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Forum Discussion
Speed issues with RAX120 as AP
I have an internet connection of 1000Mbps download and 100Mbps upload. I use RAX120 as an ax AP for 4 ax clients, 2 phones (Samsung S10+,1x1 stream) and 2 laptops (AX200, 2x2 stream). The firmward wa...
I’ve run into issues with faster upload than download on occasion as well.
As for the S10+ it has a 2x2 antenna (2 streams) not 1x1 so it results make sense to get that high.
As for the S10+ it has a 2x2 antenna (2 streams) not 1x1 so it results make sense to get that high.
Thank you for pointing out the mistake. I am quite misinformed here. Confirmed by Anandtech review, then entire Samsung S10 family utilized 2x2 stream for WiFi. However, further confusion happened when my wife brought home a new phone, Huawei P40 Pro, which definitely has 2x2 stream, and it always gets 930Mbps on Speedtest whether my S10+ stuck at 650Mbps or get boosted to 900Mbps (after a few hours' use). When AX200 can only get 700Mbps, P40 Pro still gets 930Mbps easily.
I did a factory reset today and am glad to see the 2.4G can function well in 40Mhz mode and AX200 can eventaully connect. And after 5 hours of use, it still has not switched on the "special mode", so my AX200 is still getting 930Mbps alongside the new P40 Pro while my S10+ getting only 630Mbps. I'd hope to find a way to get all 2x2 stream phones to reach the same WiFi performance.
I think I have solved one mystery.
Mystery:
Why does P40 Pro gets 930Mbps on the same WiFi while S10+ gets only 630Mbps? when both are equipped with 2x2 stream.
Explanation:
1. RAX120's 160Mhz was not steady before reset. At channel 36, it will downgrade to 80Mhz after a while, which was why I observed after a couple of hours' use, WiFi performance on clients had seen a big change. This did not happen in the 20 hours after factory reset.
2. S10+ official WiFi description:
Wi-Fi 802.11 a/b/g/n/ac/ax (2.4/5GHz),VHT80 MU-MIMO,1024QAM
Up to 1.2Gbps Download / Up to 1.2Gbps Upload
P40 Pro official WiFi description:
802.11a/b/g/n/ac/ax, 2 x 2 MIMO, HE160, 1024 QAM, 8 Spatial-stream Sounding MU-MIMO
Download and upload peak physical rate up to 2.4GbpsAt 80Mhz, both S10+ and P40 Pro can reach 900+ Mbps on Speedtest, but at 160Mhz, P40 Pro can reach 930Mbps while S10+ peak at only 520Mbps.
3. AX200 speed issues:
I found that AX200 run well at 160Mhz, reaching 930Mbps easily on Speedtest, but at 80Mhz, it will peak at only 700Mbps. Rolling back old drivers helped solved this issue. I found that AX200 with driver version 21.20.0.5 can work normally at 80Mhz, peaking at 916Mbps.
The mystery unresolved:
ReadyShare still does not function as expected. Upload speed from AX clients (AX200) can easily surpass 100MB/s while download speed always top around 83MB/s. (The SSD connected to RAX120 can do 550MB/s read and 500MB/s write.) The performance is always like this regardless of factory reset, formating SSD again, using larger file (more than 10GB), running 5G at 80Mhz or 160Mhz, or switching Intel drivers for AX200.