SteamOS下8GB显存GPU性能受限测试显示明显瓶颈

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科技媒体Ars Technica于12月2日发布测试报告，指出在当前SteamOS测试版系统中，配备8GB显存的GPU（如AMD RX 7600）相比Windows 11系统，游戏性能表现显著下降。Valve即将推出的Steam Machine主机定位中端市场，旨在提供流畅的1080p至1440p游戏体验，其计划采用8GB显存GPU引发业界关注。当前游戏环境下，8GB显存已逐渐成为AMD ...

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7060/9060及NVIDIA GeForce RTX 4060/5060等中端显卡的性能限制因素。Ars Technica使用与Steam Machine相近配置进行对比测试，平台搭载AMD Ryzen 7 7700X处理器、ASRock B650 Pro RS主板、32GB DDR5-6000内存、1TB Western Digital SN850固态硬盘、EVGA Supernova 850 P6电源，操作系统分别为Windows 11 25H2和SteamOS 3.9（Main channel, build 20251124.1000），驱动为Windows下AMD Adrenalin 25.11.1与SteamOS下Video Driver 4.6（Mesa 25.2.0）。测试选用AMD Radeon RX 7600（8GB）与RX 7600 XT（16GB）进行跨系统性能对比，结果显示，在运行《赛博朋克 2077》开启光追和《Returnal》等高显存需求游戏时，SteamOS下的8GB显存版本性能远低于16GB版本，出现从可玩到无法正常运行的严重性能骤降。相同场景下，Windows 11系统的性能差距则相对较小。Valve软件开发者Pierre-Loup Griffais承认SteamOS在显存管理方面存在缺陷，表示团队正集中解决该问题。当游戏超出显存容量时，数据将溢出至系统内存并通过PCIe总线交换，导致性能急剧下滑，这一机制与测试中出现的“幻灯片”式卡顿现象一致。Griffais确认相关修复补丁正在开发中，即将合并至SteamOS主测试分支。目前Valve官方支持设备如Steam Deck采用集成显卡架构，共享系统内存，不受限于固定显存容量。Steam 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SteamOS下8GB显存GPU性能受限 测试显示明显瓶颈

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SteamOS下8GB显存GPU性能受限测试显示明显瓶颈