Threadripper Motherboards with all 88 PCIe lanes wired up?

[gordan]

Are there any?

AFAICT none even have all 4 PCIe slots wired for full x16 connectivity. I am ideally looking for something similar to the Asrock EPYCD8 in terms butof PCIe slots but for Threadripper.

 

[orbitalwalsh]

Are there any?

AFAICT none even have all 4 PCIe slots wired for full x16 connectivity. I am ideally looking for something similar to the Asrock EPYCD8 in terms butof PCIe slots but for Threadripper.

not going to happen for the fact one is for servers doing the full x16 set up and 8 channel ram with the latter for Prosumers . PCIe lanes are 128 vs 64

 

[gordan]

not going to happen for the fact one is for servers doing the full x16 set up and 8 channel ram with the latter for Prosumers . PCIe lanes are 128 vs 64

3990X has 88 PCIe lanes, rather than 64. That was precisely the point I was making - none of the Threadripper motherboards have more than 64 wired up. I want those extra 24 PCIe lanes' worth of PCIe slots on a motherboard.

 

[orbitalwalsh]

3990X has 88 PCIe lanes, rather than 64. That was precisely the point I was making - none of the Threadripper motherboards have more than 64 wired up. I want those extra 24 PCIe lanes' worth of PCIe slots on a motherboard.

**sorry wrong chip

The 3990X also supports 64 lanes of PCIe 4.0, which provides twice the throughput per lane of the PCIe 3.0 interface on Intel processors. Additionally, the TRX40 chipset provides 16 GB/s of throughput between the processor and the chipset, which comes courtesy of eight PCIe 4.0 lanes. In contrast, Intel supports 4 GB/s of throughput over its DMI link through the PCIe 3.0 interface.

AMD ties the compute chiplets together via the Infinity Fabric to a large central 12nm I/O die (IOD) that houses two 32x PCIe Gen4 controllers and two dual-channel DDR4 memory controllers. However, this IOD is significantly different than the one present in the EPYC Rome 7702P, largely because AMD culled support for eight-channel memory and halved PCIe 4.0 support to 64 lanes.


The 3990X's IOD is the same as the one in the 3970X and 3960X, but AMD fused off the four additional Infinity Fabric On-Package (IFOP) units, which are used to communicate with the CCDs, on those models because they weren't needed. As with the previous models, each of the 3990X's die has its own IFOP connection to the IOD.

seen its 88 but only 72 is usable

and the reason being- capped EPYC version is needed for full 8 channels an 88 lanes

The new AMD Ryzen Threadripper 3990X is a 64 core, 128 thread processor designed for the high-end desktop market. The CPU is a variant of AMD’s Enterprise EPYC processor line, offering more frequency and a higher power budget, but fewer memory channels, fewer PCIe, and a lower memory capacity support. The 3990X is at that cusp between consumer and enterprise based on its features and cost, and it’s ultimately going to compete against both. On paper, users who don’t necessarily need all of the 64 core EPYC features might turn to the 3990X, whereas consumers who need more than 32 cores are going to look here as well. We’re going to test against both.

MSI creator has 4x PCIe 4.0 x16 slots and then 3x m.2 PCIe 4.0 in theory taking up to 60 lanes if its wired correctly. hard to tell

***ABOVE IS WRONG. MSI then state x16/x8/x16/x8 FOR PCIE X16 slots in manual.....

https://asset.msi.com/pdf/main/global/presale_v2/Creator-TRX40?

aorus xtreme is 2x PCIe 4.0 x16 and 2x PCie 4.0 x8 with 4X M.2 PCIe 4.0 taking it to 64 lanes

Gigabyte has wired their 4x M.2 together to allow RAID, MSI have 2x m.2 via CPU and on via TRX4 chipset so no triple raid

https://www.gigabyte.com/Motherboard/TRX40-AORUS-XTREME-rev-10#kf

 

[gordan]

Bottom line - Threadrippers below 3990x only have 64 PCIe lanes advertised and motherboards are designed for them.
3990x has 24 additional lanes advertised, but no motherboards have more than 64 wired up.

However you spin it, 3990x has more than any motherboard available today seems to be wired up for.

So to re-iterate - are there any motherboards coming with all of the PCIe lanes that 3990x offers wired up, ideally with the extra ones going to PCIe slots?

 

[orbitalwalsh]

Bottom line - Threadrippers below 3990x only have 64 PCIe lanes advertised and motherboards are designed for them.
3990x has 24 additional lanes advertised, but no motherboards have more than 64 wired up.

However you spin it, 3990x has more than any motherboard available today seems to be wired up for.

So to re-iterate - are there any motherboards coming with all of the PCIe lanes that 3990x offers wired up, ideally with the extra ones going to PCIe slots?

72... Some lanes are lock from what reviewers say . Again read through reviews of design and double check, ones iv seen stated all 88 can't be used regardless of board . Trx80/W is were 8 channel ram and more PCIe lanes come from the Chipset

Also, the other Zen2 Thread rippers have the SAME PCIe lane count - 88 but only 72 useable

2666 255W $2999 $107.10
Threadripper 3970X 32 / 64 3.7 / 4.5 *128 88 Gen 4 (72 Usable)

Nd as mentioned above, you'll have to wait for trx80 . And then you'll have to be Running Windows Enterprise . Windows 10/Pro can't run it well

https://www.google.com/amp/s/www.te...ster-is-too-much-for-windows-10-pro-to-handle

Most users after full lane support would be on Epyc platform

While the new sTR4 socket has the same number of pins as earlier-generation SP3 socket, the pinout is different, so the Threadripper 3990X needs a new TRX40 motherboard, along the lines of the ASRock TRX40 Taichi or GIGABYTE TRX40 Aorus Xtreme. These motherboards vary in price from about $450 to $850, depending on what features you want, but all support the PCIe 4.0 standard, up to 72 PCH PCIe lanes, faster RAM (up to DDR4 3200), and loads more USB and SATA ports

Socket handles it, but guessing workstation ones will offer better support

Uplink and downlink a seems to eat up Lanes with no control. Then you've got lanes going to USB 3.2

 

[gordan]

How can the reviewers tell that some of the lanes are locked if no motherboards have more than 64 lanes wired up? What are they testing with to reach that conclusion if there are no motherboards that have the extra 24 lanes that AMD advertises wired up?

 

[Quartz]

We did this just recently here.

 

[gordan]

Right, so in conclusion: There are currently no motherboards, available or announced, that provide the extra PCIe connectivity of 3990X compared to lesser Threadrippers.

 

[orbitalwalsh]

How can the reviewers tell that some of the lanes are locked if no motherboards have more than 64 lanes wired up? What are they testing with to reach that conclusion if there are no motherboards that have the extra 24 lanes that AMD advertises wired up?

We did this just recently here.

AMD are technically right, its 88 lanes, but only 72 available due to up and down stream links , and then you've got USB 3.2 taking up 4 I believe .

https://www.anandtech.com/show/1535...t-exist-neither-does-the-intel-lga1159-socket

seems waiting for higher end board isn't an option .

Right, so in conclusion: There are currently no motherboards, available or announced, that provide the extra PCIe connectivity of 3990X compared to lesser Threadrippers.

and again, 32 and 24 have 88 lanes, not able to use all of them

taken form 32 core product page

32 cores and 64 threads for lightning-fast creative workloads.

An unprecedented 88 total PCIe® 4.0 lanes to meet large GPU and NVMe needs.

explains allocation a little .So for 3rd time, you aint going to find a TRX40 88 PCIe 4.0 x16 board

56 lanes direct for devices and 16 direct from chipset. AMD TRX40 uses lower amount of lanes (though double the bandwidth then intel) from its chipset then Intel at 24 .

https://www.extremetech.com/computi...x-3960x-intel-10980xe-cascade-lake-cpu-review

One major upgrade to the TRX40 platform is PCIe 4.0 support. There’s a shiny, new PCIe 4.0 x8 lane connecting chipset and CPU, offering 4x the bandwidth of the old PCIe 3.0 x4 link. The new TRX40 supports up to 72 usable PCIe 4.0 lanes and up to 12x USB 3.0 ports. Technically the TRX40 has 88 PCIe 4.0 lanes, but 16 of them are reserved for the system’s use. Threadripper also now supports 256GB of RAM, with ECC support available, if motherboard OEMs choose to provide it.

Aorus X399 Xtreme uses the max amount of Lanes , but has least amount of USB 3.2 because of it