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Old 01-13-2010, 10:32 PM   #1
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Default How much of a difference does PCI express 2.0 make?

For flight simulator games (microsoft) or general gaming how big of a difference does a PCI express 16 x 2.0 make? I am looking at motherboards some have an 2.0 some don't, does it matter much?

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Old 01-14-2010, 01:32 AM   #2
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Default Re: How much of a difference does PCI express 2.0 make?

generally its anywhere between 4 and 8 frames, although it can vary based on the bandwidth requirements of your card.
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Old 01-14-2010, 04:10 AM   #3
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Default Re: How much of a difference does PCI express 2.0 make?

No, it's not that at all. It all depends on the game. Flight simulator can be pretty taxing. Most graphic cards can't fully utilize the bandwidth of a 2.0 lane, let alone a 1.0 lane. But, it should be worth it to get a 2.0 compliant board for flight simulator.
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Old 01-14-2010, 04:37 AM   #4
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Default Re: How much of a difference does PCI express 2.0 make?

The difference is not very major. I don't see any difference in my games on PCI-E 2.0.
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Old 01-14-2010, 12:54 PM   #5
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Default Re: How much of a difference does PCI express 2.0 make?

I think it depends on the card a lot. For mine it's 4-8 frames when I put it in an x8 2.0 slot (which has similar bandwidth to x16 1.0) but I have a very powerful card. If its a slow card there will be almost no difference at all. Sorry, should've been more specific.
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Old 01-14-2010, 02:00 PM   #6
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Default Re: How much of a difference does PCI express 2.0 make?

It has a lot more bandwith, but you wouldn't notice a big big difference. Like said, it's from 4-8 frames.
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Old 01-14-2010, 02:21 PM   #7
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Default Re: How much of a difference does PCI express 2.0 make?

Quote:
PCI Express 2.0 provides several advantages to hardware manufacturers, which are difficult to depict in a technical analysis like this one. Power requirements can be software controlled by adding or reducing the number of PCI Express lanes and the link speed used. In addition, higher graphics card power requirements can now be satisfied. At the same time, PCIe 2.0 is complete compatible with prior hardware revisions, and it does not increase cost for consumers, as the transition happens smoothly between one graphics chip generation and the next. From this standpoint, we clearly recommend PCIe 2.0 to anyone, because it has no disadvantages.

But is PCIe 2.0 really necessary yet? As long as a graphics solution can operate with data that is stored within its local video frame buffer memory, both the reasonably mainstream Radeon HD 3850 and the hardcore GeForce 9900 GX2 will operate close to their maximum performance, even if the PCI Express link width is limited to x8 or x4. Once larger textures need to be accessed, as is the case in Crysis or Microsoft’s Flight Simulator X, interface bandwidth becomes a crucial element. Any link width below x16 will noticeably limit these games’ playability.

The answer, thus, has to be "yes": you want maximum bandwidth, and PCI Express 2.0, for all sorts of sophisticated 3D applications. Benchmarks such as Futuremark’s 3DMark06, PCMark Vantage, Prey or Quake provide proof from the other end of the spectrum, though: they can fit all the graphics data into the 512 MB (Radeon HD 3850) or 2x 512 MB (GeForce 9800 GX2) frame buffers.
http://www.tomshardware.com/reviews/...-2-0,1915.html


It will really kick in on higher resolutions especially with max settings.
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Old 01-14-2010, 03:28 PM   #8
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Default Re: How much of a difference does PCI express 2.0 make?

Of course, you must have x16 lanes while gaming, especially in games that really takes advantage of it.
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