First Intel platform with pci express 4.0 ?

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Michaelius

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Are there any rumours or roadmaps that show which Intel chipset will get support for pci express 4.0 ?
 
We probably aren't going to see the connector till sometime in 2017, I would guess that there will be an update to the 3.0 spec sometime soon but as of right now it's really hard to choke 3.0.
 
zaniix said:
what is there that 3.0 isnt good enough for?
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Well PCI express upgrade is more interesting than IPC improvements of Intel cpus recently so that's why I'm asking.

Plus I think that second generation of 16nm gpus are going to be limited by 3.0 bus.
 
Well we aren't even on the first generation of 16nm gpu's yet, so you got some time :)
 
Michaelius said:
Well PCI express upgrade is more interesting than IPC improvements of Intel cpus recently so that's why I'm asking.

Plus I think that second generation of 16nm gpus are going to be limited by 3.0 bus.
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I really think 3.0 isn't going to give us any limitations until after Pirate Islands and Pascal...maybe a couple/few generation after, perhaps.
 
Michaelius said:
Plus I think that second generation of 16nm gpus are going to be limited by 3.0 bus.
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Fantasizing is nice but reality bites:eek:. You really do not know how far are the present GPUs from filling up the 3.0 bus. You have no idea about business reality which has to focus on huge installed legacy base to make money.
 
Trimlock said:
We probably aren't going to see the connector till sometime in 2017, I would guess that there will be an update to the 3.0 spec sometime soon but as of right now it's really hard to choke 3.0.
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Yeah, the specification hasn't been finalized yet. http://www.eetimes.com/document.asp?doc_id=1326922&page_number=1

What's going to be funny is when PCIe 4.0 comes out, people will be complaining about how long the optical based successor takes. :D I wonder if the number of lanes will be widened using a new connector (so it doesn't get longer) in the time between copper and optical.
 
Don't expect it before Cannonlake, or possibly Skylake-E. It might even be held off until the tock after Cannonlake.
 
Michaelius said:
Well PCI express upgrade is more interesting than IPC improvements of Intel cpus recently so that's why I'm asking.

Plus I think that second generation of 16nm gpus are going to be limited by 3.0 bus.
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The thing is, when it comes to real time rendering, you will still want to have all textures already loaded into the card's VRAM. Because regardless of how fast the PCI E bus is, it will never be fast enough to feed the card with textures in such a way that the GPU do not have to wait for it. Whenever you get into a situation where your run out of VRAM, you graphics will always stutter as the card tries to move textures in and out.

As for the other data exchange during real time rendering, they are not bandwidth intensive, and we've yet to see 8x creating any issues, so we're definitely very far from getting close to utilizing current 16x, if at all.
 
The real benefit to PCI-E 4.0 is the overall increase in bandwidth available in a system. Cards that may have required a x8 PCI-E 3.0 connection will be able to perform the same with a x4 PCI-E 4.0 connection.

That being said, I wouldn't expect to see PCI-E 4.0 in a shipping product from Intel until the end of the decade. That is unless AMD somehow pulls a rabbit out of its hat...in that case Intel will bring it to market right away...:rolleyes:
 
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