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post #1681 of 6048
As stated, benching will show that. But if you read, modern games DO NOT FULLY SATURATE the PCI-e(my mistake) bandwidth, ie they do not require the transfer speeds available to them, this is an area of your PC which is ahead of its time. A quick google will bring up plenty of reviews on the matter.

Goto the intel website, and look up the spec of your i7 3xxx chip. It will clearly state it only supports PCI-e 2.0. Example shown is for the 3930 the most popular choice for people with x79 boards. It is also a 32nm chip.

http://ark.intel.com/products/63697/Intel-Core-i7-3930K-Processor-(12M-Cache-up-to-3_80-GHz)


This is a requirement of your motherboard to allow PCI-e 3.0. For this read up on your current manufacturors website. To quote one for you... For my board which also supports Gen 3,

Note:
To run the PCI Express 3.0 slots in Gen 3 speed, please must install the 22nm CPU which supports PCI Express 3.0. If you install the Sandy Bridge CPU, the PCI Express 3.0 slots will run only at Gen2 speed.

These chips are yet to be released.
 
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post #1682 of 6048
SB-E does support PCI-E 3.0 just Intel has not had it certified hence why it only states PCI-E 2.0. Plus I don't know why you keep pushing that point when I've just shown you an example of a 3930K with a 680 utilising PCI-E 3.0 speeds. If it did not support PCI-E 3.0 then why would the bandwidth be stated at over 4GB/s faster than theoretical PCI-E 2.0 16x speeds?

Also as demonstrated by CallsignVega in his thread it is not the game that requires PCI-E 3.0 but it is when you are running SLI that the additional PCI-E 3.0 bandwidth is required. Unless, of cause, you think he is part of some conspiracy to lie to us all, right?

Seriously, it is beyond belief that people say some things despite having clear evidence to prove the opposite.
Quote:
Originally Posted by SuPaTeD View Post

As stated, benching will show that. But if you read, modern games DO NOT FULLY SATURATE the PCI-e(my mistake) bandwidth, ie they do not require the transfer speeds available to them, this is an area of your PC which is ahead of its time. A quick google will bring up plenty of reviews on the matter.
Goto the intel website, and look up the spec of your i7 3xxx chip. It will clearly state it only supports PCI-e 2.0. Example shown is for the 3930 the most popular choice for people with x79 boards. It is also a 32nm chip.
http://ark.intel.com/products/63697/Intel-Core-i7-3930K-Processor-(12M-Cache-up-to-3_80-GHz)
This is a requirement of your motherboard to allow PCI-e 3.0. For this read up on your current manufacturors website. To quote one for you... For my board which also supports Gen 3,
Note:
To run the PCI Express 3.0 slots in Gen 3 speed, please must install the 22nm CPU which supports PCI Express 3.0. If you install the Sandy Bridge CPU, the PCI Express 3.0 slots will run only at Gen2 speed.
These chips are yet to be released.
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post #1683 of 6048
Quote:
Originally Posted by SuPaTeD View Post

BTW. Those that are saying they have it running @ PCI-x 3.0 are lying, as only intel has the tech to do this. IT IS CPU INTEGRATED AND IS BUGGY CURRENTLY. So the chips are not currently commercially released. Intels 3 current Generation 3 i7 CPU's do not currently support it.
Tomorrow is the launch date for the new generation of Intel's CPU's.
Some people may say they have cracked it. Though this is a false report either from their hardware or they are just plain lying. PCI-x is embedded on the CPU, it is not controlled by a chip on the mainboard.
Just to clarify things.

you're in denial.
post #1684 of 6048
Instead of just stating stuff. Proof your point. I provided clear, concise information from the manufators themselves that you will be at PCi-e 2.0 level.

Here is some more info on it for you.

http://www.tomshardware.co.uk/geforce-gtx-680-review-benchmark,review-32404-5.html - Page 5

This is a very well trusted source within the community.
 
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post #1685 of 6048
You are either trolling at this point or just being stupid.

Look at the bandwidth on the Tom's hardware link you posted. 11.7GB/s @ PCI-E 3.0 and 6.0GB/s @ PCI-E 2.0

Now, my results on my rig currently:

303

Oh wait look at that bandwidth: 11.6GB/s and 12GB/s.
Quote:
Originally Posted by SuPaTeD View Post

Instead of just stating stuff. Proof your point. I provided clear, concise information from the manufators themselves that you will be at PCi-e 2.0 level.
Here is some more info on it for you.
http://www.tomshardware.co.uk/geforce-gtx-680-review-benchmark,review-32404-5.html - Page 5
This is a very well trusted source within the community.
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post #1686 of 6048
Your still not getting it. The cards have a channel each. 6 x 2 is 12. (Back to play school here.) The CPU supports multiple PCI-e 2.0 16x lanes. Your speed is correct. If your were running them @ PCI-e 3.0 level your combined bandwidth would be almost 11.7x11.7 = 23.4

This is where your advantage comes in LGA1155 i7 doesnt. Hence the 8x + 8x Configuration.However as one thing we can agree on. Games do not require this amount of bandwidth only benching.
 
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post #1687 of 6048
Quick question:

Since when running SLI cards don't share VRAM, if I were to buy a second GTX680 down the line when the 4GB versions are out, would I be able to pair a 2GB version with a 4GB version and have the system use the full extent of the 4GB cards VRAM?
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post #1688 of 6048
Lol, are you serious?

Firstly PCI-E 2.0 16x is not a lane. the x16 part denotes it is 16 lanes. So, yes, lets go "back to play school".

Each PCI-E 2.0 lane supports 500MB/s and is full duplex. So a 16 lane PCI-E 2.0 slot would support a theoretical 16 * 500 = 8000 MB/s each direction (hence the full duplex)
Each PCI-E 3.0 lane supports 1000MB/s and is also full duplex. A 16 lane PCI-E 3.0 slot would support a theoretical 16 * 1000 = 16000 MB/s each direction.

If you don't believe me read it from the group responsible for the PCI specs:

http://www.pcisig.com/news_room/faqs/pcie3.0_faq/#EQ2

(Also note the "Total bandwidth represents the aggregate interconnect bandwidth in both directions.")

Now, in the screenshot I posted the Host to Device bandwidth is listed at 11646MB/s. This is the bandwidth in the direction to the GPU exclusively (NOT BOTH DIRECTIONS). Look above and you will see that PCI-E 2.0 only has 8000MB/s available in one direction.

The other value, device to host bandwidth, is the bandwidth from the GPU exclusively (again, NOT IN BOTH DIRECTIONS) and is listed at 12077MB/s. Again this is higher than the PCI-E 2.0 8000MB/s in one direction.

If you combine the both directions you get 23723.8 MB/s. I refer you to the "Total bandwidth for x16 link" from http://www.pcisig.com/news_room/faqs/pcie3.0_faq/#EQ2 and you'll see that PCI-E 2.0 only has 16GB/s available in total.

Also when you say "cards" as a plural, I'm only running a single card.
Quote:
Originally Posted by SuPaTeD View Post

Your still not getting it. The cards have a channel each. 6 x 2 is 12. (Back to play school here.) The CPU supports multiple PCI-e 2.0 16x lanes. Your speed is correct. If your were running them @ PCI-e 3.0 level your combined bandwidth would be almost 11.7x11.7 = 23.4
This is where your advantage comes in LGA1155 i7 doesnt. Hence the 8x + 8x Configuration.However as one thing we can agree on. Games do not require this amount of bandwidth only benching.
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post #1689 of 6048
Quote:
Originally Posted by TheBenson View Post

Quick question:
Since when running SLI cards don't share VRAM, if I were to buy a second GTX680 down the line when the 4GB versions are out, would I be able to pair a 2GB version with a 4GB version and have the system use the full extent of the 4GB cards VRAM?

No, it would default to the lowest one.
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post #1690 of 6048
Quote:
Originally Posted by Tomdarkness View Post

Lol, are you serious?
Firstly PCI-E 2.0 16x is not a lane. the x16 part denotes it is 16 lanes. So, yes, lets go "back to play school".
Each PCI-E 2.0 lane supports 500MB/s and is full duplex. So a 16 lane PCI-E 2.0 slot would support a theoretical 16 * 500 = 8000 MB/s each direction (hence the full duplex)
Each PCI-E 3.0 lane supports 1000MB/s and is also full duplex. A 16 lane PCI-E 3.0 slot would support a theoretical 16 * 1000 = 16000 MB/s each direction.
If you don't believe me read it from the group responsible for the PCI specs:
http://www.pcisig.com/news_room/faqs/pcie3.0_faq/#EQ2
(Also note the "Total bandwidth represents the aggregate interconnect bandwidth in both directions.")
Now, in the screenshot I posted the Host to Device bandwidth is listed at 11646MB/s. This is the bandwidth in the direction to the GPU exclusively (NOT BOTH DIRECTIONS). Look above and you will see that PCI-E 2.0 only has 8000MB/s available in one direction.
The other value, device to host bandwidth, is the bandwidth from the GPU exclusively (again, NOT IN BOTH DIRECTIONS) and is listed at 12077MB/s. Again this is higher than the PCI-E 2.0 8000MB/s in one direction.
If you combine the both directions you get 23723.8 MB/s. I refer you to the "Total bandwidth for x16 link" from http://www.pcisig.com/news_room/faqs/pcie3.0_faq/#EQ2 and you'll see that PCI-E 2.0 only has 16GB/s available in total.
Also when you say "cards" as a plural, I'm only running a single card.

LOL This supated guy is hilarious. He is either trolling you guys or he actually believes what he is saying. If it is the latter, I feel sorry. Why is it usually the new people with few posts that come into overclock forums and make ridiculously wrong statements with such conviction? Seems to be a trend.
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