Dell XPS M1730 Laptop Heat Noise
The M1730 has one of the largest cooling solutions I have ever seen on a notebook. The entire backside of the machine is essentially one giant vent. There are two large-diameter fans in the bottom of the notebook which force outside air into the notebook. During normal use the notebook is nearly silent; the fans come on in intervals and usually do not stay on for more than a minute. It takes a skilled ear to hear the fans even with no background noise. In a silent room, a quiet movement of air can be heard when the fans turn on. While gaming the fans are always on, but again, they are extremely quiet. I noticed that in games that make use of the Ageia PhysX card such as Unreal Tournament 3, the left-most vent jets out warm air and slightly more noise is made. I should note that when the system is overclocked, the fans are locked at full blast which IS noisy. I do not recommend

The surface of the notebook stays slightly above room temperature which is also impressive. The back of the bottom of the notebook can get toasty after a while but it never felt too hot to touch.
Overall, Dell has done an excellent job of finding a way to cool down the beastly components of the M1730 while keeping the machine quiet.
Dell XPS M1730 Laptop Battery Life
The battery in the M1730 serves as more of an Uninterruptable Power Supply (UPS) than anything else. Running with the screen brightness at full while surfing on Verizon wireless WAN, I measured 56 minutes of life. With the screen dimmed and the wireless turned off, battery life improved by about 20 minutes. Consider for a moment how much power this notebook consumes; Dell's regular Inspiron 17-inch notebook achieves almost 3 and a half hours of life with the same battery. With dual hard drives, dual video cards, and an Extreme processor, it is no wonder that the M1730 cannot stay unplugged for long. Anyone buying this notebook is probably not concerned with battery life so I do not view it as a con.
Dell XPS M1730 Laptop Wireless
The M1730 comes with an Intel Wireless WiFi Link 4965AGN wireless card as standard equipment, which supports 802.11a, b, g, and n wireless formats. I had no trouble connecting to wireless networks and it held wireless signals well, even through walls. Oddly enough the M1730 does not come with Bluetooth wireless as standard equipment and our evaluation unit did not have a module installed. It did however have Verizon Wireless Mobile Broadband WAN built in, which worked beautifully. I was able to connect to the Internet over the fast EV-DO network within seconds. I measured download speeds around 1 Mbit/second and upload speeds approaching 700kbps. Built-in WAN can be a handy feature but its usefulness on the M1730 is debatable, since this is the type of machine that will spend most of its life on a desk.
Dell XPS M1730 Laptop Sound Speaker
The M1730's stereo speakers are located at the front of the notebook below the palmrest area. Two small speaker cones can be seen through the speaker grills; they visibly pulse when playing music at elevated levels. For notebook speakers, the M1730's are wonderful. Treble is respectable and while bass is a bit lacking, it is still noticeable which is not something that can be said about many notebook speakers. Sound is detailed; I could hear bullet shells hitting the ground in games and picks hitting guitar strings in acoustic music. Overall, Dell has equipped the M1730 with two competent stereo speakers which suffice for playing music and games.
The M1730 has two headphone jacks located on the left side, which allows two people to tune into a movie or other audio.