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List of compatible models includes: K12 Only Z620 ZC3.7 128G 16g WS, NVIDIA Quadro fx1300 128MB PCI-E,xw4200, NVIDIA Quadro K4000M GFX, Promo Z620 ZC2.5 1TB 8G W8.1P64 DG W7, Z620 Base Model Workstation, Z620 Workstation, Z620 ZC2.0 180G 16g W7 Pro 64bt WS, Z620 ZC2.0 500G 4G W7 Ult Ed64 WS, Z620 ZC2.0 500G 8G W7 Pro 64bt WS, Z620 ZC2.5 500G 8G W7 Pro 64bt WS, Z620 ZC2.6 1TB 32G W7 Pro 64bt WS, Z620 ZC3.5 128G 16G W7 Pro 64bt WS, Z620 ZC3.7 256G 16G W7 Pro 64bt WS, Z820 Workstation, Z820 ZC2.4 500G 128G W7 Pro 64bt WS, Z820 ZC2.4 500G 64G W7 Pro 64bt WS, Z820 ZC2.6 1TB 32G W7 Pro 64bt WS, Z820 ZC2.6 256G 64G W7 Pro 64bt WS, Z820 ZC2.6 512G 192G W7 Pro 64bt WS, Z820 ZC2.7 500G 128G W7 Pro 64bt WS, Z820 ZC3.0 512G 128G W7 Pro 64bt WS, Z820 ZC3.3 256G 192G W7 Pro 64bt WS, Z820 ZC3.3 256G 64G W7 Pro 64bt WS, Z820 ZC3.4 480G 32G W7 Pro 64bt WS, Z820 ZC3.4 512G 128G W7 Pro 64bt WS