Ryzen 5600X and 5800X CPUs Can Have Two CPU dies

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#5876096
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The only possible reason I can come up with for these dies to exist is to maybe share something that isn't core-specific, like the L3 cache. I'm sure there are situations where all cores are good but maybe L3 isn't. Otherwise, it makes no sense why some would have this while others don't. It's not like Threadripper where they were just trying to distribute the load of the IHS using dummy chiplets. It'd be interesting if there are differences in benchmarks.
#5876101
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Those versions with two dies should have a different naming from the other ones, to identify them, and should be cheaper....
#5876108
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H83:

Those versions with two dies should have a different naming from the other ones, to identify them, and should be cheaper....
I don't think the main 6 or 8 cores are spread over 2 dies. So it's not like you're getting a worse chip compared to others with higher latency on some cores. It's just a failed dual die chip, the other die is completely inactive.
#5876109
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schmidtbag:

The only possible reason I can come up with for these dies to exist is to maybe share something that isn't core-specific, like the L3 cache. I'm sure there are situations where all cores are good but maybe L3 isn't. Otherwise, it makes no sense why some would have this while others don't. It's not like Threadripper where they were just trying to distribute the load of the IHS using dummy chiplets. It'd be interesting if there are differences in benchmarks.
Not sure how l3 cache outside the chiplet is usefull tho. Wouldn't it be slow? Important is that you do not get 8 or 6 cores split 4 +4 or 3+3 for some other weird reasons
#5876111
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H83:

Those versions with two dies should have a different naming from the other ones, to identify them, and should be cheaper....
If all of them meet the 5600X standard, I don't know why that would be. As the article states, probably a 5900X that failed and one of the chiplets was disabled.
#5876112
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Richard Nutman:

I don't think the main 6 or 8 cores are spread over 2 dies. So it's not like you're getting a worse chip compared to others with higher latency on some cores. It's just a failed dual die chip, the other die is completely inactive.
So those are basically chips that failed the test to be a 5900/5950X??? And they just left the other die because it´s faster and cheaper to produce? If that´s the case then no worries. But they can still sell them cheaper because i want a 5600/5800x for my next build!:p
#5876119
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asturur:

Not sure how l3 cache outside the chiplet is usefull tho. Wouldn't it be slow?
Yeah probably, but it's better than throwing away a whole die I guess. That's why I'm interested in benchmarks.
Important is that you do not get 8 or 6 cores split 4 +4 or 3+3 for some other weird reasons
That's why I find it so confusing. If none of the cores are accessible and if some products don't need the other die, what's the point of including one that serves no function, but has enough transistors in it to be recognized in software? That's how I came to my conclusion, that it must be used to make up for a defect that isn't within any cores.
#5876125
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I've really been hoping for an APU with more GPU grunt than the 3400G - 11 CUs isn't really enough. If they swapped one of the CCX dies on a 5950X for a GPU, that'd be awesome. This may be achievable with the new modular GPUs they're designing...?
#5876127
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BLEH!:

I've really been hoping for an APU with more GPU grunt than the 3400G - 11 CUs isn't really enough. If they swapped one of the CCX dies on a 5950X for a GPU, that'd be awesome. This may be achievable with the new modular GPUs they're designing...?
They didn't add more than 11 because APUs are severely starved for memory bandwidth. Performance scales up almost perfectly with RAM clock speed, which shows how bad the bottleneck is. Moving to RDNA2 and DDR5 will hopefully offer a hefty performance increase, but I doubt even that will be enough. If you want more performance, do anything you can to lower VRAM usage. Textures tend to soak up the most.
#5876133
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schmidtbag:

They didn't add more than 11 because APUs are severely starved for memory bandwidth. Performance scales up almost perfectly with RAM clock speed, which shows how bad the bottleneck is. Moving to RDNA2 and DDR5 will hopefully offer a hefty performance increase, but I doubt even that will be enough. If you want more performance, do anything you can to lower VRAM usage. Textures tend to soak up the most.
On-die HBM might help things, in this case.
#5876134
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Is 4+4 or 3+3 die split a problem on 5000 series compared to a "real" 6 or 8 core? The older generations had problems, but the Threadripper series did a lot to fix the transfer from die to die latency and i have not read anything bad about the 5900 and 5950. I think i would prefer a split die CPU to spread the heat out to a much larger surface, just like the Threadripper vs Intel monolith die.
#5876141
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BLEH!:

On-die HBM might help things, in this case.
Yes, it would. It'd also likely double the price, and it would take up enough space that there might not be room to add more CUs. At that point, you might as well just by a low-end dGPU.
#5876151
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H83:

Those versions with two dies should have a different naming from the other ones, to identify them, and should be cheaper....
Complete nonsense . They are exactly the same in terms of performance , they might overclock differently tho . It would explain why some chips can boost over 5ghz ( being 5900/5950 silicon in first place). I don't know yet for sure , but i speculate that my chip is in fact 5900x trimmed down. (not being able to clock over 1800 FCLK , and easily boosting around 5ghz). I will learn that soon enough )
#5876254
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If AMD makes an 8 core chip split into two CCDs, they need to use the 5700 model number, imho. If they release a 5800, I would hope it still uses 1 CCD. Frankly, I hope a 5700(x) also uses 1 CCD. I know a lot of people didn't read the article, so I'll reiterate that even if a 5800x comes with two CCDs, it's still using just one. The other one is totally unused. ditto for the 5600x and 5900x.
#5876347
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they should have had a dummy die on the package all along to assist with thermal transference off the substrate.
#5876358
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umeng2002:

If AMD makes an 8 core chip split into two CCDs, they need to use the 5700 model number, imho. If they release a 5800, I would hope it still uses 1 CCD. Frankly, I hope a 5700(x) also uses 1 CCD. I know a lot of people didn't read the article, so I'll reiterate that even if a 5800x comes with two CCDs, it's still using just one. The other one is totally unused. ditto for the 5600x and 5900x.
5800x has one ccd. If there are physically two, it uses one. Performance is the same. Your argument is not valid. +As of current knowledge these two ccds cpus overclock better.
#5876367
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@H83 so amd said they guarantee what ccd/ccx layout they sell for the different cpus/what the customers will get? lmao. what did you in your coffee, and where did you get it, wanna order some too.. 😀
#5876387
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The major disadvantage that can have this is that it consumes and heats something more the cpu that with only 1 ccd.
#5876404
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jose2016:

The major disadvantage that can have this is that it consumes and heats something more the cpu that with only 1 ccd.
it's exacly opposite , 2 ccd tend to be more cool due to bigger heat dispersion . Check 3300X vs 3100 ( a fine example ). There is no extra power draw , cores are perma sleep with 0W draw.

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