Can i get a clear answer on pcie 1.0 vs 2.0?

EpiclesOf4wesome

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I can't find a consistent, clear answer on pci CARD 1.0 vs 2.0 performance wise. I know almost all of it is forwards/backwards compatible, but is there any noticeable difference between the two interfaces? Theoretical situation;
two cards, same everything (speed, processors, memory, mem type, color, smell, etc) but one is pci express 1.0 (not x16, 8, or 4) and the other is pcie 2.0. I already know that 2.0 vs 3 is just about nothing.

The card in theory here is radeon 6970. assume mobo, and other components are same between the card's environments.
Any noticeable difference? And not 1% fps, but at least 10% fps difference. Thanks for any help!
 
@EpiclesOf4wesome: The answer is that it'll make no practical difference for a HD6970, it's not fast enough to take advantage of the higher PCI-E 2.0 bandwidth.
There will be some, small, drop in performance, but you'll need to run benchmarks or compare games with FRAPS to spot the difference.

Now go and make yourself a nice mug of cocoa and relax. ;)
 
Bandwidth on 1.0 is 250 MB/s

Bandwidth on 2.0 is 500 MB/s

Bandwidth on 3.0 is 984.6 MB/s

Bit Rate on 1.0 is 2.5 GT/s

Bit Rate on 2.0 is 5.0 GT/s

Bit Rate on 3.0 is 8 GT/s

On a x16 slot with 16 lane comparison would be

Bandwidth on 1.0 is 4 GB/s

Bandwidth on 2.0 is 8 GB/s

Bandwidth on 3.0 is 15.754 GB/s

Bit Rate on 1.0 is 40 GT/s

Bit Rate on 2.0 is 80 GT/s

Bit Rate on 3.0 is 128 GT/s
 

EpiclesOf4wesome

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yeah, i've seen the bitrates, transfer speeds, etc, but that, solely based off the data, means that a 2.0 card is twice as powerful/ fast as 1.0, assuming there's no bottleneck elsewhere in the system. but that's not the truth is it? i have yet to see anyone say 2.0 is 2x the speed of 1.0. and thank you for the fast answer, but I did ask about performance, not data.


Okay, now I HAVE heard 2.0 is twice 1.0 about 10 seconds after I thought I hadn't. So, what is '1.0 speed'? I've never heard such a term. I've always known speed to be... well i've always seen the speed to be around 500 mhz for effective clock. Does 2.0 double the speed? In that case why would 1.0, or even 2.0 exist anymore when 3.0 would, then be about three times v1.0 and 1 1/2 times 2.0? Thanks again for the speedy response, im just very confused now.
 

millwright

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Look at the chart. Everything is double, across the chart, except for the bit rate.
From Wikipedia
"PCI Express
version Line code Per lane In a ×16 slot (16-lane)
Raw bit rate[a] Bandwidth[a] Raw bit rate[a] Bandwidth[a]
1.0 8b/10b 2.5 GT/s 2 Gbit/s 250 MB/s 40 GT/s 4 GB/s
2.0 8b/10b 5 GT/s 4 Gbit/s 500 MB/s 80 GT/s 8 GB/s
3.0 128b/130b 8 GT/s 7.877 Gbit/s 984.6 MB/s 128 GT/s 15.754 GB/s
4.0 128b/130b 16 GT/s 15.754 Gbit/s 1969.2 MB/s 256 GT/s 31.508 GB/s
In each direction."

1.0a and 1.1 hasn't existed in a while, just on old stock.

2.0 must be cheaper, as the still use it as a secondary slot.
The majority of cards for sale are probably still 2.0 or 2.1
 

EpiclesOf4wesome

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omg, nooo! I do not care about the data, the facts, the physical specs. I want to know if there is any visible difference between 1.0 and 2.0 that I will notice while gaming at medium settings (I guess i should have stated that first). I know that 2.0 is physically double but what of the only important part- PERFORMANCE. Let's stop beating around the bushes and get to the point; THE ANSWER
sorry if I seem irritated.
 
@EpiclesOf4wesome: The answer is that it'll make no practical difference for a HD6970, it's not fast enough to take advantage of the higher PCI-E 2.0 bandwidth.
There will be some, small, drop in performance, but you'll need to run benchmarks or compare games with FRAPS to spot the difference.

Now go and make yourself a nice mug of cocoa and relax. ;)
 

EpiclesOf4wesome

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Thank you, so much. I tried to make the question really clear, but I guess people just don't get how to answer the question asked (no offense to the other answerers, they were helpful and a bit entertaining). Sooo yeah, thank you very very much for your help.
 

millwright

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Except I said this in my first reply.

"PCI-e 2.0 is twice as fast as 1.0, but if the card doesn't exceed 1.0 speed you won't see a difference."

No offence, but some people just don't know how to read, and comprehend..
 

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