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@hurricane007 amd的TR好像出了把，频率也很高。i9就算了吧，X299主板价格虚高，性价比远不如用Xeon。
上次我看到CFD界公众号里面有个对比，做的很不严谨，我是真实做过计算对比的，在公司里面有一个我做的benchMark，有机会上传到这里。i7其实效率比Xeon系列差太多了。我真不知道那篇公众号里面7700k怎么会这么强？他也没给出具体的算例和并行拆分的方法等等，感觉是不是itel给李博钱了:cheeky:
我个人还是入手了E5 2696V3,22核44线程，支持双路，打补丁后频率3.6Ghz不成问题。价格便宜，只要不到5000。性价比一路了然。计算速度也快的多。过两天把我的结果上传分享一下 -
@hurricane007 @赵一铭 单个cpu4000多元，这些cpu都是国外服务器上拆的偷的洋垃圾，所以很便宜，国外是买不到的。我测的是i7跟E5的对比，Ryzen我也不知道咋样
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兄弟们有人用过这个没有，AMD的EPYC 7601。最近才发现A厂官方竟然拿7601做CFD测试，最多的网格数量3个亿，真有钱。这个处理器有这么暴殄天物么？下图：
另外有网友用OpenFOAM做的测试，也是AMD EPYC系列的，型号略低
A quite compelling comeback for AMD in terms of CFD performance. Their new Epyc lineup delivers exactly what Intel has only increased incrementally over the past few years: memory bandwidth.
总结：牙膏厂几年一直在慢悠悠的增加内存带宽，AMD一下子就干翻！Although the AMD system in this benchmark ran slower DDR4-2133 instead of the maximum supported 2666MT/s, it beats the Intel-system even in terms of per-core performance. Using all its cores, it pulls ahead of Intel by up to 63%.
总结：提升63%！Which brings us to the costs: Epyc 7301 CPUs cost ~920€ - if they are available which is still a problem. For that kind of money all Intel has to offer are Xeon Silver with 12 cores and support for DDR4-2400. So when you are on a limited budget for a CFD workstation or need cost-efficient cluster nodes, you should consider AMD.
They are back!
AMD要回来了！！！
有人买过这个处理器没？
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