面对 DDR5 内存价格高企的现状，不少用户考虑先行购入单根内存、后续再升级扩容的方案。Tom's Hardware 的实测数据显示，这一策略的可行性高于预期。[1]单根 DDR5 内存在游戏中的性能损失远小于业界普遍预期，Intel 平台的性能下降幅度约为 8% 至 10%，而 AMD R7 9800X3D 平台的平均帧率损失仅为 2.8%。[1]
在具体游戏测试中，性能表现存在明显差异。R7 9800X3D 在《星空》中使用单根内存配置的平均帧率仅下降 1.6%，而酷睿 i5-14600K 搭配单根 DDR5 的性能甚至比双通道 DDR4 配置高出约 6.8%。[1]不过在某些游戏中性能损失幅度较大，例如 R5 7600X 在《毁灭战士：黑暗时代》中的性能下降达 17.3%。[1]这些差异表明，单根高频 DDR5 在部分场景下可以媲美甚至超越双通道 DDR4 的表现。
DDR5 内存架构相较前代产品有所改进，将传统单通道拆分为两个独立的 32-bit 子通道，这在一定程度上缓解了单条内存的性能瓶颈。[1]
As DDR5 memory prices remain elevated, consumers are reconsidering their upgrade strategies by purchasing a single module now with plans to expand later. Tom's Hardware conducted performance testing that reveals single-root DDR5 configurations incur far less gaming performance penalty than commonly expected [1].
The test results varied significantly across different processors. On Intel platforms, single DDR5 modules resulted in performance drops of approximately 8 to 10 percent [1]. AMD's R7 9800X3D demonstrated markedly better resilience, with average frame rates declining by only 2.8 percent [1]. In the game Starfield, the R7 9800X3D with a single memory module experienced just a 1.6 percent average frame rate reduction [1]. The Core i5-14600K with a single DDR5 configuration achieved approximately 6.8 percent higher performance compared to dual-channel DDR4 setups [1].
Performance degradation proved less uniform across all titles tested. The R5 7600X encountered a 17.3 percent performance decline in Doom: The Dark Ages when running a single memory module [1]. DDR5's architecture differs from previous generations in that it divides what was traditionally a single channel into two independent 32-bit subchannels [1].
