Adam Leventhal

Because actually like 64 core Milan, like the 7713P, or even if you go up a little bit, getting that in 225 watts or 240 watts, that was actually really nice. Really nice, yeah. That was really nice. Performance per watt on Milan is really pretty great.

Uh, yeah, I mean, I definitely, I mean, when you get, you know, it's hard to compare to the, you know, 192 Zen five C cores, uh, in, in that range. But, um,

Uh, yeah, I mean, I definitely, I mean, when you get, you know, it's hard to compare to the, you know, 192 Zen five C cores, uh, in, in that range. But, um,

Once you kind of get to Zen 5, I mean, I still miss that there's no 225-watt, 64-core part, but I think this is where you're going to see this from our end, trying to think about how do we get a little more flexibility, leverage the fact that you have base DRAM has increased in capacity without going to 3D-stacked RDMs, just because that part of the balance and price equation starts getting...

Once you kind of get to Zen 5, I mean, I still miss that there's no 225-watt, 64-core part, but I think this is where you're going to see this from our end, trying to think about how do we get a little more flexibility, leverage the fact that you have base DRAM has increased in capacity without going to 3D-stacked RDMs, just because that part of the balance and price equation starts getting...

really thorny. So the fact that you have 128 gig RDIMS, um, is useful, especially when you start looking at the fact that two DPC stops making, gets challenging, uh, fast, uh, there. So I think there's a bunch of different skews you can kind of start to look at. You know, I think one thing I've been keeping my eye on is actually the 160 core, um, Zen five C, uh, as one thing to look at.

really thorny. So the fact that you have 128 gig RDIMS, um, is useful, especially when you start looking at the fact that two DPC stops making, gets challenging, uh, fast, uh, there. So I think there's a bunch of different skews you can kind of start to look at. You know, I think one thing I've been keeping my eye on is actually the 160 core, um, Zen five C, uh, as one thing to look at.

Cause like that kind of keeps you below 400 Watts, uh, So I think it's still like a group E CPU as opposed to a group G in the IRM. So do you want to describe a little bit of those terms? When you say the Group G versus Group E, what are those things?

Cause like that kind of keeps you below 400 Watts, uh, So I think it's still like a group E CPU as opposed to a group G in the IRM. So do you want to describe a little bit of those terms? When you say the Group G versus Group E, what are those things?

Yeah, when AMD creates a new socket, they put out what they call an infrastructure roadmap or IRM, and then they basically are predefining different TDP ranges into these groups. So, for example, Group E probably has some range off the top of my head from like 320 to 400 watts. Um, these new 500 watt, uh, CPUs, I sometimes joke are group G guzzlers, uh, just cause they, they definitely take a lot.

Yeah, when AMD creates a new socket, they put out what they call an infrastructure roadmap or IRM, and then they basically are predefining different TDP ranges into these groups. So, for example, Group E probably has some range off the top of my head from like 320 to 400 watts. Um, these new 500 watt, uh, CPUs, I sometimes joke are group G guzzlers, uh, just cause they, they definitely take a lot.

Um, but you can design your platform to different TDP kind of thresholds, uh, these kinds of different infrastructure ranges, and then you'll get different kind of CPU and core counts. So like, I think if we look at, um, there's like three or four different 64 core CPUs. I think there's like the 95, 35, uh, which is kind of like the, uh, you know, almost 300 watt, uh, 64 core.

Um, but you can design your platform to different TDP kind of thresholds, uh, these kinds of different infrastructure ranges, and then you'll get different kind of CPU and core counts. So like, I think if we look at, um, there's like three or four different 64 core CPUs. I think there's like the 95, 35, uh, which is kind of like the, uh, you know, almost 300 watt, uh, 64 core.

It's like, that'll be like a group a CPU. Yeah. And that kind of gives you what the tells you kind of what the TDP range and what you as the platform designer can kind of tweak, uh, from what the min to max is on there.

It's like, that'll be like a group a CPU. Yeah. And that kind of gives you what the tells you kind of what the TDP range and what you as the platform designer can kind of tweak, uh, from what the min to max is on there.

Um, whereas like the others will come to group E or some of these even smaller ones, um, like some of the 32 and 16 cores, if they're not getting cranked up for frequency might even be in like group B, uh, And related.

Um, whereas like the others will come to group E or some of these even smaller ones, um, like some of the 32 and 16 cores, if they're not getting cranked up for frequency might even be in like group B, uh, And related.

Yeah, that's a good point. So I think a lot of what we do is a bunch of work that we do with actually Eric, who's also on here. We're trying to figure out, hey, what's the right balance of how many stages, how many components do we need to kind of reach what kind of what power group?

Yeah, that's a good point. So I think a lot of what we do is a bunch of work that we do with actually Eric, who's also on here. We're trying to figure out, hey, what's the right balance of how many stages, how many components do we need to kind of reach what kind of what power group?

So, for example, if we designed when we did SP three, we designed what they called Group X, which was the group they added later for the 3D V cache and like max frequency skews. Maybe it's like a 240 or 280 watt max. But then we ran kind of a 225 watt CPU in there the entire time, giving us plenty of margin, plenty of headroom, which meant that, you know, our power subsystem was very clean.