Shintai
Supreme [H]ardness
- Joined
- Jul 1, 2016
- Messages
- 5,677
http://techreport.com/news/31228/amd-shows-off-ryzen-ready-chipsets-and-motherboards-at-ces
Note that CPU+Chipset features goes together. X370/B350 features 6(2+4) SATA for example.
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Looks like there indeed confusion here, Tech Report, reports 32 PCIe lanes. CPU having 16pcie 3.0 for graphics, 4pcie 3.0 for I/O. PCH 8 pcie 2 plus 4pcie for SataE? So what is the real answer? This looks closer to a Z170 chipset. I guess you want more PCIe 3 lanes you need to get a two cpu board.![]()
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http://techreport.com/news/31228/amd-shows-off-ryzen-ready-chipsets-and-motherboards-at-ces
Note that CPU+Chipset features goes together. X370/B350 features 6(2+4) SATA for example.
Looks like there indeed confusion here, Tech Report, reports 32 PCIe lanes. CPU having 16pcie 3.0 for graphics, 4pcie 3.0 for I/O. PCH 8 pcie 2 plus 4pcie for SataE? So what is the real answer? This looks closer to a Z170 chipset. I guess you want more PCIe 3 lanes you need to get a two cpu board.
While a single very powerful GPU at the moment seems to be most ideal I would like an option for two as in for VR in the future plus as time goes on that can change. 2 8x PCIe 3 is mostly sufficient for today GPU's even SLI/CFX that may not be true in the future - unless AMD actually Caches with like an SSD on a gaming card right on the GPU then 4x would probably be too much.
Grrrrrr, need more info - accurate and clear would help too.
LGA1151 are all PCIe 3 lanes
So the cpu has 24 PCIe 3.0 lanes and chipset 8 pcie 2.0 lanes = 32?
Chipset link is the other 4 PCIe lanes which is not exposed for user (which would be enough bandwidth for the 8x pcie 2). Well this seems rather weak indeed! So how would a 3 gpu setup be configured? PLX would really be needed. Sounds like the two M2 slotted boards will have one 4x pcie 3 and the other 4x pcie 2 - to split them 2x each PCIe 3 I would think would be stupid. Sata ports are also limited on this chipset so extra controllers will probably be used using the pcie 2 lanes.You cant count the chipset link. The CPU got 16+2 or 4 depending on config. Chipset got 8 2.0.
But yes, that's how they got 32. Tho you could say it should be 36 then, because the chipset also got 4 3.0 that links it to the CPU. Alink/DMI, same thing.
Chipset link is the other 4 PCIe lanes which is not exposed for user (which would be enough bandwidth for the 8x pcie 2). Well this seems rather weak indeed! So how would a 3 gpu setup be configured? PLX would really be needed. Sounds like the two M2 slotted boards will have one 4x pcie 3 and the other 4x pcie 2 - to split them 2x each PCIe 3 I would think would be stupid. Sata ports are also limited on this chipset so extra controllers will probably be used using the pcie 2 lanes.
So I can see why the MSI board has the second PCIe slot wired for 8x because you have no other choice unless using a PLX chip. Still would be limited to 16x PCIe 3 to the CPU but for like AMD GPU to GPU CFX, it would be PCIe 3 with a PLX chip, which could help in the future but with added latency though.You PLX the hell out of it as you mention.
So I can see why the MSI board has the second PCIe slot wired for 8x because you have no other choice unless using a PLX chip. Still would be limited to 16x PCIe 3 to the CPU but for like AMD GPU to GPU CFX, it would be PCIe 3 with a PLX chip, which could help in the future but with added latency though.
That is somewhat disappointing for multi-GPU setups, single GPU it would not matter too much for awhile.
lol, I surely hope the two M2 slotted boards don't have one slot PCIe 2x 3.0 and the other slot PCIe 2x 3.0 or Sata III if both are used. I guess you can make them both Sata III.Well lets be honest, multi GPU is dead. But the storage/IO part is still bad. Had it been 3.0 lanes instead of 2.0 it would have helped a lot. I do think 24 lanes on Z270 is overkill. Something like 16 for graphics and 16 for I/O is good, all 3.0 of course. SATA is dying and NVME is the successor and you want 4 lanes per port.
So that would give you GPU+3 M.2/U.2 and then 4 lanes for NIC, Wifi etc.
lol, I surely hope the two M2 slotted boards don't have one slot PCIe 2x 3.0 and the other slot PCIe2x or Sata III if both are used. I guess you can make them both Sata III.
Bandwidth wise, the chipset 8x PCIe 2 is like only using four Intels PCIe 3 lanes but Intel has 24 PCIe 3s. Yes storage can be an issue especially if you work with massive size 4k, 360 videos with multiple drives.
I am going to have to see how this chipset performs with mixed loads as in 100% GPU usage + Multiple storage device use. The real limitations maybe not apparent now but 2-4 years from now could be utterly different. In other words when updated RyZen cpus come about you might not want to bother with these initial motherboards. With Intel you are usually forced to upgrade the motherboard after a few CPU's while the A4 should last much longer but the initial platform maybe too limiting.
My AM3 is on Fifth CPU (PhenomII x2 was to setup board and for good bios, PhenomII x4 965 unlocked to 6 core until Bulldozer was released) 8120 - 8350 - 9590 and going strong today but time is running out with no more upgrades possible. AMD got a number of sells from me cpu wise because of the long period of time AM3 was applicable.AMD haven't had a long lasting platform since AM3. Not being platform/socket restricted both physically and electrically is a good thing despite what a niche crowd thinks. How many AM3 users didn't go through more than 1 board due to new features anyway.