IBM System x3300 M4 Product Manual page 26

The integrated Ethernet controller has the following Stateless offload and performance features:
TCP/UDP, IPv4 checksum offloads (Rx/ Tx/Large-send); extended Tx descriptors
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IPv6 support for IP/TCP and IP/UDP receive checksum offload
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Tx TCP segmentation offload (IPv4, IPv6)
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Transmit Segmentation Offloading (TSO)
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Interrupt throttling control
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Legacy and Message Signal Interrupt (MSI)
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Message Signal Interrupt Extension (MSI-X)
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Receive Side Scaling (RSS) for Windows
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Scalable I/O for Linux environments (IPv4, IPv6, TCP/UDP)
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Support for packets up to 9.5 KB (jumbo frames)
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IBM System x3300 M4 26