Category Archives: tech tips

Best Ethereum mining GPU [Sep 20th, 2016]

Currently, as of September 20th 2016, the best GPU for mining Ethereum is the AMD RX 480. The criteria are cost, hashrate (in MH/s) and power usage. My current top pick is the Sapphire Radeon NITRO+ RX 480 8GB model with 1342 Mhz core clock speed, for approx 27-29MH/s. At current rates this $279 card should mine about $750 USD of Ethereum a year. 4GB or 8GB? 4GB models of the RX 480 offer a lower initial cost, but resale value

Lenovo X230 Memory Upgrade to 16GB [HOWTO] [VIDEO]

[Scroll to the bottom for a quick video of the upgrade process!] The Lenovo X230 (and its predecessor the X220) are absurdly easy to upgrade. Here is the X230 memory upgrade process: Power off laptop (fully OFF, not hibernate) Remove battery Remove two screws from memory access panel Remove existing RAM by releasing retention clips Securely install new upgrade RAM Replace cover & screws Replace battery and power ON! For the upgrade, I chose Crucial’s excellent 16GB DDR3 RAM kit

NanoStation Loco M900 default IP address (192.168.1.20)

Recently I setup a point-to-point (Layer 2, transparent bridge) using two Ubiquiti NanoStation Loco M900 wireless (900MHz) devices. For reference purposes, here is the default IP address as well as the default username/password: Ubiquiti NanoStation Loco Default Login Info: Default IP address: 192.168.1.20 Default username: ubnt Default password: ubnt Overall, the performance and link quality has been excellent. Range and resistance to interference has also been superior to most 2.4GHz/5GHz implementations. 🙂 If you have experience with NanoStations, feel free to leave a comment!

Printer connected to WiFi but shows offline [SOLVED]

Q. I have a printer that is connected to my home wifi network. It has an IP address and I can access its web interface from my PC. Sometimes I can print just fine from my Windows PC but other times it reports the printer is offline even when I know it is online. Can you help me? -email from Evan Thornton A. Hopefully! It sounds like a Windows printer driver configuration issue. Specifically, if your printer is getting its IP from a

Residence Inn Marriott, Springfield MO [business WiFi review]

I regularly stay in Springfield MO and Branson MO for business. I normally test the speeds at every hotel I stay in. Recently I stayed at the Marriott Residence Inn in Springfield MO and here are the results: ~2.0Mbps D/L* ~0.9Mbps U/L* *average of multiple tests throughout stay. Max D/L was 3Mbps, min was 1Mbps. Max U/L was always around 0.9Mbps. Overall, these are some of the worst speeds I have seen in southern Missouri. You can pay $8.95 a day for higher speeds,

Neverware CloudReady VM (for VMWare/VirtualBox) [FREE]

Recently several tech sites ran article about using Neverware’s customized version of Chrome OS to turn old PC hardware into Chromebooks. That is of course very cool 🙂 However, would like to be able to easily test Chrome OS on modern (relatively) high-end hardware. Preferably without having to dual boot. Virtual machines to the rescue! Here is the download link for Neverware’s VM, it works with both VMware and VirtualBox: http://go.neverware.com/freeVM44 Here are screenshots I took of the installation process

HDCP Stripper [SOLVED]

I recently encountered an issue where my DirecTV HDMI output was unusable on my new LCD. Thankfully, the following HDMI HDCP stripper allowed me to view the image on my TV 🙂 NOTE: The best price I could find (shipping from and to the USA) was $23.75 on Amazon and if you don’t already have the extra HDMI cable, they have them for $5.49. The process is very simple: Connect power to the HDCP stripper Connect first HDMI cable from DirecTV receiver to

JPS300V 5V DC power supplies for LED signs

The JPS300V DC power is a robust option for powering LED signs and other products that require relatively high amperage 5V output. 60A at 5V = 300 watts which is pretty hefty for a DC power supply. Out of approximately 80 PSUs, we have had around 2-3 fail. This is a roughly 3.8% failure rate in some fairly difficult situations (withstanding fairly intense heat, cold and moisture). Overall I would rate them as a good low-cost option especially if you can

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