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AI服务器快热炸了,液冷和母线才是真·隐形大腿!

AI服务器快热炸了,液冷和母线才是真·隐形大腿!

先问一个问题:你家里电脑打游戏烫得能煎蛋的时候,你是加风扇,还是直接上水冷?

AI服务器现在也面临一样的尴尬——只不过它不是煎蛋,它快能炼钢了。


一、芯片热到冒烟,风冷已经“吹不动了”

这两年AI大模型疯了,训练完还要推理,推理完还要多模态,算力需求跟吃了兴奋剂一样往上蹿。

结果是什么?芯片功率飙到700W甚至1000W,有些变态的热流密度超过120W/cm²——什么概念?差不多每平方厘米塞进去一个电烙铁。

英伟达那个NVL72,一个柜子功率超过132kW。132kW是多少?家里冬天取暖用的油汀大概2kW,这一个机柜顶66个电暖器,搁机房里简直就是一座小火山。这还不算完,2027年下半年可能要出600kW的单柜,到那时候风冷已经不是“不够用”的问题了,是你拿电风扇吹炼钢炉,吹出来的风都是烫的。

所以液冷来了。 液体的比热容比空气大得多,相当于你不用嘴吹汤了,直接把汤倒进冰水里——降温效果天差地别。

政策也在后面推:国家要求到2025年底,数据中心平均PUE降到1.5以下,枢纽节点更是要压到1.2以内。翻译成人话就是——电费太贵了,你不省着用就罚你。

所以液冷的渗透率,预估从2024年的14%直接跳到2025年的33%,以后还得继续涨。风冷转液冷,已经不是选择题,是必答题。


二、电怎么送进去?母线才是真功夫

好,散热的问题液冷接了。那电呢?

一个柜子动不动上百kW,电流大得离谱。以前那种低压12V或者50V的供电架构,电流能干到20000A——2万安培是什么概念?你得用跟胳膊一样粗的铜排来送电,又贵又重又难装,工人师傅看了想辞职。

所以现在搞到第三代了:直接用800V高压直流,电流唰地降到1250A,铜排瘦身成功,大家都开心。

供电的线路也跟着进化了三代:

  • 第一代:传统线束,一堆乱七八糟的电线,跟老家电视柜后面那团蜘蛛网一样。没法盲插,维护全靠老师傅的手艺,电流一大直接歇菜。

  • 第二代:整合成PDU,稍微体面了一点,但还是不能盲插,高载流也扛不住。

  • 第三代机架母线,2到3根,直接替代PDU。装在算力柜中间,抽屉推进去就自动接上了——盲插,就跟充电宝插手机一样简单。省空间、好维护、大电流随便扛。

而且母线自己也从“风冷平排”升级到了“液冷台阶排”。台阶排比平排窄,盲插更丝滑,还加了地线和防触电模块,安全性拉满。

总结一下这场供电革命:电压从低压变高压,线路从线束变母线,散热从风冷变液冷。三个字——全换了。


三、谁能干这个活?能干的真不多

机架母线这玩意儿,听起来就是铜排,实际上加工难度大、认证门槛高,国内真能供货的没几家。这个赛道窄但深,属于“看着不起眼,进来才知道水多深”的类型。

① 金田股份——铜排界“隐形卷王”

2025年公司芯片半导体领域铜材卖了4.1万吨,同比增长21%。其中算力散热这块干了1.41万吨,同比直接爆了55%。

现在手里有芯片半导体铜排产能3.5万吨,机架母线铜排产能1.5万吨,还在广东搞了个液冷科技子公司,又跑去越南投了“年产3万吨液冷散热及机架母线用高精密铜排”项目。

一句话:产能最大、增速最快、海外也在布局,是这条赛道里最猛的一个。

② 电工合金——老牌技术派

做铜母线做了很多年,技术中心是省级的,还设了博士后创新实践中心。产品性能比国家和行业标准高出一截,客户名单拿出来能吓死人:施耐德、ABB、西门子、GE……全是国际电气巨头。

一句话:技术底蕴深,客户全是顶级,定制化能力突出。


总结下

AI服务器现在最大的矛盾就是:算力太猛,散热和供电都跟不上了。

  • 散热:风冷退场,液冷上位。

  • 供电:低压线束退场,高压母线上位。

  • 机会:谁能做液冷机架母线,谁就是算力基建的“卖铲人”。

这个逻辑跟当初挖金矿一样——淘金的不一定赚钱,卖铲子的稳稳吃肉。

液冷机架母线,就是AI算力时代的那把新铲子。现在能造这把铲子的,国内没几家,金田和电工算是走在最前面的。

风险提示:(全文完,纯属茶余饭后闲聊,不构成任何投资建议。别拿这个去跟老婆申请加仓,亏了我也赔不起呀。)

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  1. CONNECT:[ UseTime:0.000502s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000594s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000558s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.021241s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000731s ]
  6. SELECT * FROM `set` [ RunTime:0.000204s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000578s ]
  8. SELECT * FROM `article` WHERE `id` = 642700 LIMIT 1 [ RunTime:0.000416s ]
  9. UPDATE `article` SET `lasttime` = 1779234110 WHERE `id` = 642700 [ RunTime:0.005939s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000237s ]
  11. SELECT * FROM `article` WHERE `id` < 642700 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000462s ]
  12. SELECT * FROM `article` WHERE `id` > 642700 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000366s ]
  13. SELECT * FROM `article` WHERE `id` < 642700 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003019s ]
  14. SELECT * FROM `article` WHERE `id` < 642700 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000724s ]
  15. SELECT * FROM `article` WHERE `id` < 642700 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000723s ]
0.115480s