Will there be a bottleneck with 16GB RAM and 32 threads CPU?

And if so how much of a bottleneck? Is it worth the money to upgrade to 48GB? I have 8x2GB in the HP Z820, but was thinking of getting more RAM from Mr Memory that is compatible with the Z820 for much cheaper than what HP are selling HP branded ram for. I was looking at 8x4GB for around £344 to make 48GB. Is it risky going unbranded or do people do this a lot?
Thanks
Costa

HP can list that it's an option that doesn't mean it's recommended or the best way to do it without having issues. Since the ram controller was moved to the CPU, trying to run asynchronous timings on system boards with Quad channel is asking for problems. If you call the ram manufacturers they wont recommend it with their ram and likely wont support it if they have any clue. Due to how the ram market is so volatile and dimm modules change ram chips from 1 production run to the next , you cant even run 2 different sets of the same model of ram with different manufacturer chips on the dimms. The ram companies will tell you that you need to change them out. I have been dealing with all of the ram variables since tri-channel started on the I7 Gen 1 platform and it only gets more complex with Quad channel. We have our ram custom made just to ensure we have the same manufacturer chips on our dimms regardless of the production along with the same stepping of construction until the wafer has to change. There are far more timings than CAS rating and the most important to compatibility are the sub timings which the manufacturer does not list. HP also can say they only want Grade 1A ram modules for their dimms which is why they are more expensive while that ram manufacturer will use other grades for their own branded ram. Those modules will not work together most of the time if at all. Do what you will but dont say you were not warned. Much of this information is not available to anyone unless they talk to the Engineers over in TW that deal with the dram chip fabs.
Eric
ADK

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Will there be a bottleneck with 16GB RAM and 32 threads CPU?

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