AMD corrects socket AM5 power specifications: 170W TDP and 230W PPT

AMD corrects socket AM5 power specifications: 170W TDP and 230W PPT

At Computex 2022, Dr. Lisa Sui, CEO of AMD, revealed the Ryzen 7000 series processors, as well as the associated AM5 platform. But while discussing specifics about its new platform for Zen 4 and beyond, AMD inadvertently ended up creating confusion about the AM5 platform by quoting different power-ups for different groups. Ultimately, at various points, AMD was quoting 170W as the highest nominal TDP supported by the platform, as well as a power packet tracking (PPT) rating, which is the absolute highest amount of power the chip can draw under load. Needless to say, these two claims should not be true, and correction was required.

As first reported by Tom’s Hardware team, AMD has published a statement that addresses the confusion and establishes the correct values. In short, the 170 Watt TDP was correct. Meanwhile, the PPT value is actually 230W – which is 1.35 times the TDP rating, typical of AMD’s Ryzen processors.

AMD’s full statement is below:

AMD wants to release a patch for socket strength and TDP limits for the upcoming AMD AM5 socket. AMD Socket AM5 supports up to 170W TDP with PPT up to 230W. TDP * 1.35 is the standard calculation for TDP v. PPT for AMD sockets in the “Zen” era, and the new 170W TDP range is no exception (170 * 1.35 = 229.5).

This new TDP cluster will enable significantly greater computing performance for higher-counter CPUs in heavy computing workloads, which will sit alongside the 65W and 105W TDP clusters that Ryzen is known for today. AMD prides itself on providing the enthusiastic community with transparent and candid product capabilities, and we want to take this opportunity to apologize for our mistake and any subsequent confusion we may have caused on this subject.

The overall increase in power specification numbers for the AM5 platform was not unexpected — part of the benefit of the move to LGA sockets are additional power delivery pins — but this finally settles the question of how much power the new AMD socket and platform is built for. to reach. No doubt motherboard vendors will (well) bypass this on their high-end boards, of course, but 170W/230W will be the base for any motherboard that wants to officially support high-end AM5 chips.

CPU power consumption has been on the rise for the past several years, as we are now in the Dark Silicon era. While individual CPU cores still consume a modest amount of power—in the order of 20W to 30W for a high-performance core—the overall power requirements are quickly proportional to high-end processors, which pack well over 16 cores. As a result, power delivery limits are typically a limiting factor for severely multi-threaded workloads, where CPUs have to fall behind clock speeds in order to stay within their power envelopes. Increasing the platform’s power limits, in turn, provides more headroom to sustain more cores running around the clock more often.

Although it’s worth noting that AMD’s clarifications today are for the AM5 socket, not the primary Ryzen 7000 chips that it’ll be using. AMD doesn’t necessarily have to take advantage of a socket’s full TDP right away — despite the MT performance reasons mentioned above, there’s a good reason for that. So officially, we still don’t know what the TDPs are for the high-end Ryzen 7000 processors; But unofficially, it wouldn’t be surprising to see the best chipset approaching 170 watts.

Finally, it looks like we should expect to see the Ryzen 7000 family hit TDP completely out of the gate. According to a comment from an AMD spokesperson on Reddit, the highest TDP of the Ryzen 7000 series will actually be 170W, with PPTs hitting 230W.

2022-05-26 22:00:00

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