PCIE Add-in Card 相關筆記

Form Factor

Card Length (DIM M): -Full Length: 312mm -3/4 Length: 254mm -Half Length: 167.65mm

Card Height (from gold finger to top edge): -Standard Height: 111.28mm -Low Profile: 68.90mm

Component height restrict: -Primary side Single slot: 14.47mm Dual slot: 34.80mm Triple slot: 55.12mm -Secondary side All: 2.47mm

Current Load

• 3.3V 最多走到 3A
• 12V 最多走到 5.5A
• 一支PCIE connector 最多走到 3.3V x 3A +12V x 5.5A = 75.9 - 75W
• 150W: 75W + 12V x 6.25A (by 2×3 connector)
• 225W: 75W + 12V x 12.5A (by 2×4 connector)
• 300W: 75W + 12V x (6.25A+12.5A) (2×3 connector+ 2×4 connector)

Thermal Management

• 卡類分成一般卡與Adpter card，以下只針對一般卡
• 如果有自帶風扇，規格會以CFM標 (體積流量)，沒有自帶風扇則以LFM標 (流速)，Adapt card另外以AFI標 (Airflow impedance)
• 225W/300W的ambient temperature 建議在45C以下，其他則建議55C以下
• CFM 將ambient temperature定義為風扇進氣平均溫，LFM則定義為離卡1″ (25mm)遠處之平均溫
• 150W以上的卡都建議自帶風扇，直接將熱排出系統，不要共用系統風流