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Intel Comet Lake-S CPUs and Z490 boards support PCI-E 4.0 (but it's not active)
A new report on the web indicates that the upcoming Comet Lake-S processors (tenth generation of Intel Core for desktop) actually do support PCI Express 4.0, some Z490 motherboards are designed for it as well. However an issue prevents PCIe 4.0 to become usable, so the platform will support PCI-E 3.0 instead.
The reason behind this is presence of Jitter in the Z490 chipset signal, that causes instability in the data signal and that menas that specifications required for the PCI-Express 4.0 certification are simply not met. PCI-E 4.0 is working at very high frequencies, and that requires that the signal be completely clean.
Several manufacturers added external clock generators to eliminate this Jitter, however not everyone did, so Intel made the decision to not support PCI-E 4.0 on this new platform.
Intel Comet Lake i5 and i3 spotted, both get HyperThreading but lower clock speeds - 12/28/2019 10:11 AM
Some info on Intels' pending Comet Lake processors has surfaced. The 14nm node fabricated processors are assumed to launch in April. Earlier on it was kind of confirmed that the lower positioned pro...
Intel Core i9-10900K 10-core Processor and Z490 Chipset Rumored to be released April 2020 - 12/10/2019 09:36 AM
Intel Generation 10 Comet Lake processors, based on Intel's 14nm process and an underlying microarchitecture that is Skylake is next year's desktop processor series from Intel. It makes a step towar...
ASUS to release X299 BIOS Updates for Intel Core i9-10980XE, 10940X, 10920X and 10900X - 12/02/2019 09:26 AM
Much like MSI, ASUS as well will be releasing new firmware updates soon for their X299 motherboards, specifically for Intel Core i9-10980XE, 10940X, 10920X and 10900X, and an effort to make them over...
Review: Intel Core i9 9900KS Special edition processor - all cores at 5 GHz - 11/15/2019 01:34 PM
Intel has released its flagship desktop processor in the non-HEDT segment. The 9900KS is their most premium Coffee Lake-S eight-core processor that has been discussed so abundantly. This little beast ...
Intel Core i9-10980XE Cascade Lake-X Benchmarks - 10/25/2019 02:30 PM
The way Intel distributed samples on processors to media remains a mystery, however over in Romania the first review on the Core i9-10980XE, surfaced. It's written by our colleage Tudo who tested Ca...
tunejunky
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Posts: 1240
Joined: 2017-08-18
#5753211 Posted on: 01/22/2020 04:08 PM
Is not about videocards, but about lines availability.
If pciEx4 is double fast than 3, i can use 8 line instead of 16 on a pci express 4.0 video card, get the performance of 3.0 at 16x. Use the free 8 lines for something else ( another nvme for example, a fast one )
exactly. and if that nvme is also pcie 4.0, along with the gpu you can do tons of work in little time
Is not about videocards, but about lines availability.
If pciEx4 is double fast than 3, i can use 8 line instead of 16 on a pci express 4.0 video card, get the performance of 3.0 at 16x. Use the free 8 lines for something else ( another nvme for example, a fast one )
exactly. and if that nvme is also pcie 4.0, along with the gpu you can do tons of work in little time
wavetrex
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Senior Member
Posts: 1416
Joined: 2008-07-16
#5753237 Posted on: 01/22/2020 06:23 PM
Just wait until nVidia announces their new generation Ampere, or 3000 series or whatever the name is and it will be PCIe 4.0 cards.
And AMD's RDNA(2) products will obviously be 4.0 as well.
No-one in their right minds would buy Z490 to willingly give up performance on their shiny new latest generation GPUs... especially considering that AMD's next gen with even more IPC and probably more clocks as well is basically just 6-7 months away from release.
How could they (Intel) screw this up so badly !?
Just wait until nVidia announces their new generation Ampere, or 3000 series or whatever the name is and it will be PCIe 4.0 cards.
And AMD's RDNA(2) products will obviously be 4.0 as well.
No-one in their right minds would buy Z490 to willingly give up performance on their shiny new latest generation GPUs... especially considering that AMD's next gen with even more IPC and probably more clocks as well is basically just 6-7 months away from release.
How could they (Intel) screw this up so badly !?
schmidtbag
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Joined: 2012-11-10
Senior Member
Posts: 5824
Joined: 2012-11-10
#5753244 Posted on: 01/22/2020 06:49 PM
Is not about videocards, but about lines availability.
If pciEx4 is double fast than 3, i can use 8 line instead of 16 on a pci express 4.0 video card, get the performance of 3.0 at 16x. Use the free 8 lines for something else ( another nvme for example, a fast one )
It only works that way if the device itself is PCIe 4.0 compatible. A 3.0 card in a 4.0 slot is still only going to operate at 3.0 speeds.
Is not about videocards, but about lines availability.
If pciEx4 is double fast than 3, i can use 8 line instead of 16 on a pci express 4.0 video card, get the performance of 3.0 at 16x. Use the free 8 lines for something else ( another nvme for example, a fast one )
It only works that way if the device itself is PCIe 4.0 compatible. A 3.0 card in a 4.0 slot is still only going to operate at 3.0 speeds.
EspHack
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Joined: 2010-01-03
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Joined: 2010-01-03
#5753253 Posted on: 01/22/2020 07:38 PM
maybe at gen 5.0 we will finally have enough lanes that we can spare some for 10g ethernet, and phones will be doing 50gbit lifi by then
maybe at gen 5.0 we will finally have enough lanes that we can spare some for 10g ethernet, and phones will be doing 50gbit lifi by then
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for games, sure.
but if you're a content creator the future is now. remember time = money, now leverage threadripper 3/ ryzen 2 with (most likely an Instinct) a pcie 4.o gpu and you're saving days of work in a week.