mas os 64bits virem só porque temos mais memória não é algo assim tão positivo... os 64 bits deviam aparecer naturalmente mas com o surgimento de softwares criados para essas plataformas.. optimizados pelo menos..
nesse caso o 64bits também não é necessário.. lá está o circulo vicioso.. 2Gb para o utilizador comum, ou os 4Gb num sistema 32bits ou até 36bits (com PAE) é mais que suficiente (neste momento)Pois mas o mainstream de utilizadores de PC não necessita de software que trabalhe especificamente com 64Bit... por isso os 32BIt ainda são usados...
CUmps
nesse caso o 64bits também não é necessário.. lá está o circulo vicioso.. 2Gb para o utilizador comum, ou os 4Gb num sistema 32bits ou até 36bits (com PAE) é mais que suficiente (neste momento)
Penso que a evolucao de 32 para 64bits vai ser mais lenta do que a que se assistiu á passagem dos 16 para 32bits.
There appears to be a shift taking place in the PC industry: the move from 32-bit to 64-bit PCs.
We've been tracking the change by looking at the percentage of 64-bit PCs connecting to Windows Update, and have seen a dramatic increase in recent months. The installed base of 64-bit Windows Vista PCs, as a percentage of all Windows Vista systems, has more than tripled in the U.S. in the last three months, while worldwide adoption has more than doubled during the same period. Another view shows that 20% of new Windows Vista PCs in the U.S. connecting to Windows Update in June were 64-bit PCs, up from just 3% in March. Put more simply, usage of 64-bit Windows Vista is growing much more rapidly than 32-bit. Based on current trends, this growth will accelerate as the retail channel shifts to supplying a rapidly increasing assortment of 64-bit desktops and laptops.
64-bit PCs running 64-bit editions of Windows Vista typically have 4GB of memory or more. Compared to 32-bit systems, which top out at around 3GB of memory, 64-bit PCs can offer added responsiveness when running a lot of applications at the same time and have the potential for greater performance and new experiences as next-generations applications are written to take advantage of this new platform.
A common misconception is that 64-bit architectures are no better than 32-bit architectures unless the computer has more than 4 GB of memory. This is not entirely true:
* Some operating systems reserve portions of process address space for OS use, effectively reducing the total address space available for mapping memory for user programs. For instance, Windows XP DLLs and userland OS components are mapped into each process's address space, leaving only 2 to 3.8 GB (depending on the settings) address space available, even if the computer has 4 GB of RAM. This restriction is not present in 64-bit operating systems.
* Memory-mapped files are becoming less useful with 32-bit architectures, especially with the introduction of relatively cheap recordable DVD technology. A 4 GB file is no longer uncommon, and such large files cannot be memory mapped easily to 32-bit architectures; only a region of the file can be mapped into the address space, and to access such a file by memory mapping, those regions will have to be mapped into and out of the address space as needed. This is a problem, as memory mapping remains one of the most efficient disk-to-memory methods, when properly implemented by the OS.
* Some programs such as data encryption software can benefit greatly from 64-bit registers (if the software is 64-bit compiled) and effectively execute 3 to 5 times faster on 64-bit than on 32-bit.
The main disadvantage of 64-bit architectures is that relative to 32-bit architectures the same data occupies more space in memory (due to swollen pointers and possibly other types and alignment padding). This increases the memory requirements of a given process and can have implications for efficient processor cache utilization. Maintaining a partial 32-bit model is one way to handle this and is in general reasonably effective. In fact, the highly performance-oriented z/OS operating system takes this approach currently, requiring program code to reside in any number of 32-bit address spaces while data objects can (optionally) reside in 64-bit regions.
Está a ser completamente ao contrário, está a ser mt mais rápida. Ainda me lembro o Bill Gates dizer que nunca iria precisar dos 32bits..
Aqui é igual, tenho vista 64bit num de 2GB ram e a estabilidade não se compara com 32bit e ao menos a hibernação funciona como deve ser. O único inconveniente que vejo em 64bit é que o sistema não parece ser tão solto quanto 32bit, talvez derivado do uso de várias aplicações 32bit que podem piorar um pouco a performance geral.
fiz uns testes no meu laptop, ambos com SP1 instalado e fresh install, vou ainda fazer com XP SP3
_________________________________Vista Ultimate x64 -------- Vista Ultimate x86
Passmark Performance Test 6.1 -------570 -----------------------523
PCMark Vantage. ---------------------2908 ----------------------sem resultado ( trial key )
3DMark03. ---------------------------1769 ----------------------1710
3DMark06. ---------------------------611 -----------------------557
PCMark05. ---------------------------não testado ---------------3743
cinemark benchmark
Open GL Test ------------------------911 -----------------------618
Single CPU Render Test. --------------2058 ----------------------1847
Multiple CPU Render Test -------------3933 ----------------------3475
Faltam os jogos a 64 Bits....
já agora podes dizer quais são as caracteristicas do laptop?