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Difference between pci express 2 0 and 2 1

Last response: in Graphics & Displays
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January 28, 2011 2:18:10 PM

Can i connect PCI 2.1 x 16 bus interface graphic card in PCI 2.0...?

More about : difference pci express

a b U Graphics card
January 28, 2011 2:27:08 PM

Yes - they are backward compatible - but the max speed of the card will be lowered to the PCI-e 2.0 standard (not a problem for most cards since nothing really saturates the 2.0 spec currently)
January 28, 2011 2:35:31 PM

Thx...! :-)
January 28, 2011 2:41:46 PM

I'm planning 2 buy a graphic card 4 my sys...
Its confg. are
Intel DH55TC mother board
Core i5-650 processor
4-GB DDR3 RAM
Can u suggest me..?
June 10, 2011 7:58:16 AM

It would depend on the wattage of the power supply to determine a card.
Also what would you(your sis) be doing on the computer(games, movies, etc...).
And it would really matter what your budget would be.

However, if you had say a 400W power supply and wanted a normal card(not too fancy or too cheap), I would go with something like an EVGA(NVIDIA) GeForce 9800GT 512MB PCI-express 2.0 x16 on "http://www.newegg.com/Product/Product.aspx?Item=N82E168...".

That is the card i would buy if i had a better PSU(Power Supply)...i only have a 300W power supply so i bought an HIS(ATI) Radeon HD 5450 1GB PCI-express 2.1 x16 from the same website.
June 10, 2011 9:42:42 AM

JDFan said:
Yes - they are backward compatible - but the max speed of the card will be lowered to the PCI-e 2.0 standard (not a problem for most cards since nothing really saturates the 2.0 spec currently)


Incorrect, there is no speed difference between 2.0 and 2.1. PCI-e 2.1 adds the new management features for PCI-e which will be used mostly in the 3.0 cards (whenever that standard is released) but there is no difference in speed between the two types. There is however a difference in speed between 1.0 and 2.0 and a medium to high end graphics card used on PCI-e 1.0 will encounter a throughput bottleneck. To my knowledge no graphics card exists which requires a 2.1 slot and will not function on a 2.0 slot.
November 15, 2011 11:34:02 PM

ghostmagic said:
Incorrect, there is no speed difference between 2.0 and 2.1. PCI-e 2.1 adds the new management features for PCI-e which will be used mostly in the 3.0 cards (whenever that standard is released) but there is no difference in speed between the two types. There is however a difference in speed between 1.0 and 2.0 and a medium to high end graphics card used on PCI-e 1.0 will encounter a throughput bottleneck. To my knowledge no graphics card exists which requires a 2.1 slot and will not function on a 2.0 slot.


http://www.amd.com/us/products/workstation/graphics/ati-firepro-3d/v9800/Pages/v9800.aspx#4

tab specification - system requirements.
Available PCI Express® 2.1 x16 slot (double wide)

I'm puzzled - why shouldn't it work with 2.0? :heink: 
a c 104 U Graphics card
November 16, 2011 4:47:25 AM

Normally 2.1 will work with 2.0, though i'm not complete sure because it's a workstation card, don't know much about them. With 1.0 mobo's there could be a problem if it has an old bios.
a c 104 U Graphics card
November 16, 2011 4:48:42 AM

"friemel" sounds Dutch btw. Correct ?
November 16, 2011 12:21:02 PM

GreenDutchAlien said:
"friemel" sounds Dutch btw. Correct ?


it might me dutch but I'm not ;)  I'm from Germany
November 16, 2011 12:26:39 PM

I'll ask amd support - the v9800 might be the fastest card at the moment but i doubt that it requires 2.1.
as ghostmagic said speed of 2.0 is the same. I'll post amd's feeback here.
a c 104 U Graphics card
November 16, 2011 1:33:02 PM

+1 neighbour.
November 16, 2011 2:56:32 PM

k, amd support shines in this case:


"Yes, the FirePro V9800 card is compatible with a PCI Express 2.0 hardware compliant motherboard.

In order to update this service request, please respond, leaving the service request reference intact.

Best regards,

AMD Global Customer Care"


so for now the question is solved, i reckon.
a c 104 U Graphics card
November 16, 2011 6:26:10 PM

Yep. :D 
!