Difference between pci express 2 0 and 2 1

hunterboy317

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Jun 10, 2011
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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=N82E16814130676&cm_re=nvidia_geforce_9800_gt-_-14-130-676-_-Product".

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.
 

ghostmagic

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Jun 7, 2011
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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.
 

designfriemel

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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:
 

designfriemel

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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.
 

designfriemel

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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.