it was relatively cheap - second hand
I just wanted dual opterons - it came with a pair of 248's and 2GB
PC2700, board is capable of NUMA
1 x PCI 32 bus 2 slots
2 x PCI-X 100 buses - 3 slots

and no PCI-E

but making it into a workstation aint too hard,
All I need now it to find some way of getting VisionTek cards in(to)
Australia
 
First, this would involve some sort of cabling right? Wouldn't cable runs of
the lengths involved for an external video card unit cause undesirable
electrical characteristics (large capacitive loads?)? Maybe the high
frequencies involved would minimize capactive effects but then inductive
effects could be significant?
 
The use of these these acronyms is often wrong.

My motherboard (8131 AMD chipset) has standard PCI and PCI-X slots

PCI-X is backwards compatable with PCI and the 133MHZ slot has about
1GB bandwidth.

In my search for capture / video cards to fill these slots I
continually find people calling PCI-Express (PCI-E or PCIe) a PCI-X
because express has an "x" in it (maybe). This is highly frustrating
and requires the reading of the "specs" page to find out exactly what
its true interface is.

Another darker thought of mine as to why PCI-E is often called PCI-X,
is to kill the competition.

What do you understand the following acronyms to mean?

PCI-X,
PCIx,
PCX,
PCI-E,
PCIe
Click to expand...

The reason I've posted this question is that when using any of the
above acronyms will 90% of the time bring up PCI express returns and
its not just an Australian phenomena.

The AMD 8131 chipset only has / had PCI and PCI extended slots, so many
of us are stuck in this standard.
Now that most video cards are PCI express its hard finding compatable
hardware, I'd love to go with the higher bandwidth bus of PCI express
16.
PCI extended has a peak on a 133MHz bus of about 1GB, where if I recall
correctly the x16 is getting about 4GB
 
It would depend on the PCI-X implementation. A PCIe x4 slot is faster than
64-bit PCI-X at 66 MHz. It equals 64-bit PCI-X at 133 MHz. However, the PCIe
lanes are dedicated. PCI-X bandwidth is shared amongst all the slots, if I'm
not mistaken?
 
I'm no electrical engineer. (I design aerospace hydraulic and mechanical
systems, which are actually intuitive...)

For nVidia's *currently available* Quadroplex, there's a small adapter card
that plugs into the host system's PCIe slot. A 6.5-ft proprietary cable then
runs from back of the adapter card to the main Quadroplex chassis where all
the GPUs are housed. This actually allows an SLI motherboard to drive two
Quadroplex systems in further SLI...

According to Tomshardware:
http://www.tomshardware.com/2004/11/29/the_tft_connection/page4.html
A single-link DVI cable transfers data at 1.65 GB/s. A dual-link cable
presumably doubles that, at which point it exceeds the capacity of AGP 8x.
The technology is definitely there for external graphics.
 
* First of One:
It would depend on the PCI-X implementation. A PCIe x4 slot is faster than
64-bit PCI-X at 66 MHz. It equals 64-bit PCI-X at 133 MHz.
Click to expand...

PCI-X 133MHz does theoretically 1066MB/s while PCE4x does "only"
1000MB/s (250MB/s per lane). PCI-X266 does 2133MB/s which is way more
than PCIe 4x.
However, the PCIe
lanes are dedicated. PCI-X bandwidth is shared amongst all the slots, if I'm
not mistaken?
Click to expand...

Right.

Benjamin
 
* (e-mail address removed):
The reason I've posted this question is that when using any of the
above acronyms will 90% of the time bring up PCI express returns and
its not just an Australian phenomena.
Click to expand...

Right, it's also a problem elsewhere. I can't count the number of shops
here that don't get the aconyms right, causing confusion all over the
place...
PCI extended has a peak on a 133MHz bus of about 1GB,
Click to expand...

Nope, it has a peak on 133MHz DDR which results in 2.1GB/s...
where if I recall
correctly the x16 is getting about 4GB
Click to expand...

Correct.

Benjamin
 
* First of One:
I'm no electrical engineer. (I design aerospace hydraulic and mechanical
systems, which are actually intuitive...)
Click to expand...

Right, much more than gfx card ;-)
According to Tomshardware:
http://www.tomshardware.com/2004/11/29/the_tft_connection/page4.html
A single-link DVI cable transfers data at 1.65 GB/s. A dual-link cable
presumably doubles that, at which point it exceeds the capacity of AGP 8x.
The technology is definitely there for external graphics.
Click to expand...

This is wrong. Single Link DVI does 1.65 Gbit per second, not GByte! And
1.65Gbit/s is just 211MB/s.

Benjamin
 
Right... Tomshardware wasn't rigorous with editing. It even says "10 bit
signal" at the top. 10 bit x 165 MHz is thus 1.65 gigabit/s.

Dual-link DVI would thus be capable of ~ 412 MB/s, which is actually in the
ballpark of another interface - SATA II.
 
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