qsfp+

I want to directly connect two computers using two Intel XL710-QDA2 40Gbps PCIe 3.0 x8 cards. However, the only slot I have available on my MSI x670-P Wi-Fi motherboard is a PCIe 4.0 x 2 slot (the physical slot size is x16). See "PCI_E4" in the diagram below: If the card I would put in the...

[EDIT] After 2+ more hours I think I have found an answer. Nope. Every article I see talks about compatibility of using older 40Gbit QSFP+ optics in 100Gbit QSFP28 switches. Does the opposite work? I doubt it, but it would be good to know. I'm on a shoestring budget and I'm encountering...

I just recently purchased the MikroTik CRS354-48G-4S+2Q+RM switch to expand my server's networking capabilities. However I have seem to run into compatibility issues. The switch wiki says it only supports transceivers/cables made by MikroTik, I already bought cables from FS.com and I can't find...

Hi all! I'm attempting to use these apparently coveted (and cheap) HP/Mellanox cards for a switchless, high-speed homelab configuration. I thought I knew what I was getting myself into when I ordered everything... however, I'm just now realizing after purchasing the equipment that it may not...

Hi, I am wondering if I buy a QSFP+ to SFP+ Breakout cable, like one of these: 40G QSFP+ Cables, QSFP+ to 4 SFP+ Breakout Copper Cables Do I need to plug in all 4 SFP+ cables or can I just use one or as many as I like? I am asking since I have a QSFP+ switch (Mellanox) - and a Netgear switch...

I have a few ConnectX-3 cards with dual QSFP+ ports on each and I'd like to have their capacity available for a local LAN party (36 total 1G ports required) without breaking the bank. The problem is the QSFP+ enabled switches common in the US are either much more expensive in the EU or just...

Hello all, I was thinking, for my living room where I have quite a few servers running (silent !), to do a custom 10gbe IPoIB setup. In my lab room I could use the Voltaire 4036 (non-E version unfortunately) which I still need to find a way to silence. It's way too noisy even for the server...

What's the functional difference? The reason I ask is because I have an Arista 7050QX-32-S (24x QSFP+ 4x10G-capable-ports and 8 QSFP+ 40G-only-ports) and recently I picked up some Arista 40G-UNIV transceivers expecting, perhaps niavely, for them to functionally be an SMF/MMF compatable version...