We used our standard router storage test procedure to measure file copy throughput for FAT32 and NTFS volumes connected via USB 2.0 & 3.0. All the data is in the Router Charts; I'll be comparing USB 3.0/NTFS results only.
The 882 is far from the best performing product for this benchmark, landing in last place for write—with throughput about the same as seen with a USB 2.0 connection—and second from the bottom for read.
USB 3.0/NTFS storage performance comparison
|Test Description||D-Link DIR-882||
|WAN - LAN Throughput (Mbps)||939||937|
|LAN - WAN Throughput (Mbps)||939||941|
|HTTP Score - WAN to LAN (%)||46.1||57.9|
|HTTP Score - LAN to WAN (%)||38.2||57.6|
|Bufferbloat Score- Down Avg.||621||518|
|Bufferbloat Score- Down Max.||529||382|
|Bufferbloat Score- Up Avg.||446||363|
|Bufferbloat Score- Up Max.||351||232|
|CTF Score (%)||25||35.4|
Table 2: Routing throughput
D-Link and ASUS both show gigabit wirespeed routing using our simple iperf3-based test. But comparing the tougher HTTP benchmark averages slots the DIR-882 in the lower half of both charts. At least it beats both similarly-priced NETGEAR routers.
HTTP Score averages
Looking at a plot of the benchmarks that make up the averages above, shows the ASUS' extra processing power helps it better handle the smaller filesize benchmarks.
HTTP Score comparison
Plot key file size: [A] 2 KB, [B] 10 KB, [C] 108 KB and [D] 759 KB file
Comparing average Bufferbloat scores shows the 882 doing comparatively well and beating the much more expensive ASUS in both directions. Converting the score values to more relatable latency yields an average downlink latency of 1.6 ms and uplink of 2.2 ms.
Bufferbloat average score comparison
The Cut Through Forwarding tests look for throughput reduction when various router features are used. Enabling QoS and setting the machine running the test in the highest priority slot knocked throughput down to only 37% of normal, around 235 Mbps down and 349 Mbps up. I found no other features that caused a throughput hit.
The DIR-882 is not Wi-Fi Certified. It was loaded with 1.01B02 firmware and tested with the Revision 10 wireless test process . The router was reset to factory default, then set to Channel 6 and auto 20/40 MHz bandwidth for 2.4 GHz and Channel 40 and 80 MHz bandwidth for the 5 GHz radio. WPA2/AES encryption was used for all connections. The Revision 10 process still uses 20 MHz bandwidth for 2.4 GHz tests for throughput vs. range, but uses 40 MHz for peak throughput tests. These settings are enforced by the octoScope Pal test client.
The router body was centered on the test chamber turntable with all antennas vertical as shown in the photo below. The 0° position for the router had the front facing the chamber antennas. Although you see four chamber antennas in the photo, only the center two are used for throughput vs. attenuation testing, which is done with the Pal set to operate as a 2x2 AC device.
D-Link DIR-882 in test chamber
We'll start by comparing average throughput to get an initial feel for how the 882 measures up. It did quite well for 2.4 GHz, topping both down and uplink charts.
2.4 GHz average throughput comparison
The 5 GHz average plots show the 882 doesn't fare quite as well, moving down to the lower and middle sections of the plots at 138 Mbps downlink, 219 Mbps uplink.