Testing Overview

In total, we used three different testing locations, an “ideal” setup with the wireless router less than ten feet from the test laptop(s), and two different “distant” locations where the laptop is located several rooms away, with doors closed in between and several sheetrock walls. We also tested with two different routers, a Netgear WNR3500L and a Linksys E4200. At each location, we ran four different networking related tasks. The tests had the server PC connected directly to the Gigabit router via a six-foot CAT6 Ethernet cable, and the test PCs were otherwise idle (no extra processes, services, etc. were running).

The first task consists of copying files from the server to the test laptop. Here we have two different scenarios; the first is a single large file, a 2.2GiB HD movie. We time how long it takes to copy the file and then calculate the throughput in Mbps (1Mb = 1,000,000 bits). The second scenario consists of numerous small files. We use the contents of the Cinebench R10 and Cinebench R11.5 folders, which have a mix of a few larger files with many small files. In total, this test has 8780 files and 511 folders, with the total file size coming to 440MiB. Again we time the copy process and then calculate Mbps. Copying files between PCs is a completely real-world scenario, and with SSDs present in all of the test systems we should be bottlenecked by the networking performance (even a moderate HDD should be able to outpace WiFi speeds, but for Gigabit Ethernet you’ll want SSDs).

The remaining three tests are more theoretical rather than real-world. First up, we have the NTttcp utility. Unlike file copying, this test transfers data from memory between PCs, so the storage subsystem is out of the loop. We run two different scenarios, once with the laptop acting as “client” and the desktop being the “server”, and the second test with the roles reversed. This will test the maximum theoretical throughput of the laptop in both transmit and receive modes; most of the wireless devices do better at receiving vs. sending, but in a few instances the reverse holds. We used the following commands on the client/server:

ntttcpr.exe -m 6,0,[Server IP] -a 4 -l 64000 -n 4000
ntttcps.exe -m 6,0,[Client IP] -a 4 -l 64000 -n 4000

Our third test is very similar to the above, only we use Netperf instead of NTttcp and we conduct TCP as well as UDP testing. We use a precompiled version of Netperf that Bigfoot sent, but a Windows version is available from Chris Wolf that shows essentially the same results. One of the things to be aware of is that Netperf has a variety of options; we tested with the “stock” options, though Bigfoot has a second set of recommended command line parameters. The throughput can be very different depending on what options you specify and what wireless card you’re using. Several of the systems we tested with the Bigfoot parameters performed horribly on the UDP test, so we decided to stick with the stock Netperf command (though we’ll show the performance with the Bigfoot settings on the E4200 Ideal page as a reference point). The default options simply specify the IP address of the host, along with “-t UDP_STREAM” for UDP testing; the Bigfoot recommended commands for TCP and UDP are:

netperf.exe -l 20 -t TCP_STREAM -f m -H [Server IP] -- -m 1460 -M 1460 -s 4000000,4000000 -S 4000000,4000000
netperf.exe -l 20 -t UDP_STREAM -f m -H [Server IP] -- -m 1472 -M 1472 -s 4000000,4000000 -S 4000000,4000000

The key difference between the stock options and the Bigfoot parameters is the selection of a 1472 byte packet. The default UDP packet size is 1000 bytes, so that’s what most manufacturers optimize for, but larger packets are possible. Bigfoot states that video streaming often uses larger packets to improve throughput, so they’ve worked to ensure their drivers perform well with many packet sizes. Skip to the “ideal” testing with the Linksys router for more details of our Netperf UDP testing with the Bigfoot parameters.

Our final test is a measure of latency, and you might be tempted to take the results with a grain of salt as we’re using a utility provided by Bigfoot called GaNE (Gaming Network Efficiency). The purpose of this utility is to measure real latency between a client and a server, down to the microsecond, while simulating a network gaming workload. Most games don’t support any logging of network latency, so GaNE is an easy to use substitute. It sends a 100 byte UDP packet every 200ms, with a timestamp included in the packet. The client receives the packet and sends it back, and by looking at the timestamp the server can determine roundtrip latency. According to Bigfoot, the majority of network games send ~100 byte packets at intervals ranging from every 50ms to a few seconds apart, so they chose a value that would represent a large number of titles. While not all games are the same, there are long-established “best practice” coding standards for network gaming, so a lot of titles should behave similar to GaNE. For the test, two laptops connect to the server at the same time and GaNE reports average latency along with the average latency of the worst 10% of packets—the latter being a better measurement of jitter on your network connection.

Besides GaNE, we conducted some informal testing of latency with other utilities. First up is the Windows ping command; we saw latency spikes that are similar to those in GaNE so the results of both utilities appear valid. Ping doesn’t work like most games, however—it has smaller packets sent less frequently and it uses the ICMP protocol instead of UDP. That brings us to the third latency test. About the only games to include support for latency logging are Source Engine titles, so we tested latency with a local server running Counterstrike: Source using the “net_graph 3” utility. We’re unable to capture raw latency numbers this way, but we could clearly see periods of higher latency on all of the Intel WiFi cards. If anything, the latency blips tended to occur more frequently with CS:S than in GaNE, though interestingly enough the Atheros controller basically tied the Bigfoot in our experience (1ms ping times most of the match, with no discernable spikes). The Realtek card had a higher average latency of around 6ms, but at least there wasn’t a lot of jitter.

In short, latency measurements with GaNE, ping, and CS:S all show similar results, at least when measured over the same local network. Despite concerns about using a Bigfoot provided utility, it doesn’t appear that Bigfoot is doing anything unusual. The bigger concern is what the results mean in the world of Internet gaming. Since we’re running on a local network, latency is already an order of magnitude (or two) lower than what you’d generally experience over the Internet. For online gaming, the latency results we’re reporting end up being more of an additive latency, after the latency of the router to Internet server is factored in. In other words, if you’re playing a game where it takes 60ms for your data packets to get from the server to your router, what GaNE reports is how long it takes those packets to get from the router to your PC. The bigger issue with latency isn’t the 3-5ms average that you’ll get over the local network, but it’s the jitter where 100+ms spikes occur, and as noted GaNE provides an indication of jitter with the “worst 10% average latency” result.

We ran each of the above tests at least five times at each test location on each laptop, and most of the tests were run dozens of times. The reason is that we were trying to measure best-case performance at each location, so we didn’t bother trying to average all of the results. We did notice a distinct lack of consistency across all wireless cards, especially on 2.4GHz connections, but as noted in the introduction, interference from other sources is nearly impossible to avoid. We report the best result for each test, which was never completely out of line with other “good” results. If we averaged the best five runs on each device, we’d be within 3% of our reported result, but we skipped that step in order to keep things manageable.

With the test parameters out of the way, let’s move to our first testing location and see how the various wireless devices perform.

Introducing Bigfoot’s Killer Wireless-N 1102 Netgear 2.4GHz Ideal Performance
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  • JarredWalton - Wednesday, August 10, 2011 - link

    I was estimating. I just paced it off, and walking (around corners) it's about 50 feet. In a direct line, it's more like 30 feet. I'll update the distances, though it's all very rough. (I don't have blueprints for the house, but it's about 2300 sqft with an upstairs and downstairs; corner to corner is about 50 feet I'm guessing. I'm revising the distances to be as accurate as possible, but for reference that red vehicle in the driveway is almost 20 feet long if that helps.
  • theqat - Wednesday, August 10, 2011 - link

    Any idea when we can expect the Pollux review? I'm trying to make a decision on a laptop fairly soon and I'd love to see what you guys think about it before I do so.
  • Hrel - Wednesday, August 10, 2011 - link

    I kept looking for a range test but didn't see it. Having an issue with my Clevo P150HM, had to send it back to cyberpowerpc. Got no wifi signal at all at public places like panera and starbucks. I kind need internet in those places. Huge part of the reason I even have a laptop. It has the Intel 6230 in it cause I need bluetooth.
  • ggathagan - Wednesday, August 10, 2011 - link

    Page 7? Entitled "Testing Signal Range"?
  • Focher - Wednesday, August 10, 2011 - link

    Once again, Bigfoot's product doesn't really offer anything of extra value to alternative products (personally, I think the UDP test results are wonky and it's unbelievable that a current wifi device would best wired gigabit Ethernet, let alone dominate to the extent that the test showed). You're better off getting a true 3x3:3 card, even if the current performance only matches the 1102. At worst, performance will stay the same. But there's at least a chance that the addition transmit and receive channels will enable improved performance with a firmware update. Sure, if the 1102 is the default card in a particular laptop then fine (although I'd still take the Intel 6300 over it) but I sure wouldn't pay any price premium for it unless it's an upgrade option to replaces some default low end device.
  • neothe0ne - Wednesday, August 10, 2011 - link

    yeah, Lenovo and HP are horrible companies. HP is even worse because all their consumer products force you on WiFi Link 1000 (their Bluetooth is offered in a separate chip). Most of the Probooks and Elitebooks and the Envies use Centrino 62xx cards, thankfully... but they're still whitelisted.
  • Peroxyde - Wednesday, August 10, 2011 - link

    Hi experts,

    Sorry for off topic question. Can you please recommend a good wireless router? I have heard of TP-Link 1043ND as being well rated. Is it really better than Linksys or DLink? Thanks in advance
  • jigglywiggly - Wednesday, August 10, 2011 - link

  • iamkyle - Thursday, August 11, 2011 - link

    The majority of laptops can't even use this card thanks to the legalized monopolization of laptops via whitelists. That crap should be illegal.
  • The_Laughing_Man - Thursday, August 11, 2011 - link

    I think Bigfoot should sue those tier one laptop suppliers for anti-competitive practices.
    Whitelist should be illegal.

    I have a brand new HP laptop, I can replace the WiFi card after booting and it works just fine. It is even in the same WiFi family that comes with the laptop and Windows uses the same set of drivers for both cards. But the notebook will not boot with newer dual-band card installed during start-up due to HP whit-list in their BIOS.

    On top of that HP encrypts their BIOS such that is is very difficult to hack their BIOS to allow valid WiFi cards, not to mention other things.

    HP doesn't even offer an upgrade to a dual-band WiFi card for this very expensive high-end notebook the DV7T, even if I was willing to pay them for it.

    And Dell, Asus, Acer, and Sony all do the same thing.

    They all need to be sued. And until they remove their whitelists, Bigfoot will be forced to have a very small market to sell their mini-pcie killer-n card to.

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