I was unable to find any reviews for the XSPC Razor 5970 gpu water block so I decided to write my own. This is the first review I have written, so please go easy on me Please note that this review is just a general overview of the XSPC Razor 5970 water block. I am unable to go into great depth and measure more advanced things like flow restriction. I have installed several cpu water blocks, but this is the first gpu water block I have ever used/installed. You can find more detailed info on the block from the XSPC website along with some better pictures here: http://www.xspc.biz/razor5970.php Now let's get started! System specs: Intel i7 980x @ 3.38 everyday use & 4.4ghz for benchmarking Asus Rampage III Extreme mobo 12gb GSkill Trident 2000mhz DDR3 2 Sapphire ATI Radeon 5970's crossfired EVGA 9800gtx+ for physx 4 Vertex 2 ssds in raid 0 Corsair ax1200 PSU Cooler Master HAF X case Custum water cooling loop: HK 3.0 cpu water block, 2 swiftech MCP355 pumps, XSPC dual 5.25 bay resivoir, Black Ice 360 rad, 3/8 ID feser tubing & the new XSPC Razor 5970 water blocks At $79.95 usd, this is a very affordable block. I purchased two of these for roughly the same price as one of nearly all the other 5970 blocks available. 1. Packaging: The XSPC Razor 5970 comes in a boring white box, nothing fancy, but let's not judge a book by it's cover! Inside is everything needed for installation except barbs, however I was given the option to purchase them when I ordered it. The package includes- screws and washers, thermal paste, thermal pads, a set of plugs to seal up the unused ports, instructions and of course the block itself. The first thing I noticed about this block was weight- it is HEAVY!! However since this is the only GPU waterblock I've used, I have nothing to campare it to. The block itself looks very nice. It has four ports so you can put your barbs on the top or the bottom and comes with plugs to seal off the ports you won't use. Below are some pics: 2. Installation: The instructions included were very easy to follow and didn't leave me with any unanswered questions. You can find the exact instructions included if you want a more detailed description than mine here: http://www.xspc.biz/manuals/razor5970.pdf Preparing the block was very easy. Basically you just need to screw the plugs into the ports you aren't going to use and screw in the barbs. Next you prepare the 5970, which is more tedious but nothing to difficult. The only part that gave me a bit of trouble was removing the two screws next to the dvi port. I had trouble with the same screw on both cards. This however is a problem with the card and has nothing to do with the Razor. In case you are curious, there are two very small screws next to the dvi port, the top screw was the one that was difficult to remove on both cards. I don't know if only Sapphire cards have this problem, but regardless it is nothing major unless you rush and strip the screw. After removing the two dvi screws, all of the screws holding the backplate on and unplugging the fan, the next step is removing the old thermal paste and any residue left from the stock thermal pads. I used a q-tip and everything came off easily. Please note that one of my cores looks burnt in the pic below, it is just a reflection. Next, you put the thermal pads in place. There are a total of 10 pads and the instructions do a great job explaining where they go. After the pads are in place, it's time to put the thermal paste on. I decided to use my Arctic Silver 5 paste over the included paste. Next you place the water block on and line up the screw holes. Then you put the stock backplate on and screw everything in place. Again, the installation guide makes this easy, just make sure not to over tighten the screws. The last step is placing the card back into your system and hook it up to your loop. 3. Results: My temperatures with the stock cooler were manageable with one card. After installing the second and crossfiring them my temperatures were out of control. I had to use manual fan control and crank it up to the max making my system the loudest thing in the house, which is what prompted me to buy the Razor. All of the temperatures below are from a crossfire setup. Stock air cooler Idle- 40-54c (manual fan control off) Load - 64-86c (manual fan control on at 90c%) NOTE- my idle temperatures varied a lot. I also did not stress my gpu a lot due to the very high temperatures. After I installed the crossfire, I saw a huge increase in my temps and as a result ordered the Razor the next day. I was not comfortable stressing the gpu until I had proper cooling. I apologize that I don't have more detailed results here, hopefully we get some professional reviews on this block soon. Also, these temperatures were taken while running 3DMark Vantage. Razor 5970: Idle- 29-31c Load- 40-44c Again, I only tested with 3Dmark Vantage so I can get a proper comparision. As you can see the Razor has created a huge drop in my temps. 4. Conclusion The price of this block is amazing. $160 dollars to water cool both my 5970s still leaves me stunned. It was easy to install and drastically dropped my temperatures. I can't really say anything negative about this water block except that it is very heavy, however since this is the first gpu block I have used I have nothing to compare it to. XSPC is a very reputable and popular company in the water cooling community and they have certainly created a great block for the 5970. It is a nice looking piece of hardware, but I still think the stock board looks nicer inside my case, however looks aren't everything. While Sapphire's 5970 looks great, the cooling on it is terrible when crossfired. Now that my 5970s are cool and quiet, my next move is to overclock them and really test this block. I will post my results in more detail once that is done. That concludes my review for now. I'm sure many of you would have liked a more in depth review and I am sorry for that. Again, this is my first review and I know it's far from perfect. I will try to do a more in depth review soon, but I hope someone finds this helpful. Comments or suggestions are always welcome!