PCIe Gen 5 是否意味著電源符合 ATX3.0?

為您的 PCIe Gen 5 顯卡選擇合適的電源。

2019年,PCI-SIG協會宣佈了 PCIe Gen 5 的新介面 (12VHPWR) 變化。因此新一代顯示卡連介面必須根據新的PCIe Gen 5 介面設計。 其中重要的一項設計為放寬+12V電路負載波動範圍的限制 (從±5%到+5 ~ -7%)。 簡而言之,ATX3.0電源規範必須包括PCIe Gen 5介面設計,但一些只是帶有PCIe Gen 5接頭的電源,卻並不是真的滿足ATX3.0電源規範的要求。讓我們看看ATX3.0標準需要什麼電源滿足哪些要求?

CPU峰值電流增加

PSU 12V2 Capability Recommendations
  PSDG V1.43PSDG V2.0
Processor TDPContinuous CurrentPeak CurrentPeak Current
165W37.5A40A40A
125W26A34A39A
65W23A30A34A
35W13A16.5A19A

放寬負載調整

放寬+12V電路負載調整率的限制(從 ±5% 到 +5 ~ -7%)

 PSDG V1.43PSDG V2.0
OutputRangeMinRangeMin
+12V1DC±5%+11.40+5% / -7%+11.20
+12V2DC±5%+11.40+5% / -7%+11.20

最大電壓變化率

特別是連接顯卡的+12V輸出從原來的100%激增到300%

 PSDG V1.43PSDG V2.0
OutputMaximum Step Size
(% of Rated Output Amps)
Maximum Step Size
(% of Rated Output Amps)
+12V1DC40% (Required)
70% (Recommended)
40% (Required)
70% (Recommended)
+12V2DC85%85% of CPU supported in Intel PSDG Table 2-12
+12V3/480% (Recommended)Steps from 100% > 300%
30% > 100%
+5VDC30%30%
+3.3VDC30%30%

Power-on時間

最大電壓變化率

 PSDG V1.43PSDG V2.0
DescriptionRequiredRequired
Power-on time< 500 ms< 200 ms
PWR_OK delay100-500 ms100 ms – 250ms

超載瞬間輸出

增加了對相容電源平臺的高功率峰值的耐受性。對於額定功率大於450W的電源而言,在10%負載下,瞬間峰值功耗要能達到提高至額定功率的200%,持續100μs;額定功率低於450W的,瞬間峰值功耗要達到150%,持續100μs。

Power Excursion % of PSU Rated Size PSU ≤ 450 Watts & PSUs without 12VHPWR ConnectorPower Excursion % of PSU Rated SizePSU > 450 Watts & 12VHPWR Connector presentTime for Power ExcursionTesting Duty Cycle
100%100%Infinite--
110%120%100 ms50%
135%160%10 ms25%
145%180%1 ms20%
150%200%100 µs10%

新型 12VHPWR 接頭

PCIe Gen 5(12+4)接頭和 12+4 pin線材

  • 所有12個電源觸點的額定電流高達9.2A
  • 完全獨立的端子
  • 12VHPWR 接頭16AWG線材 (600W)
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