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		Enlarge	StarTech.com PEX1S552 Serial Adapter 0.45 Mbps, Internal Adapter, PCI-Express, PCI Exp ... Read more 0.45 Mbps, Internal Adapter, PCI-Express, PCI Express x1, PCI Express x2, PCI Express x4, PCI Express x8, PCI Express x16, RS-232 ... Minimize Compare Prices  |  See Product Specs		starting from $40 (11 stores) Compare Prices
		Enlarge	Comtrol (30126-4) Serial Adapter 0.9 Mbps, Internal Adapter, PCI Express x1, PCI E ... Read more 0.9 Mbps, Internal Adapter, PCI Express x1, PCI Express x2, PCI Express x4, PCI Express x8, PCI Express x12, PCI Express x16, RS-4... Minimize Compare Prices  |  See Product Specs		starting from $243 (8 stores) Compare Prices
		Enlarge	StarTech.com PEX2S5521P Serial Adapter 0.45 Mbps, Internal Adapter, PCI-Express, PCI Exp ... Read more 0.45 Mbps, Internal Adapter, PCI-Express, PCI Express x1, PCI Express x2, PCI Express x4, PCI Express x8, PCI Express x16, RS-232 ... Minimize Compare Prices  |  See Product Specs		starting from $45 (4 stores) Compare Prices

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