Unverified88% confidenceDecision RuleTime unknown
750W金牌电源搭配4070 Super和7800X3D功耗余量充足，但若未来想升级到4080或更高功耗显卡，需要同步更换电源
1
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88%
Confidence
Long-term
Relevance
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Unverified电源额定功率应为整机满载功耗的1.5-2倍留余量：搭载RTX 4070级别显卡建议650W金牌，RTX 4080/4090建议850W-1000W金牌及以上75% similarUnverified550W电源对当前配置够用但余量有限，未来若升级更高功耗显卡（如RTX 4070级别）需同步更换电源75% similarUnverified电源功率选择应按显卡TDP+150W预留，如RTX 4070Ti（285W）建议750W金牌电源，RTX 4080/4090建议850W-1000W，避免瞬时功耗触发OCP保护重启72% similarUnverified电源功率不能只看CPU+显卡额定功耗之和，需预留30%余量并选80PLUS铜牌以上；RTX40系高端卡瞬时功耗尖峰高，低质电源会触发保护关机70% similarUnverified选购流程：先算主机峰值功耗(CPU TDP+显卡功耗+外设约50-100W)→乘1.5-1.8倍定功率→按显卡等级确认ATX3.0与12VHPWR需求→按机箱定ATX/SFX规格→在此基础上按预算选金牌全模组或铜牌半模组→静音需求加选停转风扇70% similar
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