Talk:Threadripper

	This article is within the scope of WikiProject Computing, a collaborative effort to improve the coverage of computers, computing, and information technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ComputingWikipedia:WikiProject ComputingTemplate:WikiProject ComputingComputing
???	This article has not yet received a rating on the project's importance scale.
	This article is supported by Computer hardware task force.

Brands

	This article is within the scope of WikiProject Brands, a collaborative effort to improve the coverage of brands on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.BrandsWikipedia:WikiProject BrandsTemplate:WikiProject BrandsBrands
???	This article has not yet received a rating on the project's importance scale.

Threadripper 9000 PCIe

> Threadripper (9000) CPUs support 48 PCIe 5.0 and 24 PCIe 4.0 lanes while Threadripper PRO CPUs support 128 PCIe 5.0 lanes. In addition, all processor models have 4 PCIe 4.0 lanes reserved as link to the chipset.

While the PRO part looks accurate, I think Threadripper 9000 non-Pro has more lanes.

You list 48+24, or 72 lanes. Plus 4 to chipset.

AMD website says 92 lanes, 4 for chipset, so 88 usable (of which 80 is PCIe Gen5). I think confusion is that some of the remaining PCIe lanes (88) can be configured as SATA by motherboard vendors. The technical breakdown images I saw only show 80 PCIe lanes on TR 9000 (and 48 on TR 7000). But if one count on the image it sum up only to 76 PCIe lanes, plus 4 lanes to a chipset. It is possible that remaining 4 or 8 missing lanes are dual-purpose for USB3 10Gbps.

And when looking at motherboards the one with highest PCIe count sums up to 80 (including to chipset), so 76 lanes. Plus 4 SATA. So about 84 total. Most other motherboards do have a bit less usually

Unfortunately all motherboards for Threadripper 9000, were actually designed for Threadripper 7000, so for obvious reasons, they were designed to only support about 76 or 80 lanes (including chipset). So none supports 88 (or 92 including chipset). But CPU does support it I guess.

Some other websites claim 48 lanes of gen5 + 32 lanes of gen4 + 4 gen4 to chipset, for total of 84.

Unless official AMD materials are incorrect.

Long story short - things do not add up.

The Threadripper PRO 9000 also does not add up exactly. Article says 128 gen5 lanes + 4 to chipset, but according to AMD, there are 4 to chipset (gen 4), and 128 gen5 lanes, but there are additional gen4/sata/usb3 lanes on a cpu, for a total of 148. But from my count there is only 124 gen5 lanes, plus 8 gen3 lanes, and 4 gen4 lanes to chipset, for total of 132. 2A02:168:F609:1:303D:9B23:E2D0:279D (talk) 01:51, 3 November 2025 (UTC)[reply]

After scratching my head a bit more about this, I think Threadripper 9000 (non-pro) has 80 physical PCIe gen5 lanes. 4 of them run currently at gen4 to current gen chipsets. So 76 gen5 lanes remain. Usually 4 of these lanes are configured for SATA, so 72. But technically it is 76. (and technically 80, if one would run without a chipset at all). From usual remaining 72, it is USUALY split into 48 gen5 and 24 gen4, but that is more of a motherboard choice, not CPU limitation. This does add up. Also mystery why AMD says 92/88 (total/usable) on their spec pages is because they also count the chipset downstream ports probably, and the cpu-chipset links too - this is bogus and misleading, but they maybe try to inflate numbers, and this is the only explanation I have to make numbers to add up. 2A02:168:F609:1:303D:9B23:E2D0:279D (talk) 03:03, 3 November 2025 (UTC)[reply]

Indeed the same logic works in Threadripper 9000 Pro. There are 128 gen5 lanes, plus 8 gen3 lanes in the processor. 4 of these gen5 lanes are used in gen4 mode to chipset. And when you add up also 8 PCIe gen4 lanes in WRX80 chipset we got: 128+8+8 = 144. That exactly matches what they say on the spec sheet. They also say 140 usable. (otherwise they double-count the cpu-chipset links). In practice only 136 are usable. But the CPU has 128 gen5 lanes (124 gen5 plus 4 to chipset running in gen4 mode), and 8 extra gen3 lanes (often some of them do run SATA3, but some of the gen5 lanes can also run in SATA3 mode). So not 128 gen5 + 4 gen4 as article states now. 2A02:168:F609:1:303D:9B23:E2D0:279D (talk) 03:24, 3 November 2025 (UTC)[reply]