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ASRock B650M PG Riptide WiFi 亲测可以，插的两根 Micron 32G DDR5-4800 ECC UDIMM (MTC20C2085S1EC48BA1)，7900X. ASRock 的 AM5/AM4 主板似乎普遍有 side-band ECC 布线

```
# dmidecode -t memory
..
Handle 0x0033, DMI type 17, 92 bytes
Memory Device
Array Handle: 0x002E
Error Information Handle: 0x0032
Total Width: 72 bits
Data Width: 64 bits
Size: 32 GB
Form Factor: DIMM
Set: None
Locator: DIMM 1
Bank Locator: P0 CHANNEL A
Type: <OUT OF SPEC>
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 4800 MT/s
Manufacturer: Micron Technology
Serial Number:
Asset Tag: Not Specified
Part Number: MTC20C2085S1EC48BA1
Rank: 2
Configured Memory Speed: 4800 MT/s
Minimum Voltage: 1.1 V
Maximum Voltage: 1.1 V
Configured Voltage: 1.1 V
Memory Technology: DRAM
Memory Operating Mode Capability: Volatile memory
Firmware Version: Unknown
Module Manufacturer ID: Bank 1, Hex 0x2C
Module Product ID: Unknown
Memory Subsystem Controller Manufacturer ID: Unknown
Memory Subsystem Controller Product ID: Unknown
Non-Volatile Size: None
Volatile Size: 32 GB
Cache Size: None
Logical Size: None
..
```

362 天前

回复了 RatioPattern 创建的主题 › 问与答 › 有没有办法在 windows 上看实时内存吞吐量？

Intel CPU 试试 https://github.com/intel/pcm

https://raw.githubusercontent.com/wiki/opcm/pcm/pcm-memory.x.JPG

2023-04-03 14:55:52 +08:00

回复了 youmee 创建的主题 › 问与答 › 512G 的空硬盘和 1TB 的空硬盘和 1TB 装满数据的硬盘重量会有差异吗

> In electronic storage: Adding information to RAM, SSDs, flash memory, etc. — that is, storing a 1, instead of a 0 — requires storing an electric charge. Each electron has a very small weight (something like 9.10938215 × 10−31 kg), so adding electrons does mean adding a tiny amount of weight.

https://langa.com/?p=3247

2023-03-29 11:35:26 +08:00

回复了 Cineray 创建的主题 › 程序员 › 现在的 Z790 能不能上 4*32G 高频内存？

13 代 4x32GB 6000 CL30 能是能开机但是大概率还是不稳定，6000 MT/s 跑 memtest86 出错：

https://reddit.com/comments/114tqz3/_/j9a3glf/

2023-03-20 19:47:10 +08:00

回复了 Danswerme 创建的主题 › 问与答 › 求推荐 x86 小主机以及虚拟化系统

N5105 亲测可以 32GB

https://i.imgur.com/CiukNmk.png

2023-03-03 04:47:28 +08:00

回复了 nigga 创建的主题 › 路由器 › 什么电脑网卡现在能支持协商 4800Mbps？

AX210 理论极限只有 2400 Mbps (2x2 MIMO, 160 MHz channel)

https://ark.intel.com/content/www/us/en/ark/products/204836/intel-wifi-6e-ax210-gig.html

AX411 支持 2.4GHz + 5/6GHz 双连接，合起来也只有理论 3000 Mbps

https://ark.intel.com/content/www/us/en/ark/products/217242/intel-wifi-6e-ax411-gig.html

目前不存在单张消费级 4x4 无线网卡，有的话可以 4800 Mbps. 年底出 Wi-Fi 7 了说不定会有

客服说的 4800 Mbps 应该是路由器多组天线加起来的速率，不是单个客户端能达到的速率

追求速度+稳定+双工的话老老实实上 10G 有线组网

2023-03-03 04:05:33 +08:00

回复了 wps353 创建的主题 › macOS › 为什么我从 10.15.7 升级到 12.6.2，但是浏览器的 UA 还是显示 10.15.7 呢？

@wps353 是说测试发现 UA string 改 11 后一堆网页无法正常加载。略微提升隐私是副产品

2023-03-02 11:10:16 +08:00

回复了 wps353 创建的主题 › macOS › 为什么我从 10.15.7 升级到 12.6.2，但是浏览器的 UA 还是显示 10.15.7 呢？

> Mozilla's Firefox team and Apple's Safari team have encountered a long tail of broken web content when the user agent string reports "Mac OS X 11_0_0" - basically, any macOS major version greater than 10. Per http://crbug.com/1175225 , both browsers have capped the reported macOS version to 10_15_7 to both work around this, and also slightly increase user privacy.

https://chromestatus.com/feature/5452592194781184

2023-01-29 20:29:08 +08:00

回复了 absinthe 创建的主题 › macOS › macOS 13.2 为什么不支持 144Hz HDR 了？

和显示器型号有关，27GP950 144 Hz HDR 可以正常开启

https://i.imgur.com/kWhFeVO.png

VRR 48-144 Hz 开 HDR 也无问题..

https://i.imgur.com/5Ri6AMr.png

Feedback Assistant 走起 https://developer.apple.com/bug-reporting/

2023-01-28 06:25:26 +08:00

回复了 KOUKI 创建的主题 › macOS › 升级 MacOS 13.2 弹出“未能个性化软件更新”，请问各位有没有遇到的，又是怎么处理的？

/t/910635

2023-01-08 00:01:26 +08:00

回复了 BaiLinfeng 创建的主题 › Apple › 现在 iPhone 无法关闭双重验证了吗

> 如果你的 Apple ID 已启用双重认证，则无法将双重认证关闭。如果你是无意中更新为双重认证，则可以在注册后两周内将双重认证关闭。如果关闭双重认证，你帐户的安全性将会降低，并且你无法使用那些需要更高级别安全性的功能。

https://support.apple.com/zh-cn/HT204915

2022-11-01 12:02:40 +08:00

回复了 mtdhllf 创建的主题 › 路由器 › 求教 UniFi UDM-SE 相关的问题

看了一下，WAN1 和 WAN2 口都可以 PPPoE:

https://i.imgur.com/wZxkGT2.png

2022-10-19 16:21:28 +08:00

回复了 hanksun 创建的主题 › 宽带症候群 › 在加拿大使用 Google Fi 的朋友能否分享一下体验？

> Google Fi 能否在加拿大长期使用？

不能，长期在非美国地区会被警告+停用。例： https://reddit.com/x90snr

Per ToS: https://fi.google.com/about/tos/

> The Services are offered only to residents of the United States. The Services must be primarily used in the United States (territories not included) and are not intended for extended international use. Further, the Services are designed for use predominantly within our network. If your usage outside our network is excessive, abnormally high, or cause us to incur too much cost, we may, at our option and sole discretion, suspend your Google Fi account, terminate your service, or limit your use of roaming.

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