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Pci-e 1.0 vs 2.0

Last response: in Graphics & Displays
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August 23, 2012 12:40:06 AM

I realized that my mobo supports pci-e 1.0 and my gfx card is 2.0 would I see a noticable improvement if I upgraded to a mobo that supports pci-e 2.0? I am aware that there is newer technology out there but have a limited budget and can't do a complete system upgrade right now. Any help/advise would be appreciated.

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a c 1411 U Graphics card
August 23, 2012 12:43:37 AM

Very few cards will be bottlenecked by the 1.0 interface. Unless you have the latest and greatest you will gain max 2% if you have a high end card couple of generations old. Hardly worth it.
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a c 365 U Graphics card
August 23, 2012 12:52:52 AM

It depends on what graphic card you have. PCI-e 2.0 has 2x the bandwidth of PCI-e 1.0. PCI-e 3.0 has 2x the bandwidth of PCI-e 2.0. So....

PCI-e 1.0 x16 = PCI-e 2.0 x8 = PCI-e 3.0 x4

If you have a very powerful graphics card like a GTX 670 or Radeon HD 7970, then I would say that you are being limited by the PCI-e 1.0 slot. A rough guess is you will probably see a 10% - 15% improvement in game performance. I have a Radeon HD 5850 in a PCI-e 1.0 slot and I have no issues with bottlenecking (at least that I am aware of).

The Radeon HD 5850 is about equivalent to a Radeon HD 7770 / Radeon HD 6850 depending on the game. If were talking about DX9 only effects, then the Radeon HD 5850 would provide better performance. Compared to a nVidia card, it would be about equal to the GTX 470 which is a little slower than the GTX 560 Ti.
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August 23, 2012 1:31:19 AM

I should have included which card I am running, it's a gts 250.
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Best solution

a c 1411 U Graphics card
August 23, 2012 1:46:21 AM

GTS250 is not bottlenecked by ver 1.0 PCIe!
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August 23, 2012 1:57:37 AM

Thanks for the information. The card seemed to work well but I wasn't sure about the pcie technology, I was hoping I was going to find out it would double its performance, oh well.
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a c 1411 U Graphics card
August 23, 2012 2:05:03 AM

Most likely the GTS250 is close to the max your CPU can keep up with as well.
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August 23, 2012 2:25:53 AM

rolli59 said:
Most likely the GTS250 is close to the max your CPU can keep up with as well.


I still have a lot to learn about what components will be compatible with others.
What do you look at to determine what the CPU's limit for a gfx card would be? I have an AMD 64 x2 athlon 5200 or 5400 which ever one is the 2.7ghz processor.

I will put the computer specs in my sig tomorrow to make this easier.
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September 2, 2012 12:21:15 AM

rolli59 said:
Most likely the GTS250 is close to the max your CPU can keep up with as well.


Finally got my equipment specs up, do you have a sec to help me understand what determines a cpu's limitations on what it can handle for a gfx card?
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September 2, 2012 12:25:09 AM

Best answer selected by rocus.
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a c 1411 U Graphics card
September 2, 2012 1:26:20 PM

It is hard to explain the CPU and GPU relationship apart from looking at generations of both during the Athlon X2 period GF8800GTX was top dog on the GPU market and GTS250 is in the same performance group. What basically happens if you have a more powerful GPU is that the CPU would run up to max load before the GPU would get close and be holding back the performance potential of the GPU.
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