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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 09:11 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 08:36 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 08:26 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 12:34 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 01:30 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...
sverek
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#5753105 Posted on: 01/22/2020 08:59 AM
Better safe than sorry. Would be sad if inactive PCI-E 4.0 added additional cost for the chipset.
Better safe than sorry. Would be sad if inactive PCI-E 4.0 added additional cost for the chipset.
Undying
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Posts: 12499
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#5753108 Posted on: 01/22/2020 09:18 AM
Great platform that will be. Chipset that support pcie 4.0 but cannot use and an 300w tdp 10core already outdated. Intel these days...
Great platform that will be. Chipset that support pcie 4.0 but cannot use and an 300w tdp 10core already outdated. Intel these days...
anticupidon
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Senior Member
Posts: 4596
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#5753111 Posted on: 01/22/2020 09:35 AM
When I was little I always ran against older kids from other blocks, and I won many times.
They got to the point :
Yeah, tomorrow, I'll bring my special running shoes and I will win, because you are a cheater.
Talking about special chipset that will make everything ok and forgotten.
Intel, what are smoking, buddy?
When I was little I always ran against older kids from other blocks, and I won many times.
They got to the point :
Yeah, tomorrow, I'll bring my special running shoes and I will win, because you are a cheater.
Talking about special chipset that will make everything ok and forgotten.
Intel, what are smoking, buddy?
Astyanax
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Senior Member
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#5753116 Posted on: 01/22/2020 09:47 AM
well the signal wasn't completely clean in Zen 2 so i don't see the excuse flying here.
though not surprised intel can't get a first generation gen 4 controller right, they couldn't with gen 3.
well the signal wasn't completely clean in Zen 2 so i don't see the excuse flying here.
though not surprised intel can't get a first generation gen 4 controller right, they couldn't with gen 3.
rl66
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#5753160 Posted on: 01/22/2020 12:46 PM
well the signal wasn't completely clean in Zen 2 so i don't see the excuse flying here.
though not surprised intel can't get a first generation gen 4 controller right, they couldn't with gen 3.
Nope the problem with Zen2 cpu is chipset dependent, it's for this reason that it is possible on some 3** and 4** chipset but deactivated (also it's an argument to sell more X570 too).
I hope for Intel that they will fix it with another chipset and a new socket (1201? good idea isn't it? maybe i am trolling a bit...) .
well the signal wasn't completely clean in Zen 2 so i don't see the excuse flying here.
though not surprised intel can't get a first generation gen 4 controller right, they couldn't with gen 3.
Nope the problem with Zen2 cpu is chipset dependent, it's for this reason that it is possible on some 3** and 4** chipset but deactivated (also it's an argument to sell more X570 too).
I hope for Intel that they will fix it with another chipset and a new socket (1201? good idea isn't it? maybe i am trolling a bit...) .
squalles
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#5753162 Posted on: 01/22/2020 12:51 PM
Ok, maybe in 2028 we can see any improvement using pci expresd 4.0 over 3.0 on new top high end videocard
Ok, maybe in 2028 we can see any improvement using pci expresd 4.0 over 3.0 on new top high end videocard
asturur
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Senior Member
Posts: 511
Joined: 2010-05-12
#5753169 Posted on: 01/22/2020 01:06 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 )
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 )
Kaarme
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#5753179 Posted on: 01/22/2020 01:37 PM
Haha, this is ridiculous. Though in a sense understandable because apparently ASMedia failed at making a chipset for Zen2, and thus we still haven't got anything but the partially flawed X570 (a variation of the CPU io chip itself). Seems like Intel's billion dollars R&D had no better luck.
Haha, this is ridiculous. Though in a sense understandable because apparently ASMedia failed at making a chipset for Zen2, and thus we still haven't got anything but the partially flawed X570 (a variation of the CPU io chip itself). Seems like Intel's billion dollars R&D had no better luck.
Astyanax
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#5753182 Posted on: 01/22/2020 01:47 PM
Nope the problem with Zen2 cpu is chipset dependent, it's for this reason that it is possible on some 3** and 4** chipset but deactivated (also it's an argument to sell more X570 too).
I hope for Intel that they will fix it with another chipset and a new socket (1201? good idea isn't it? maybe i am trolling a bit...) .
im sorry but you don't have any idea what im talking about.
it has nothing to do with chipsets, the gen 4 controller in zen 2 experiences unusual noise related errors and rather than admit a problem and tell people they may have to drop back to gen 3 properly, they dialed back the smu logging and covered it up.
Nope the problem with Zen2 cpu is chipset dependent, it's for this reason that it is possible on some 3** and 4** chipset but deactivated (also it's an argument to sell more X570 too).
I hope for Intel that they will fix it with another chipset and a new socket (1201? good idea isn't it? maybe i am trolling a bit...) .
im sorry but you don't have any idea what im talking about.
it has nothing to do with chipsets, the gen 4 controller in zen 2 experiences unusual noise related errors and rather than admit a problem and tell people they may have to drop back to gen 3 properly, they dialed back the smu logging and covered it up.
tunejunky
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#5753210 Posted on: 01/22/2020 03:06 PM
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.
Ok, maybe in 2028 we can see any improvement using pci expresd 4.0 over 3.0 on new top high end videocard
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.
tunejunky
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#5753211 Posted on: 01/22/2020 03:08 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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#5753237 Posted on: 01/22/2020 05:23 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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#5753244 Posted on: 01/22/2020 05:49 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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#5753253 Posted on: 01/22/2020 06:38 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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kekw.