AR9280 low speed

I have two Atheros AR9280 named AR5BHB92-H.

One of this card I used with RouterOS x86 6.0rc5 on Intel DN2800MT, and another in Notebook.
Speed of established connection, shown as 300Mbit, but actual up/down with BTest is about 14-15Mbit.
When I use AR9285 on RouterOS side, I achieve 90-100 Mbit with BTest.

How to solve low speed problem with AR5BHB92-H ?

I have used this exact same card (AR5BHB92-H) in a DN2800MT board.. I achieved speeds of 160+ mbit/s TCP. (RouterOS 5.xx)

With 6.0rc2-rc3-rc5 and 5.21, I have same low speed with both my cards.
I think we have different FW on cards.

The firmware is loaded via software (RouterOS, so they are the same for us.
But maybe I’m mistaken..
It could be I did not use this AR5BHB92-H (AR9280) card, but a AR5BHB112 (AR9380) card.
Maybe I can test again tomorrow with both cards…
BTW: This AR5BHB112 card is only 13 euros on ebay.

I use AR9380 for 5GHz, and speed is Good - about 150MBit.
AR9280 used for 2.4GHz - and speed is 14MBit.

Which BIOS version on MB ?

Right now I’m running 6.0beta6, MB with bios 0163, and AR9380 cards: 185 mbit/s TCP with a single iperf sesssion (NV2).
Other side is an RB600A (@533mhz, conntrack off) and RB52n card (AR9220).
I go try an AR9280 later today.

I installed this AR9280 card again. Just like you I got speeds of about 10mbit/s. When connecting the same antenna to the AR9380 card I got speeds of 185 mbit/s.
My AR9280 could be broken… I don’t use it currently.

Update: I installed this AR9280 in an Ubuntu machine and connected it to a 2,4GHz AP (non-MT). That works perfectly.
It could be there is something wrong with the 5GHz part on my card, but probably this is indeed a RouterOS problem.

My AR9280 in an Ubuntu machine work well as client at 2.4GHz and 5GHz (150-160Mbit when connected to AR9380), but with Mikrotik low speed on both 2.4GHz and 5GHz.
I have another card with AR9283 - and with it same problem, low speed.

how are you testing that AR9280 in RouterOS?

My situation:
Intel DN2800MT with 2 AR9380 cards and 1 AR9382 card. For this test I swapped the AR9382 card for a AR9280 card.

The setup:
Linux machine →
Netgear managed switch →
*Juniper SRX210 router →
Netgear managed switch →
*x86 machine with RouterOS 6.0rc6 and AR9380/AR9280 wifi →
(wireless NV2)
*RB600A with RouterOS 5.22 and AR9220 wifi →
*RB450G with RouterOS 5.1x–>
RB250GS →
Linux server →
Linux VM

*=routing through OSPF.

I run an iperf session (TCP, 1 session, default settings) between both linux machines.
AR9380 in DN2800MT: 185 mbit/s
AR9280 in DN2800MT: +/- 10 mbit/s

please note that you are using an old RouterOS version (6.0beta6). You need to upgrade the OS to v6.0rc6.
Also note that Nv2 wireless protocol isn’t working correctly with x86 and that is why you might not get correct results.
Try to test with 802.11 or nstreme protocol.

oops, I meant 6.0rc6.

Also note that Nv2 wireless protocol isn’t working correctly with x86 and that is why you might not get correct results.
Try to test with 802.11 or nstreme protocol.

I will, maybe this evening.

RouterOS 6.0rc6
Wireless protocol 802.11 (both 2.4GHz and 5GHz).

Tested with BTest (and file transfer from wired client) on Notebook with AR9280.

AR9280: 15 mbit/s
AR9283: 20 mbit/s
AR9285: 130 mbit/s
AR9380: 150 mbit/s

With AR9382 you have normal speed ?

Yes… probably just as good as AR9380, but I cannot perform a good test right now, part of the network is stressed:)

Update: tested again: speed is good on AR9382. It is a little bit lower (165 instead of 185) because this card has less power (and maybe worse sensitivity), so it connects at 270 mbit, not 300.

I got similar problem on AR9280 AR5BHB92 with RB912UAG-5HPnD. Signal -110 on ch0 and -90 on ch1, 5GHz or 2.4GHz, connection is possible only when I placed client device right on routerboard and it’s unstable of course.