Does this support full throughput for all 4 links simultaneously, i.e. 40gbps tx and 40gbps rx?

The maximum throughput of the PEX10GSFP4I is limited by the bus interface. PCI Express Gen 1.0 max throughput is 2Gbps per lane. PCI Express Gen 2.0 max throughput is 4Gbps per lane. PCI Express Gen 3.0 max throughput is 8Gbps per lane. The available bandwidth (64Gbps) is shared equally between the four ports. Atha, StarTech.com Support

Is the open sfp style sfp+? the title says sfp+, but that style isn't specific. there is a difference between them so it should be specified somewhere

The PEX10GSFP4I has 4 open SFP+ ports capable of 10Gbps speeds. Stefan, StarTech.com Support

Will cisco sfp-10gb-sr sfp's work in this nic?

Yes, we would expect those Cisco SFP modules to work. We’ve specifically tested the card with our version of a very similar SFP-10G-SR module (SFP10GSRST) Curtis, StarTech.com support

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10G Network Card - 2X 10G Open SFP+ Multimode LC Fiber Connector - Intel 82599 Chip - Gigabit Ethernet Card (PEX20000SFPI)

Product ID: 19767387

Details

Brand
StarTech.com
Color
Black
Compatible Devices
Desktop
Compatible Operating System Family
Linux Windows
Data Link Protocol
IEEE 802.3ad
Data Transfer Rate
20 Gigabits

⚡20Gbps full-duplex speed

🔌Dual 10G SFP+ fiber ports

🧠Intel 82599 chipset with virtualization

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Description

🚀 Upgrade to lightning-fast 10G fiber — because your network deserves the best!

DUAL OPEN SFP SLOTS - Flexible fiber connectivity tailored for high-performance servers and workstations.
PLUG PLAY VERSATILITY - PCIe x8 interface ensures easy integration with most modern systems and OS compatibility.
BLAZING 20 GBPS BANDWIDTH - Double the speed with full-duplex 10Gbps per port for seamless data flow.
FUTURE PROOF YOUR NETWORK - Supports PXE boot and IEEE standards for scalable, enterprise-grade networking.
INTEL POWERED RELIABILITY - Powered by the trusted Intel 82599 chipset with virtualization tech for optimized network traffic.

The StarTech.com 10G Network Card (PEX20000SFPI) delivers dual 10GbE SFP+ fiber ports with full-duplex speeds up to 20Gbps per port, powered by the Intel 82599 chipset featuring virtualization technology. Designed for high-bandwidth, data-intensive environments, it fits PCIe x8 slots and supports PXE boot and IEEE networking standards, making it a cost-effective, reliable upgrade for servers and workstations demanding top-tier network performance.

Specifications

ASIN	B01273K570
Best Sellers Rank	#229 in Internal Computer Networking Cards
Brand	StarTech.com
Built-In Media	1 - Low-profile bracket, 1 - PCIe 10GBase Fiber Card, 1 - Quick install guide
Color	Black
Compatible Devices	Desktop
Compatible Operating System Family	Linux, Windows
Customer Reviews	4.0 4.0 out of 5 stars (10)
Data Link Protocol	IEEE 802.3ad (Link Aggregation) IEEE 802.3x (2005 Flow Control Support) IEEE 802.1Q (VLAN tagging)
Data Transfer Rate	20 Gigabits Per Second
External Testing Certification	CE, FCC
Global Trade Identification Number	00065030860604
Hardware Interface	PCI Express x8
Item Dimensions L x W x H	5.3"L x 0.7"W x 4.7"H
Item Type Name	Startech.Com PEX20000SFPI 10G Fiber Network Card with Open SFP PCIe, Intel Adapter PCI Express 2.0, Black
Item Weight	0.39 Pounds
Item Width	5.1 Inches
Manufacturer	Startech.com
Mfr Part Number	PEX20000SFPI
Minimum Required Operating System Version	Windows 7
Model Number	PEX20000SFPI
UPC	065030860604
Unit Count	1.0 Count
Warranty Description	2 year warranty

Reviews

H**F

Five Stars

very very good

6.06.2016

A**Y

Four Stars

Works out of the box on FreeBSD as an X520-SR2 clone without the hassle of the intel-only transceivers

6.01.2016

A**H

Works great in my Dell R810 which I used for my ESXi 6.7 server. I bought the transcievers from fs.com (Intelt type).

16.11.2021

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