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双通道内存对游戏提升到底有多大：一文读懂_我的网站

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一 | 内存价格暴涨，很多想要加内存的玩家都在纠结，我们都知道双通道内存可以让游戏体验提升，那么这个提升有多少，到底值得不值得升级，下面我们就通过实测来证实一下。先简单介绍一下，内存是直接和CPU进行通信的，所以内存的速度越快，CPU就能更快地获取到所需的信息。双通道内存指的是将不同的内存布置在两个通道中，CPU可以同时读写两组内存条，理论上内存带宽直接翻倍。 SACRAMENTO, Calif. -- California officials on Thursday faulted communities in a stretch of the crop-rich San Joaquin Valley for failing to develop a plan to adequately protect groundwater in the often drought-plagued state.The state's water resources board set an April hearing to determine whether the Tulare Lake Subbasin in the heart of California's farm country should be placed on probation. It is the first time the state has made such a move, and the first step in a lengthy process that could end up requiring large farms in the area to report groundwater use and pay fees.California is starting to regulate the pumping of groundwater after years of drought and overpumping left rural residents’ wells dry and led to subsidence, or the sinking of land, in some communities. Both issues have affected the largely agricultural region, which is home to 145,000 people, and stand to worsen absent revisions to the local groundwater plan, officials said.“This is an urgent issue,” said Natalie Stork, an official at the State Water Resources Control Board. “There are urgent impacts from continued overdraft in these basins.”The state enacted a 2014 law tasking communities with forming groundwater agencies and making plans to manage the resource sustainably, starting with the most critically overdrafted basins, including the Tulare Lake Subbasin.Five groundwater agencies joined together come up with a plan for the subbasin where farmers grow cotton, almonds and pistachios. But the plan was one of six that California's Department of Water Resources deemed inadequate this year.Now, the State Water Resources Control Board will hold a hearing April 16 to decide whether to place the Tulare Lake Subbasin on probation. If it does, large pumpers would report their groundwater usage and pay fees while the local agencies draft a new plan for the basin. If they don't, the board could eventually implement its own plan.Many communities rely mainly or solely on groundwater for drinking water and farmers count on it for irrigation, especially in a drought. California muddled through a spell of dry years until a series of winter storms drenched the state and dumped massive amounts of snow in the mountains. When the snow melted, it flowed down to form the reemerging Tulare Lake, which covered vast stretches of farmland with water. California has long tended toward wet and dry periods, but scientists at University of California, San Diego’s Scripps Institution of Oceanography have said they expect climate change will lead to drier dry years and wetter wet years.。不过呢，CPU要和内存交换的数据并不是平均分配在两个通道的内存上的，所以内存带宽的翻倍并不能使相应的速度翻倍。可以看到，在DDR5 6000MHz平台下，16GB单通道内存的读取带宽为46.6GB/s，而双通道的带宽则提升到了59.5GB/s，带宽提升了接近28%。 游戏玩家更关注的问题是，CPU真的需要这么大的内存带宽来运行游戏吗？这取决于游戏引擎对CPU与GPU之间数据交换的频繁程度。帧数越高，每秒需要从内存读取的材质、模型和场景数据就越多，内存带宽的瓶颈也就越明显。我们使用AMD R7 9850X3D搭配RTX 5070平台进行实测，测试游戏包括《赛博朋克2077》，《CS2》，《古墓丽影：暗影》以及《极限竞速：地平线5》。所有游戏均为2560 x 1440分辨率，预设高画质，支持光线追踪的游戏开启光线追踪，支持DLSS的游戏开启DLSS并使用质量模式。从测试结果来看，双通道内存带来的帧数提升远没有理论性能那么大，提升幅度都在2%-3%左右，对于200帧的游戏帧数来说好像并没有那么明显。不过平均帧率只能反映游戏的整体感受，而内存带宽提升带来的另一优势是最低帧的提升。所以下面我们再看看1% Low帧的对比。在这四款游戏中，双通道对1% Low的提升幅度远大于对平均帧率的提升，提升幅度直接来到了10%以上，对于《CS2》这类FPS游戏有明显的提升，而且low帧的提升对于游戏体验来说也大有裨益。

二 | 双通道内存让CPU和内存的数据交换更加及时，CPU不需要等上一批数据传完就能开始下一批，帧间隔因此更均匀，也就使得游戏的low帧更高，给我们的感受就是卡顿感更少了。

三 | 所以结论也就很明显了，如果你玩的是注重反应速度的FPS游戏，或是为了提升竞技的技术，那么双通道内存就是必备。

四 | 而对于普通的游戏玩家来说，双通道内存对帧数的提升并不明显，没有必要单纯为了双通道而加内存。另外，对于使用核显的用户来说，双通道的意义更大，因为核显没有独立显存，直接共享系统内存，内存带宽就是显存带宽，双通道几乎是必选项而非可选项了。最后要提醒大家的是，在组建双通道内存时，插槽位置要对，有4条插槽的主板，双通道内存要隔一个内存插槽安装，虽然不同频率不同容量的内存也能组成双通道，我们还是建议频率和时序尽量一致。