Windows 7 64-bit will soon take over desktop computers.
(Credit: Dong Ngo/CNET)Consumers have had the option of 64-bit Windows computing since the release of Windows XP Professional x64 Edition in May 2005, four years after the release of Windows XP 32-bit. At the end of 2006, Windows Vista 32-bit and 64-bit versions were released simultaneously. Yet chances are you're currently using a machine that runs the 32-bit version of Windows.
This is about to change. Windows 64-bit has started to gain a significant foothold in the past two years as more systems ship with 3GB or more of memory. However, with Windows 7, 64-bit computing is likely to become even more common.
What's the difference between 32-bit and 64-bit computing? In a nutshell, the numbers refer to the amount of bits a computer can process in one computation. They also translate into the amount of random access memory (RAM) a computer can address. A 32-bit Windows computer can address a maximum of 4GB of RAM, while a 64-bit Windows machine can address up to 128GB and even more (64-bit applications can address theoretically up to 16 billion gigabytes of memory). So the higher number of bit means better computing, both in terms of precision and capability.
Despite the potential, the transition to the new platform has been slow. This is because of the high price of RAM and the lack of device drivers and 64-bit software applications. (Drivers are a special type of software that make hardware components work with the operating system. Without the sound driver, for example, your computer wouldn't be able to play music.)
Back when Windows Vista was released, 2GB of RAM, which is the recommended amount to make Vista run properly, could easily cost a couple hundred dollars. (This is one of the reasons Vista failed so badly as a new OS release.) There was virtually no 64-bit application then, either, other than a few game demos, and most hardware vendors didn't provide the 64-bit version of the drivers. Apart from this, 32-bit computers have been able to satisfy most of our daily computing needs.
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Fast silicon is hitting a wall in game PCs, according to Alienware, which is looking for ways to boost game PC performance.
Parent company Dell vowed on Tuesday to pour more resources into the game PC unit and invest in "product development, design, and engineering."
Alienware Area-51 m9750 notebook
(Credit: Alienware)Alienware's Marc Diana believes optimizing systems for the 64-bit world would allow game PCs to make big strides in performance. In effect, today's 32-bit environments are putting a crimp on PC-based gaming.
"So many people are caught up in this hardware race. Dual-core, quad-core this and that," said Diana, who is Alienware's product marketing manager for desktops. "If these companies--Intel, Microsoft, Nvidia, ATI, and AMD--if they'd just sit down and realize the performance benefit of optimizing their drivers and software for 64-bit."
"I think that would make sense now," Diana said emphatically.
Much of the software in the PC world is still 32-bit, including most copies of Windows XP and Vista. In fact, Diana said Alienware doesn't offer 64-bit operating systems because "we don't feel comfortable shipping a system to a customer with the 64-bit driver support that's out there in the industry."
The most obvious limitation of 32-bit operating systems and applications is a cap--4GB--on how much memory an operating system can use. And some applications can't even use the entire 4GB. "Who cares about DDR3 memory? What about giving me 4GB?" Diana asked.
"They're building (software) for something that is inherently very old technology," he said. "We (need) drivers that are very healthy in the 64-bit space. I'm not saying that 64-bit drivers don't exist. I'm just saying there's not enough software development and support on that end to warrant companies like us to move to 64-bit operating systems."
He also talked about other factors--beyond faster processors and graphics chips--that affect system performance, particularly for consumers who have limited budgets. "If I was looking to invest in one component over another," Diana said, "I would probably invest in a really good motherboard," and after that, a dual-core processor and a midrange graphics card such as Nvidia's 8800GT or ATI's X2 card.
New DDR3 memory is also becoming more of a factor. DDR3 memory is offered in two Alienware platforms. "It is the highest-performing memory now on the market. But I'm not so sure it's quite there yet. The cost is very high," he said. "Six months from now it will start making a lot more sense (economically) than it does right now." Because of this, DDR2 memory is still widely used.
DDR3 memory modules use less power and double the data prefetch buffer to 8 bits from 4 bits per cycle. DDR3 also operates at higher clock rates (1600 MHz), among other improvements.
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