RAXE500 cannot get speeds over 1G even though I have 1.2G Internet

You're kind of stuck. 

Reason I say that is the only 2.5g device you have is the killer adapter.

Its reading 2.5g connected to the cm2000 but not when connected to the RAXE? (your photo doesn't differentiate)

so is it an issue with the RAXE or the adapter not negotiating properly. 

Are you using a cat 6 cable between the adapter and the router? 

Possibly have any other device you could test the 2.5g port on the router with? 

If you have the cm2000 connected to the raxe500's 2.5g port are you able to test a 2 seperate hardwired devices to see if you hit >1gig speeds? (test at same time on a site that can support >1gig speeds. Most can't. Xfinity's can)

(again, the 1+1 lag won't work with different adapters in my experience)

Correct, it reads 2.5G when connected directly to CM2000 and I get the 1.2G speeds. When connected to the RAXE500 it only sees 1G and only hits 1G limited speeds. I'm using cat 7 cables. I don't have any other devices with a type C USB port on them to test. All of my other devices only have 1G ports so I don't see how they can break over 1G even with the RAXE500 set at 2.5G.

AX210 is a problem child adapter. The 6E isn't working properly so its a bit oversold. 

Should be able to hit >1gig with both it and the AX200 but with any distance, it drops significantly. 

Are you needing the extra 0.2gig for something? 

Unless you're transferring massive files, you're not going to see much benefit to it as most online servers (gaming, downloading) rarely will saturate a gigabit line. I've got the 1.2gig from comcast and didn't notice the slightest difference in my activities going from 1.0 to 1.2gig. The only time I see it is if I'm speedtesting and even then, only on certain servers. 

Yes, I tried the CM1200 using LCAP. Used 2 Cat 7 Cables from CM1200 to the RAXE500. Ran Cable from ports 1-2 on CM1200 to Lan Port on RAXE500 and Port 1. Setting on both the CM1200 and RAXE500 both said LACP is active. Both Leds on CM1200 were blinking green showing they were both active. I tested both the built-in Realtek Lan and the Killer E3100 USB-C 3.1 to RJ-45 2.5Gbps Ethernet Adapter separately in this LACP mode, Both showed 1G speeds only. 

So you are talking about this adapter:

3000Mbps WiFi 6E Intel AX210 Bluetooth 5.2 M.2 2230 Key E WiFi 6 Card 2.4G/5Ghz/6Ghz With IPEX4 Antennas Wireless AX210NGW 802.11ac/ax WiFi Adapter, Support Windows 10 Linux For Laptop Desktop PC - Newegg.com

My Laptop sets within 6ft of my RAXE500 and Modem. As far as feeling the speed, I'm sure in the real world not much to be felt there. Comcast charges so much you just want to get all you can possibly get from what they give even if its mostly seen on speed test. I would need to confirm the  AX210 is compatible with my Laptop. I would also have to hope this combonation including on using Wifi as my main connection to be consistent and reliable. Even though its called a Gaming Laptop, for me its mostly a high end work Laptop.

I tested the RAXE500 with my brand new Intel AX210 Wi-Fi 6G, so this is also my first test for the Intel AX210. Here are the issues I had with this. I have Windows 10 21H1 Pro. I first tried the driver Netgear gave me access to Version (22.45.1.1). After it did not work, I noticed the Intel Update Utility found new drivers for the Wi-Fi and Bluetooth. They were the same version but I let Intel reinstall them anyways. The Intel Status shows 2.4GBPS which is what should be seen at the Intel AX210 adaptor. The below issues stayed the same.

1. Could not connect at all with the RAXE500 being set to WPA3 Personal. You get an error saying you cannot connect to this Network.
2. So I changed the RAXE500 to Enhanced Open Security. The AX210 then connected. But the maximum speeds I could get were 929G down and 41G up. That is the same speed as my Lan when connected to the 1G RJ45 Jack built into the Laptop. So there is a bottleneck not letting it get to my 1.2G download speeds from Xfinity. If I use a 2.5G Lan Adaptor straight from my Netgear CM2000 to the 2.5G USB Jack I get my full speed around 1.3GBPS. I know many have had issues on Windows 10 and WPA3, but I am not sure why my speeds are bottlenecked. All of my test equipment is within 6ft of each other.

It seems like you still are not using the the 2.5GbE port on the router as the WAN port.

Iif you use the Yellow 1GbE WAN port on the RAXE500 then even with the AX210 it will not go over gigabit speeds because the WAN port is the bottleneck. if ou want the AX210 to give over 1 gigabit throughput, then you need to do the following.

1.  Head to the router web UI ( often 192.168.1.1 ).
2. Click on the advanced tab.
3. Go to Setup > Internet Setup.
4. Set WAN preference to " Multi-Gig Port (2.5/1Gbps).
5. Click on Apply.
6. Connect an Ethernet cable from the Ethernet port of the cable modem, to the 2.5GbE port of the router.
7. Once you have established internet connectivity, test the speeds, again, and it should offer speeds over 1Gbps.

That got my Intel AX210 to get a range from 600 and up to 1127MBPS. That's with everything within about 6ft of each other. Those speeds are not very consistent. I can only do this for testing purposes because it still cannot connect to the WPA3 Security. I have the 21H1 version of Windows 10. That part must be a Microsoft/Intel issue that may never get resolved.

Try usng the 5GHz band instead of the 6GHz band, and see if the speeds remain the same.

The 2.5G Port on the RAXE500 has been problematic since day one. It always disconnects. We woke up this morning with it disconnected again. The 1G Port never has these issues, so I think it's the hardware itself that is defective. I may do quick change back to the 2.5G for a test, but know that I cannot keep it on the 2.5G. Between that and the WPA3 issue it looks to be a no go. Thanks for your input.

For the 2.5GbE port, if using a longer Cat 5e cable, then in your Ethernet adapter settings in device manager, and disable options such as "Green Ethernet", energy efficient Ethernet, and other similar functions.

or if you have any reliability issues, then disable those options, which will improve SNR on the Ethernet cable.

Most of those green functions attempt to save extremely tiny amounts of power by using timings to estimate the length of the Ethernet cable, and then reducing the output to lower levels to save power. The issue is that if any aspect of the cable is not up to standard for 2.5 GbE, or if it is a cable that advertises a spec but lacks proper shielding, will end up with a bad SNR which can cause reliability issues.

All of my Cables are Cat 7 and 6ft or less. I always set my settings to max power and disable all power save modes. That 2.5G Port is just defective.

The standard power saving mode in terms of windows power management for the adapter is different from functions such as EEE, Green Ethernet and other 802.3az type functionality. Basically when below a certain length, (usually 50 meters), they go into their short reach mode and start cutting back on the power used to send frames. Sadly many switches and newer routers also support these functions and in turn will use it if enabled.

PS when terminating Cat7, make sure the braided outer shielding has some length left in tact for the grounding, and make sure the untwisted segment of the cable from the termination process is kept as short as possible, this is especially important if any green functions are on, since it bases everything on estimated length and simply assumes a near perfect conductor.

Also with solid core copper wire, if frequently moving them around, they will start to fail and cause many frame issues as compared to a cable with more flexible stranded copper.