Based on our own research - The REASON is official IEEE 802.3az standard for EEE is the main problem, because it is ALSO missing from the physical chip, and CANNOT be added by just NVM firmware, but EEE is unfortunately REQUIRED to be in fully official IEEE 802.3bz compliance (this EEE standard is a part of the official mGig standard). I ended up having to connect my server and PC directly with the ASUS XG-C100C and StarTech X550-T2, so the performance is capped by whichever is the slowest card. You might choose to increase the number of Transmit Descriptors if you notice a problem with transmit performance. Increasing the number of Transmit Descriptors can enhance transmit performance. But, Transmit Descriptors consume system memory. If transmit performance is not an issue, use the default setting. Enables Receive Side Scaling (RSS). RSS balances receive traffic across multiple CPUs or CPU cores. This setting has no effect if your system has only one processing unit. Notes You must enable RSS for Intel® I/O Acceleration Technology to function under Microsoft* Windows Server* 2003.

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Example 2:If you have a 64-bit PCI-X adapter, put in a 133 MHz (266 or 533 if available) 64-bit PCI-X slot. Maximizing File Transfer Performance Using 10Gb Ethernet and Virtualization (Linux* and VMware vSphere*)

As I have limited access to different cards and hardware set ups, it has been difficult to make a comparison of performance. However, I found two posts that show some comparisons Waiver. No waiver of any provision of this Agreement will be valid unless in a writing signed by an authorized representative of the waiving party that specifies the waived provision. That signed waiver will not constitute a waiver of any other provision. A party’s failure or delay in enforcing any provision will not operate as a waiver. Preliminary-Draft Nbase-T upgrade to official IEEE 802.3bz MGIG firmware, as confirmed above by Intel, DOES NOT EXIST in full compliance, and, The biggest issue with testing the performance of a 10 Gigabit Ethernet Card is matching up all the hardware to handle the speeds. While I have reviewed the Xyxel 10GbE switch and 10GbE copper transceivers, I struggled to get full 10-gig speeds. I wrestled with the idea setting up 10gig without a switch and ran into nothing but problems. Since you do have a switch, you should be ok using that.

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Try to install the adapter in a slot on a bus by itself. If add-in cards share a bus, they compete for bus bandwidth.Some adapters configured to use Virtual Machine Queues (VMQ) don't support RSS. For these adapters, VMQ takes precedence over RSS. RSS is disabled. Entire Agreement. Except for any non-disclosure agreement between you and Intel, this Agreement constitutes the entire agreement, and supersedes all prior agreements, between Intel and You concerning its subject matter.

I'm using a 24 port 1gb/4port 10gb switch from Fiberstore and it has worked great so far. ( https://www.fs.com/products/72944.html) When this feature is enabled, the network adapter dynamically adapts to network traffic conditions. The default setting works best for most computers and networks. Inrare situations, youget better performance by changing this setting.INDEMNITY. You will indemnify, defend, and hold Intel harmless from any allegation against Intel arising in connection with Your use of the Materials and You will pay all of Intel’s losses, liabilities, and costs (including attorneys’ fees) arising from the allegation. Your Products” means products developed or to be developed by or for You that include an Intel Component executing the Materials. Open Source Licenses. The Materials may include software subject to an open source license, including licenses recognized by the Open Source Initiative ( http://www.opensource.org). Nothing in this Agreement limits any rights under, or grants rights that supersede, the terms of any applicable open source software license.