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This review is from: DEEPCOOL GAMMAXX 400 CPU Cooler 4 Heatpipes 120mm PWM Fan with Blue LED
Pros: Easy installation with push-pins just like the stock intel heatsink.
4 pin fan letting OS or mobo set fan speed
Tower design blows hot air straight out the back of the case instead of spreading it around inside.
Better performance than stock Intel heatsink
Cons: Probably not ideal for high-end or overclocked cpus.
Push-pin mounting isn't ideal for tower HSFs, even ones as light as this one is. Any bumping of the case will put a huge amount of pressure on the pins, possibly enough to break them or pull them out. This could lead to cooking the cpu with no warning, or even let the HSF fall and damage other components.
There are no rubber strips between the fan and HSF, so any fan vibration will be transmitted to the HSF which usually makes it louder.
The fins are press-fit onto the heatpipes instead of being soldered.
Baseplate is not flat so you'll need to use a thicker layer of thermal transfer paste between the cpu and HSF base.
Fan may interfere with RAM slots, and base touches some capacitors near the cpu socket.
The only instructions are printed on the back of the box with only pictures. A larger fold-out sheet of paper with the same pictures would have been a lot easier to follow. Also, I don't think the instructions show applying the thermal paste (its hard to tell, there is a step showing a square that might be the cpu, but no words at all?) so people who haven't done this before might skip that crucial step. Some words and better instructions would be a BIG improvement.
Other Thoughts: On unboxing, I was surprised at how light this HSF is. The HSF is mostly aluminum except for the heatpipes, so it weighs a lot less than other tower HSFs I've used. While this makes the pushpin mounting system workable, it's a minimalist approach to heatsink design that could affect performance. Some fins were slightly bent during shipping. The heatsink isn't secured very carefully in the box and the accessories are loose inside a smaller box inside the large retail box. The baseplate comes covered with a protective sticker, but the baseplate isn't even close to flat due to the direct heatpipe contact design of the HSF. The package includes sufficient hardware for installation and also a small packet of thermal transfer past. I used my own paste, artic ceramique 2, which I've had good luck with in the past.
During installation, I had to remove the fan and my RAM to get enough clearance to push in all the push-pins. Once I did that, I saw that the fan's mounting position can be adjusted up and down a little bit based on where the clips fit in between the heatsink fins. This helped a lot because the fan overlaps my ram slots and the ram would have prevented installation if I hadn't been able to raise the fan up about a centimeter. Also, on my mobo the baseplate of the HSF touches a row of capacitors near the cpu, so the design and production tolerances of this are perfect, from the perspective of if it was even 1mm larger, it wouldn't have fit.
I compared this heatsink to the stock intel heatsink on my core i5-2500 cpu. The cpu is running stock inside a mini-tower case. Ambient temps in the room were about 76F. I measured cpu temps with speedfan, and used prime95 to load the cpu.
Stock intel HSF:
Idle: 33C, Load 82C
Idle 32C, Load 64C
So this HSF gave significantly better performance than the stock HSF. During testing, this HSF was essentially silent at idle and very very quiet at full load, a good sign.
I also noticed that mobo/ram/hd temps were much lower with the Gammaxx HSF, with mobo temps dropping from 61C with the stock HSF to 51C using the Gammaxx HSF. This is most likely due to the tower design which exhausts the hot air directly out the back of the case.
The Gammaxx 400 is a good HSF for mid-range cpus, but I would be very hesitant to recommend it for high-end or overclocked cpus. Design choices like the push-pin mounts, the press-fit fins, and the non-flat base, all reduce the product's performance. Considering the price, I would say that this is at best an "ok" choice. There are other similar HSFs for the same price that have different construction features that would make them more effective. The push-pin mounting also gives me pause. So, I recommend it and plan on continuing to use it in my computer, but I have some reservations regarding design quality and will need to keep checking to ensure it doesn't fall off each time I move the computer.
Pros: I have the 32GB version of this tablet and it has FAR exceeded my expectations. The quad core atom cpu is "fast enough", and running one or two things at once like office one note plus email, or email plus word, or email and a web browser, works great within the 2GB ram that this tablet has. The 32GB storage isn't really large enough, but a 64GB microSD card is really cheap so that should probably be the first accessory you get for this tablet. With a Bluetooth or USB keyboard/mouse, this could easily be a go-anywhere laptop replacement. And for a student or someone who doesn't do anything too demanding on their computer, this could even be hooked up to a monitor and desktop-style USB keyboard/mouse (through a powered USB hub ideally) and turn into a complete desktop replacement.
The IPS screen is bright and I haven't had ANY issues with it, mostly since I don't expect to be doing any hardcore image editing with it. If I need accurate colors I'll use a good IPS desktop monitor.
Battery life is really good. This thing is a bit thicker than some other competing tablets but I think they used the extra space for more battery. Plenty of runtime, I haven't run out yet in just a couple of weeks using this tablet.
Cons: I still don't like windows 8 after setting up this tablet for my own use. It's clunky and obscures features without making anything easier to use, and Microsoft STILL hasn't figured out how to make windows work on a small screen. But that's a mark against windows 8, not this tablet. As far as I can tell win8 works the same on this and any other similarly sized small tablet.
Other Thoughts: The back is plastic and doesn't feel very solid, but most people will probably put this into a case or cover so the thin plastic back is actually a reasonable design choice I think.
I got this device just to see if I liked and would be happy using win8 on a tablet before paying the big bucks for a Microsoft surface pro 3, but after seeing how useable this little tablet is, I may not get the surface pro after all. Don't really need it, this tablet is "good enough" for when I'm away from my desktop and don't want to lug around my full size laptop.
Pros: The WRT1900AC router is pretty much a do-it-all item that would be a great addition to either someone just setting up a new network, or someone looking to add a LOT of features and usability to their existing network. Getting past the marketing, here are the features I found the most useful to me in my home personal and small office network.
Fast network storage - They put a fast enough processor in this router to make network transfers from attached devices pretty fast. My solution ended up being attaching an older unused laptop drive to the router using the eSATA port, and it ended up being a very nice way to share information over the network. The laptop drive attached to the router turned out to be faster than my old larger mass storage NAS box, making drives attached to the router a much quicker way to share large files that don't need the backup redundancy provided by my NAS.
The wireless and network monitoring/management features were also pretty nice. I was able to see which devices were on the network at a glance and even set priorities for them (meaning my wife gets all the bandwidth!)
Speed - 802.11ac is where its at. I don't have hard numbers this time, but the wireless connection speed with a matching 802.11ac adaptor on my laptop was more than 4 times as fast as the same laptop connected with 802.11n, even across the house. Very quick.
Cons: Yes, it's kind of expensive. With all multi-purpose devices I think there is the potential to have *too many* features, and this device treads very closely to that. I think the biggest drawback is that some users might not have use for all of the features and might accidentally leave one enabled that opens up a security risk. For a simple example, leaving wifi enabled but not using a good password is a very common problem for people with a wireless router that don't actually have any wireless devices! The issue I ran across with this device was that when I was done exploring the device options I inadvertently left active file sharing without protections, and only noticed a day later that my shared files were visible without a password to anyone on the network.
So you'll just need to use caution and I recommend disabling the features you don't need and setting reasonably complex passwords for everything.
Other reviews have covered the open-source issues, so I won't touch on them other than to note that most people who just want their router to perform as advertised won't care, as long as the router meets their needs. For the hardcore networking admin or superuser, there is plenty of material out there to read that goes well beyond the scope a product review here...
Other Thoughts: For someone setting up their first network or trying to add features and speed to an existing home network, this might be a nearly ideal router. It has tons of useful features including very up to date tech like USB 3.0 and fast eSATA for attaching shared storage, and the network management features can help keep track of where everything is. Wireless range and speed was top notch, comparable with the capabilities of another brand's 802.11ac router that I've been using for quite a while now.
Based on the feature set and ability to really boost both speed and network usefulness, I recommend this router for pretty much anyone except the complete newcomer who only wants a basic router to attach one computer and one laptop to the internet. For them, go with something cheaper. For everyone else though, this may be a really good choice.