Fist of all a 150 MBit/s Wireless N is MIMO 1x1 (1 antenna).
Intel(R) Dual Band Wireless-AC 8265 is 300 Mbit/s with MIMO 2x2
see
https://ark.intel.com/content/www/us/en/ark/products/94150/intel-dual-band-wireless-ac-8265.html
150 MBit/s = 18,75 MB/s
300 MBit/s = simply the double
There is also some overhead, transmission errors, signal quality and so
on that have influence. As I can remember the are also 20 MHz and 40
MHz mode, I do not known at the moment if this is relevant there.
Sometimes Segmentation Offload can be a problem, I have not check if one
or both of than support it.
Last but not least do not mix mbit/s with mb/s.
Hope that help.
Best Regards
On 11.08.19 19:11, kamaraju kusumanchi wrote:
> The internet download speed as measured by (speedtest.net) is ~15 Mbps
> when I try to connect from my desktop. From a different machine (my
> laptop), I get around ~30-40 Mbps. Could you please tell me how to fix
> this?
>
> Network connection:
> {desktop or laptop) connected wireless to -> linksys wrt54g router ->
> ISP (optimum)
>
> On the desktop, I am using "Panda Ultra 150Mbps Wireless N USB
> Adapter" <https://www.amazon.com/gp/product/B00762YNMG/> to connect to
> the router.
>
> The laptop has a builtin wifi adapter, Intel(R) Dual Band Wireless-AC 8265.
>
> The desktop is running Debian stretch. The laptop is running Windows 10 Home.
>
> Network adapter information on the desktop using lshw:
> % sudo lshw -C network
> *-network DISABLED
> description: Ethernet interface
> product: NetXtreme BCM5722 Gigabit Ethernet PCI Express
> vendor: Broadcom Limited
> physical id: 0
> bus info: pci@0000:01:00.0
> logical name: eth0
> version: 00
> serial: 00:10:18:ea:76:12
> capacity: 1Gbit/s
> width: 64 bits
> clock: 33MHz
> capabilities: pm vpd msi pciexpress bus_master cap_list
> ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 100
> 0bt 1000bt-fd autonegotiation
> configuration: autonegotiation=on broadcast=yes driver=tg3
> driverversion=3.137 firmware=5722-v3.09 latency=0
> link=no multicast=yes port=twisted pair
> resources: irq:26 memory:f3ef0000-f3efffff
> *-network DISABLED
> description: Ethernet interface
> product: NetXtreme BCM5761 Gigabit Ethernet PCIe
> vendor: Broadcom Limited
> physical id: 0
> bus info: pci@0000:05:00.0
> logical name: eth1
> version: 10
> serial: d4:ae:52:c2:bc:e3
> capacity: 1Gbit/s
> width: 64 bits
> clock: 33MHz
> capabilities: pm vpd msi pciexpress bus_master cap_list
> ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 100
> 0bt 1000bt-fd autonegotiation
> configuration: autonegotiation=on broadcast=yes driver=tg3
> driverversion=3.137 firmware=5761-v3.68 latency=0
> link=no multicast=yes port=twisted pair
> resources: irq:17 memory:f3de0000-f3deffff
> memory:f3df0000-f3dfffff
> *-network
> description: Wireless interface
> physical id: 1
> bus info: usb@7:3
> logical name: wlan0
> serial: 7c:dd:90:8b:a1:14
> capabilities: ethernet physical wireless
> configuration: broadcast=yes driver=rt2800usb
> driverversion=4.9.0-9-amd64 firmware=0.36 ip=192.168.0.12 link
> =yes multicast=yes wireless=IEEE 802.11
>
