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Gibbo ETA for 3900x?

marms said:
Overclockers have stock of every 3000 series processor released except the 3900x
Either TR4 and Epyc are taking the fastest cores or they simply don't have enough cores fast enough
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HRL said:
Bit harsh but as someone else pointed out, in case you missed it, stock isn’t an issue for any of the other SKU’s, only the 3900X.
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3900X is a 2xCCD part. Essentially double the resource of the others.
 
Rossi~ said:
Yes, hence it's not here yet as likely it requires the best of the best from the bin.
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Hahaha. That’s why I said the 3900X delays could be related to the 3950X binning process, and was promptly shot down by someone.

Thanks for confirming what I originally thought. :D
 
NuScorpii said:
At what point does binning happen? Are the chiplets binned before packaging or after?
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Yes of course, the chips that can hit 4.6Ghz at least single core boost get sent off to be packaged as 3900X's. Those that can hit 4.7Ghz are siphoned off to be made into 3950X's.

Remember, as someone above stated, 3900X and 3950X are made up of two CCX's (8C CCX + 4C CCX and 8C + 8C. Technically each CCX is 4-cores or two pairs of 4-cores, but there is zero penalty with inter-CCX communication between the pairs of 4-cores on the same CCX), so need two of these chiplets instead of just one. But only one of the chiplets needs to be able to hit 4.6Ghz or 4.7Ghz.
 
Boot_Loop said:
Remember, as someone above stated, 3900X and 3950X are made up of two CCX's (8C CCX + 4C CCX and 8C + 8C. Technically each CCX is 4-cores or two pairs of 4-cores, but there is zero penalty with inter-CCX communication between the pairs of 4-cores on the same CCX), so need two of these chiplets instead of just one. But only one of the chiplets needs to be able to hit 4.6Ghz or 4.7Ghz.
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3900X is 2x 6c CCDs with each CCD comprising of 2x 3c CCX.
 
Boot_Loop said:
Yes of course, the chips that can hit 4.6Ghz at least single core boost get sent off to be packaged as 3900X's. Those that can hit 4.7Ghz are siphoned off to be made into 3950X's.

Remember, as someone above stated, 3900X and 3950X are made up of two CCX's (8C CCX + 4C CCX and 8C + 8C. Technically each CCX is 4-cores or two pairs of 4-cores, but there is zero penalty with inter-CCX communication between the pairs of 4-cores on the same CCX), so need two of these chiplets instead of just one. But only one of the chiplets needs to be able to hit 4.6Ghz or 4.7Ghz.
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I’ve already seen that on my 3900X. CCX 1 hits decent speeds on all cores and maxes out at 4.645? CCX 2 is a lot more sedate and doesn’t seem to go over 4.2-4.3.

However, are you saying that the 3900X uses 8 cores on one chiplet and 4 on the other, because to me it looks more like 6&6. That’s how Ryzen master shows it. I would think the weakest 2 cores on each chiplet are disabled.
 
Boot_Loop said:
Yes of course, the chips that can hit 4.6Ghz at least single core boost get sent off to be packaged as 3900X's. Those that can hit 4.7Ghz are siphoned off to be made into 3950X's.

Remember, as someone above stated, 3900X and 3950X are made up of two CCX's (8C CCX + 4C CCX and 8C + 8C. Technically each CCX is 4-cores or two pairs of 4-cores, but there is zero penalty with inter-CCX communication between the pairs of 4-cores on the same CCX), so need two of these chiplets instead of just one. But only one of the chiplets needs to be able to hit 4.6Ghz or 4.7Ghz.
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I think you may have misunderstood what I am asking.

If chiplets can be binned before packaging then 3900x is not in direct competition with 3950x. You will have binned chiplets with all 8 cores working that can be used for 3700X, 3800X, 3900X and 3950X and binned chiplets where 6 cores are working for the 3600, 3600X, and 3900X. In this case the 3900X can take chiplets from both bins that can hit the desired frequencies and shouldn't really be having that many issues with supply.

If the binning happens after packaging then that is when 3900X is in direct competition with 3950X binning wise.
 
NuScorpii said:
I think you may have misunderstood what I am asking.

If chiplets can be binned before packaging then 3900x is not in direct competition with 3950x. You will have binned chiplets with all 8 cores working that can be used for 3700X, 3800X, 3900X and 3950X and binned chiplets where 6 cores are working for the 3600, 3600X, and 3900X. In this case the 3900X can take chiplets from both bins that can hit the desired frequencies and shouldn't really be having that many issues with supply.

If the binning happens after packaging then that is when 3900X is in direct competition with 3950X binning wise.
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I doubt it works like that tbh. 3900X has to come from the 8 core chiplets.
 
They would have to be binned before packaging or else any chiplets that couldn't hit the speed of 3900x but were in a dual chiplet package would be wasted.
 
marms said:
They would have to be binned before packaging or else any chiplets that couldn't hit the speed of 3900x but were in a dual chiplet package would be wasted.
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"Have" to be. I agree, but checking the chiplets without packaging is very difficult especially if you are keeping to the same thermal considerations as the package. Yet if they were binning chiplets first there shouldn't be a huge shortage compared to other chips, yet here we are with no 3900Xs. All depends on their expected yields...
 
If the chips are packaged before binning there must be quite a few 8 core chips that can do 3950x speeds so where are they going? Are they being kept for a future processor not announced yet?
 
marms said:
If the chips are packaged before binning there must be quite a few 8 core chips that can do 3950x speeds so where are they going? Are they being kept for a future processor not announced yet?
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Why not in the 3800X? Base clock is much lower on the 3950X (3.5GHz v 3.8Ghz) and only one core is needed to boost higher to 4.7GHz so it stays within the same thermal limits. If you underclock a 3800X to 3.5GHz you may well be able to get one core to 4.7GHz.
 
Yes 3900X landed today, should have being 70pc, but only 60pc arrived, the courier seems to have lost 10pc.....

So 60 orders going out today, as we have 150+ back orders no spare stock I am afraid!
 
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