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Intel XMP and AMD EXPO in a single RAM

After the official announcement of AMD EXPO and although hardly any technical data was given about it (it’s not that they are too lacking apart from a few new ones), many of us thought that it would be ideal if once and for all manufacturers offered RAM modules with profiles for Intel and AMD at the same time. Well, it looks like it’s already in the AIB’s plans, as a famous overclocker confirms that EXPO Intel XMP and AMD can be together in one RAM memory modulebut how are they going to do it?

There are two issues to be resolved here. The former is the worst, because while Intel XMP is proprietary technology with royalties and certification, amd expo something different gets in the way and so they collide in some concepts and in the implementations. Normally, and thanks to the IMC, the secondary and tertiary timings were very likely to work better with different platforms, and that’s why specific modules for Intel or AMD were released. DDR5 is a complete game-changer and that could soon be a thing of the past, at least partially as far as sales are concerned.

Faced with the advantages of Intel XMP, AMD reacts with EXPO

AMD-Ryzen-7000-EXPO-RAM

It’s not that EXPO isn’t patented technology per se, because it is, but it has no royalties of any kind and that’s always appreciated, but knowing that the platform form AM5 was going to support XMP 3.0 without problem, was it necessary that AMD invest time and money in the EXPO?

Well the answer is yes. The reasons we can read on AMD’s website range from a personalized experience and great performance to specific optimization for its processors, and they are undoubtedly right.

The new parameters of front end which we have seen recently as well as changes in the caches show that the internal latencies will not be the best, but they will be mitigated and even mitigated (at least in part) with the frequency of the SI and the general of the nuclei. Therefore, the next step is to try to minimize the gap between CPU and memory by setting profiles to the maximum by manufacturers.

XMP and EXPO: two profiles in a single RAM module, no need to choose

INTEL-XMP-AMD-EXPO-1-RAM

It was Toppc who brought to light something really interesting and that is that for the first time two totally different profiles optimized for two disparate platforms will be in a single RAM module. The key is in something we’ve seen many times before and more specifically last seen in XMP 3.0: The SPD.

DDR5 modules have different bytes and blocks to save information reflected by SPDs and therefore can be used to save profiles for AM5 platforms and profiles for platforms Intel LGA1700.

For this reason and also as an incentive, specific low latency profiles could be added as AMD plans to do, so we could have two AMD profiles and one Intel profile, where they would already be optimized according to the use that is going to be given to the PC: games, rendering etc…

It looks good in the image above, where you can see three columns. The first is from Intel, where the three profiles (SPD 5, 6 and 7 with their respective blocks) are fully occupied by XMP 3.0. The AMD column passes through the exact same point, but the exception is that EXPO would only work with half of the SPD page leaving the rest blankwe assume that for a user profile or other secondary manufacturer.

Intel-XMP-3.0

Finally, the column on the far right shows the inclusion and working of both profiles in the same module, where Intel would copy the SPD Page 5 and 6, while AMD would do it with the remaining SPD Page 6 and the rest of the 7 which correspond to specific blocks 13, 14 and 15. Note that in this specific case taken as an example, the U1 and U2 To belong to user profiles personalized, while the Px are imposed by the manufacturer.

This would leave us with four specific profiles for Intel and two for users in XMP 3.0 and with a general profile with P1 for AMD, a P2 and a free one for the user. Combining, Intel loses the P3 to AMD, and the rest is met.

In this way, the two proprietary technologies can coexist in the same RAM module. Now it’s just up to the manufacturers to get their act together and start implementing them into their DDR5 memories, hopefully at the same price as those that are individual for each platform.

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