Discuss: PCI express 2.0 is not compatible with 1.0/1.0a, only 1.1

[victor_c26]

from THE source:



http://www.pcisig.com/news_room/faqs/pcie2.0_faq/

read that page.

Jesus crap people! Don't scare us like that. I still have an RS480 motherboard from MSI. I was about to kick the ceiling.

Yes, the ceiling.

[shabby]

from THE source:



http://www.pcisig.com/news_room/faqs/pcie2.0_faq/

read that page.

Alright somebody ban AthlonXP1800/Dragunov for spreading fud.

[Dragunov]

Asus said it, I just post what Asus posted in their FAQ

I also wanted to know if I buy a new GPU, I still can place it on this 680i

[ViN86]

Asus said it, I just post what Asus posted in their FAQ

I also wanted to know if I buy a new GPU, I still can place it on this 680i
most PCIe 2.0 devices are backwards compatible with older PCIe revisions.

[Dragunov]

So another problem solved :)

So I still can upgrade my CPU and GPU, so my 680i board is not soooo bad at all :)

[ViN86]

So another problem solved :)

So I still can upgrade my CPU and GPU, so my 680i board is not soooo bad at all :)
cmon now Drag...

you really think nvidia would leave older boards high and dry with their new line of GPU's? they want to sell as many as possible, so that means catering to both new and older revisions of PCIe.

[AthlonXP1800]

most PCIe 2.0 devices are backwards compatible with older PCIe revisions.

We have to wait and see on 29 October to read G92 reviews to find out if it been tested on PCIe 1.0a and 1.1 motherboards, the first review was tested with X38 chipset motherboard.

[Dragunov]

cmon now Drag...

you really think nvidia would leave older boards high and dry with their new line of GPU's? they want to sell as many as possible, so that means catering to both new and older revisions of PCIe.
Well, it all depends on those organization who makes the rules for PCI Express, companies just can follow the rules, that's all :)

[AthlonXP1800]

cmon now Drag...

you really think nvidia would leave older boards high and dry with their new line of GPU's? they want to sell as many as possible, so that means catering to both new and older revisions of PCIe.

Nvidia and ATI had left older AGP 1.0 3.3V boards high and dry, none of it worked with new AGP 2.0 1.5V cards years ago then the same thing went with AGP 3.0 0.8V.

[Monolyth]

I'd say the biggest issue is that PCIE 2.0 provides more wattage to a card, PCIE 2.0 devices will probably be expecting this power and will require less power from the express connectors.

So it makes sense that 2.0 going backwards to 1.0/a/.1 would not work from a power supply point-of-view. Really depends how PCIE devices choose to receive their power. A smart hardware designer would've taken into consideration that future upgrades to the spec would increase allocated power. So the card will take what it can from the slot then depending on your setup you connect one or two extra PCIE connectors.

*shrug* Some clarification of this issue by NVIDIA/Intel/etc. would be good though.

[SOAD]

im a dumbass :$

will pci2.0 cards work in the evga 680i.

im sorry my brain has frozen

[Dragunov]

Normally yes ....

But it all depends on the signal given, if the signal is a bit different between PCI Express 2.0 and 1.1, 1.0/1.0a, the devices don't recognize eachother

[ViN86]

We have to wait and see on 29 October to read G92 reviews to find out if it been tested on PCIe 1.0a and 1.1 motherboards, the first review was tested with X38 chipset motherboard.
im pretty sure G92 will work on older PCIe version.
Well, it all depends on those organization who makes the rules for PCI Express, companies just can follow the rules, that's all :)
true...
Nvidia and ATI had left older AGP 1.0 3.3V boards high and dry, none of it worked with new AGP 2.0 1.5V cards years ago then the same thing went with AGP 3.0 0.8V.
good point. thankfully, i was too young to experience that lol. i started seriously building PC's (as in, spending decent cash) on AGP 3.0 boards/cards, hehe.

[technoid]

The most important thing I seen in the PCI SIG FAQ was this, it states PCIE 2.0 is backwards compatible with 1.0 and 1.1.


Q4: It sounds as if both speed grades are supported in the PCIe 2.0 specification?
A4: The PCIe Base 2.0 specification supports both 2.5GT/s and 5GT/s signaling rates, in order to retain backward compatibility with existing PCIe 1.0 and 1.1 systems. Aside from the faster bit rate, there are a number of improvements in this new specification that allow greater flexibility and reliability in designing PCIe links. For example, the interconnect can be dynamically managed for platform power and performance considerations through software controls. Another significant RAS feature is the inclusion of new controls to allow a PCIe link to continue to function even when some lanes become non-operational.

http://www.pcisig.com/news_room/faqs/pcie2.0_faq/

[Dragunov]

We all hope this is the truth ...

I hope they gonna test their PCI Express 2.0 boards soon on 1.0/1.0a and 1.1 mainboards, so we can read reviews about that

That's the only way we are completely sure about it

Cause not gonna buy a newer card if it's not supported by my mainboard

*update*

Dutch again: http://www.hardware.info/nl-NL/news/ynCcmZqTwpqa/8800GT_in_SLI_getest/

The 8800 GTs are tested in 3DMark06 with following configuration:

Intel QX6850 @ 3.6 GHz
ASUS Striker Extreme mainboard
2 GB Corsair DDR2 memory
Silverstone OP1000 PSU
Windows XP Media Center

[victor_c26]

I already ordered my 8800GT anyway, so I'll know pretty soon. I'll post the results by November second, as that's when I'll have the free time to install it.

[Amuro]

Well, Anandtech reviewed/tested the 8800GT using a 680i board, which means 2.0 cards do work on 1.0 boards.

[harl]

http://gathering.tweakers.net/forum/list_messages/1241374/0

Acording to this page 680i has PciE 1.1

Anyway I heard of someone who has tested a 8800GT in a VIA K8T890

[andy_nv]

So let me get this straight, I can't put a PCI-E 2.0 card like the 8800GT on my P965 mobo because it's PCI-E 1.0 ? I would at least need a P35, that's PCI-E 1.1.
From the mobo side, a PCI-E 2.0 board like the X38 will acept any video card, it's backwards compatible ?

[victor_c26]

I installed my 8800GT already. And guys, GUYS, it works.

I have a PCI-E 1.0a motherboard. Don't worry.

[Zapablast05]

I installed my 8800GT already. And guys, GUYS, it works.

I have a PCI-E 1.0a motherboard. Don't worry.


What board is it?

[Dragunov]

THX for ur reply!!!!!!!!

[court65]

I just got a BFG 8800gt and plugged it into my ECS K8t890-A, it was a no go, its said to be a PCI x16 slot, but no display on my lcd, I did however plug it into my Evga Nforce 680i mobo and it worked perfectly, whats the difference? both PCI x16, and I think they're both 1.0 or 1.1 but thiers a major difference since I cant get a display with one but I can with the other.:afro:

[Dragunov]

first slot on a 680i is definately a 1.1, other slots can be 1.0a

[XDanger]

AFAIK (by 1 google)ECS K8t890-A is a combo mobo meaning the pci-e goes thru the agp so its not really pci-e and so doesnt work with certain cards.

You wouldnt want to use it with anything over a 7800 as its 4x pci-e

2 hpphr od w ;py @_ ;p; >>MRTF??