
Monday, May 28, 2007
SeaLife DC 500

Wednesday, February 28, 2007
Does adding more RAM to your computer make it faster?

Up to a point, adding RAM (random access memory) will normally cause your computer to feel faster on certain types of operations. RAM is important because of an operating system component called the virtual memory manager (VMM).
When you run a program such as a word processor or an Internet browser, the microprocessor in your computer pulls the executable file off the hard disk and loads it into RAM. In the case of a big program like Microsoft Word or Excel, the EXE consumes about 5 megabytes. The microprocessor also pulls in a number of shared DLLs (dynamic link libraries) -- shared pieces of code used by multiple applications. The DLLs might total 20 or 30 megabytes. Then the microprocessor loads in the data files you want to look at, which might total several megabytes if you are looking at several documents or browsing a page with a lot of graphics. So a normal application needs between 10 and 30 megabytes of RAM space to run. On my machine, at any given time I might have the following applications running:
A word processor
A spreadsheet
A DOS prompt
An e-mail program
A drawing program
Three or four browser windows
A fax program
A Telnet session
Besides all of those applications, the operating system itself is taking up a good bit of space. Those programs together might need 100 to 150 megabytes of RAM, but my computer only has 64 megabytes of RAM installed.
The extra space is created by the virtual memory manager. The VMM looks at RAM and finds sections of RAM that are not currently needed. It puts these sections of RAM in a place called the swap file on the hard disk. For example, even though I have my e-mail program open, I haven't looked at e-mail in the last 45 minutes. So the VMM moves all of the bytes making up the e-mail program's EXE, DLLs and data out to the hard disk. That is called swapping out the program. The next time I click on the e-mail program, the VMM will swap in all of its bytes from the hard disk, and probably swap something else out in the process. Because the hard disk is slow relative to RAM, the act of swapping things in and out causes a noticeable delay.
If you have a very small amount of RAM (say, 16 megabytes), then the VMM is always swapping things in and out to get anything done. In that case, your computer feels like it is crawling. As you add more RAM, you get to a point where you only notice the swapping when you load a new program or change windows. If you were to put 256 megabytes of RAM in your computer, the VMM would have plenty of room and you would never see it swapping anything. That is as fast as things get. If you then added more RAM, it would have no effect.
Some applications (things like Photoshop, many compilers, most film editing and animation packages) need tons of RAM to do their job. If you run them on a machine with too little RAM, they swap constantly and run very slowly. You can get a huge speed boost by adding enough RAM to eliminate the swapping. Programs like these may run 10 to 50 times faster once they have enough RAM!
Thursday, February 22, 2007
Need For Speed Carbon !!!!

You'll make the streets of Palmont City yours over the course of the career mode.
Carbon continues the story where Most Wanted left off. For those just tuning in, Most Wanted ended with you recovering your stolen car and bailing out of the city of Rockport while the overzealous, anti-street-racing Sgt. Cross continued his pursuit. At the start of Carbon, you're making your way to Palmont City when Cross, now a bounty hunter, catches up with you and totals your car during the chase. Before he can collect his bounty on you, though, your old friend Darius steps in and pays off Cross. You are then put to work, taking over the turf of the other rival street-racing crews in Palmont City. It seems that you've got a history in this town that predates the events in Most Wanted. And during the course of the game, you'll learn more about that fateful night you skipped town. Different characters will give their takes on the night you supposedly ran off with a big red duffle bag full of cash. And by the end of the game, you'll not only find out what really happened, but you'll have taken over all of the street-racing territory in Palmont City.
Outside of the actual gameplay, one of the more endearing aspects of Most Wanted was the way it used live actors in CG environments for its story sequences. These sequences invariably featured plenty of actor/model types, trying a little too hard to talk tough and failing spectacularly at it. The technique remains the same in Carbon, though there are more story sequences now and a slightly more self-aware tone. The heavy use of flashbacks is an interesting idea, but the story ends up being kind of muddled. And none of the villains come off as particularly menacing. Although it's hard to really qualify any of it as sincerely good, it's just over-the-top enough that folks who enjoy stuff like The Fast and the Furious, ironically or otherwise, should get some enjoyment out of it.
Most Wanted had you racing to raise your visibility with the police and take on the most notorious street racers in Rockport. In Carbon, it's all about turf. Palmont City is divided into four major territories, each of which is predominantly controlled by a different street-racing crew. Each territory is then further divided into zones, and within each zone, you'll find starting points for a variety of different race events. Winning at least two events in a zone will put it under your control. And once you've taken over all the zones in a given territory, you can take on the head of that crew. As you continue to extend your reach across Palmont City, rival crews will come back and try to retake territory the same way you took it from them, forcing you to accept their challenge if you want to maintain control. Having to go back and rerace events that you've already won is kind of a pain, but the open-world structure is nice and gives you plenty of options to take on races at any given point.
However, you won't be taking on all of these crews by yourself, because Carbon lets you bring along a wingman into many of the races. These computer-controlled companions break down into three different behavior types--blockers, drafters, and scouts. Blockers will run interference for you, spinning out opponents at your command. Drafters let you slipstream behind them, giving you some extra speed from the reduced drag, and from there you can pull aside and slingshot your way past them. Scouts have a knack for finding the many alternate routes and shortcuts that can be found in most races, and they have short neon tracers that follow them, making it easier for you to take advantage. You'll definitely find yourself in races where your wingman's influence is the difference between winning and losing. But often, your wingman's presence is either unnecessary or an actual hindrance. Blockers are only really effective in taking out competitors that are behind you, and even then, they're not very reliable. Drafters work as advertised, but the lengthy straightaway needed to set up a proper draft is rare in Palmont City, which limits their usefulness. Scouts are the least useful of the three because the neon tracers don't seem to get longer as the cars you drive go faster, so eventually, there's just not enough time for you to anticipate an alternate route. If you didn't call on your wingman, you might expect him or her to just hang back. But we found ourselves getting bumped into and boxed in by our wingman on several occasions. It's not ruinous to the experience, but sometimes it makes you wish they would just go away.
Canyon duels are challenging, but their repetitious structure can sometimes make them wearying.
The game relies on some pretty tried-and-true types of races, but it also throws some curves. You'll find plenty of common stuff, such as lap-based circuit races, point-to-point sprints, and checkpoint races. But there are also some unique races, such as the speed-trap race, where your standing is determined by your cumulative MPH as you race through a series of speed traps. Most races take place on the city streets of Palmont, but there are also drift events, which can take place either on a closed racecourse or on the winding canyon roads that surround the city. The goal in the drift events is to score points by making clean drifts around corners. The car-handling changes completely for the drift events and feels much more slippery than in the rest of the game, which recalls the drift events found in Need for Speed Underground 2.
All on All a very cool Game to go for ...............
Even though the wingman mechanics and canyon races don't quite pan out, it's still a stylish and enjoyable street racer.
The Good: More-solid FMV sequences; loads of customization options; solid core gameplay.
The Bad: Frustrating boss battles; underutilizes police chases.