Graphic Cards PCI Express 2.0 doubt

Status
Not open for further replies.
A

ashishkushwaha

Inactive
Contributor
Hi all,

We all must be aware that the PCI Express 2.0 slot is coming. I know that the new pci express 2 slot will be able to play the older PCI express graphics cards. But what my question is that ... Will the older MOBO's with PCI express 1 slot be able to play the future PCI express 2.0 graphics card (whenever they are released).

I know that even if they will be able to work together, the newer cards will work at half the bandwidth. But my question is WILL it work at all. PCI Express 2 based graphics card on older PCI Express slots ???????????

Thanks
 
we can compare PCI Ex 1.0 with AGP4x slot and PCI Ex 2.0 with AGP8x slot (AGP 1.0, 2.0, 3.0- soPCI Ex 1.0, 2.0,3.0) i think PCI Ex 2.0 will be 32x so card supporting 32x may work in PCI Ex 1.0 to work in 16x mode. if the pin design is different and if its overhauled to a bigger slot then i may be wrong.
 
  • Like
Reactions: 1 person
I think they may design the newer PCIE 2.0 slots differently just to sell new mobos. Otherwise who wd buy newer mobos with PCIE 2.0?
 
PCI Express 2 will be backward compatible afaik, and I dont think the graphic cards are even hitting the current limits of pci ex 1 yet ... so having pci ex 2 cards in pci ex 1 slots wont bottleneck the card imo ... the more important feature with v2 is the ability to draw up more power from the mobo itself so no need for a extra power connector or only a single power connector in case of ati cards :P
 
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.The Pci-e 2.0 can be used with old cards supporting 1.0 and 1.1 of Peripheral Component Interconnect Express[PCI-e] slots. The PCi-e 2.0 wil provide more bandwidth so there will be gr8 boost in performance :) Here are few features of 2.0

  • PCI compatibility using the established PCI software programming models, thus facilitating a smooth transition to new hardware while allowing software to evolve to take advantage of PCI Express features
  • Enhanced Completion Timeout Control, which includes required and optional aspects, reduces false timeouts and increases the ability to ‘tune’ the timeouts
  • Function Level Reset and Access Control Services, giving enhanced robustness and support of certain IOV features (optional)
  • Slot Power Limit Changes to allow for higher powered slots, which support the newer, high-performance graphics cards. This new feature works in tandem with the 300W Card Electro-mechanical specification
  • Speed Signaling Controls to enable software to determine whether a device can operate at a specific signaling rate, which can be used to reduce power consumption, as well as provide gross level I/O to memory
 
^^ NO... :P A device or card should only run on 1.1 if it has 2.5 GT/s as the bandwidth.. If newer card I mean 2.0 based card did not have 2.5 GT/s bandwidth and having newer 5.0 Gt/s bandwidth then only they will run in Pci-e 2.0 :P :S
 
Dark Star said:
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.The Pci-e 2.0 can be used with old cards supporting 1.0 and 1.1 of Peripheral Component Interconnect Express[PCI-e] slots. The PCi-e 2.0 wil provide more bandwidth so there will be gr8 boost in performance :) Here are few features of 2.0

  • PCI compatibility using the established PCI software programming models, thus facilitating a smooth transition to new hardware while allowing software to evolve to take advantage of PCI Express features
  • Enhanced Completion Timeout Control, which includes required and optional aspects, reduces false timeouts and increases the ability to ‘tune’ the timeouts
  • Function Level Reset and Access Control Services, giving enhanced robustness and support of certain IOV features (optional)
  • Slot Power Limit Changes to allow for higher powered slots, which support the newer, high-performance graphics cards. This new feature works in tandem with the 300W Card Electro-mechanical specification
  • Speed Signaling Controls to enable software to determine whether a device can operate at a specific signaling rate, which can be used to reduce power consumption, as well as provide gross level I/O to memory
Click to expand...

ashishkushwaha said:
^^^

So it basically means that we can RUN PCI express 2.0 based cards on existing PCI Express 1.0 or 1.1 MOBOS :) :)
Click to expand...

The above states that the PCIe 2.0 slots are backwards compatible... not the cards :) You can use your l33t PCIe 1.0/1.1 cards in 2.0 slots, not vice versa :)
 
Then suppose if the upcoming Geforce 9 is say pci express 2.0 based ... then there is no way it can be made to work on current MOBO's having PCI Express 1.0 or 1.1 slot ... :(
 
Dark Star said:
^^ NO... :P A device or card should only run on 1.1 if it has 2.5 GT/s as the bandwidth.. If newer card I mean 2.0 based card did not have 2.5 GT/s bandwidth and having newer 5.0 Gt/s bandwidth then only they will run in Pci-e 2.0 :P :S
Click to expand...

Read carefully :P If Geforce 9 series or R650 wil have 2.5Gt/s and 5.0 Gt/s both bandwidth then u can but if they will only have 5.0 Gt/s then it won't be ;)
 
So what would one suggest for a person like me who is gonna upgrade in a month or two. Since i am spending a huge amount a want to make sure it is future proof to some extent.

So should i buy a mobo with PSI Express 2.0 slot (P35 of upcoming X38) or should it a current 680i SLI. Or should i wait 2 to 3 months will some new nforce chipset comes ????
 
Well, we can only wait and see when its announced.

PCI-E 2.0 cards, may work on PCI-E 1.0 Slots, which will hardly be a bottleneck anyways.
 
ashishkushwaha said:
So what would one suggest for a person like me who is gonna upgrade in a month or two. Since i am spending a huge amount a want to make sure it is future proof to some extent.

So should i buy a mobo with PSI Express 2.0 slot (P35 of upcoming X38) or should it a current 680i SLI. Or should i wait 2 to 3 months will some new nforce chipset comes ????
Click to expand...

Get P35 :hap2: They are the/ will be the defacto soon :clap: Thought performance is not more than 680i SLI but they provide more features and upgrade platform than 680i :clap:
 
Yep,

PCI-e 1.0 cards will work on PCI-e 2.0 slots

PCI-e 2.0 cards *may* work on PCI-e 1.0 slots

Reason being apart from the signalling rate differences, there's also the other issue about increased power being provided through a PCI-e 2.0 slot. A PCI-e 2.0 card may not get the required juice through a PCI-e 1.0 slot and could malfunction or wreck that slot. All in all there are many tiny reasons which could crop up , so as of now its not an absolutely confirmed case.

The Intel P35, AMD RD700, nVidia MCP72 are going to support PCI-e 2.0 .
 
Features for PCI Express II include better formance at 5GHz PHY, device virtualisation, trusted platforms, and different sizes - or form factors as the jargon goes.

As with agp...its backward compatible so no probs there...happy to hear that cause i just got myself a spanking new 8800gts...after upgrading from my old x800xl AGP
 
Status
Not open for further replies.
Top Bottom