i can assure u tht ps.3 is far far better than xbox 360. below r some true facts.
The PS3's 3.2 GHz Cell processor, developed jointly by Sony, Toshiba and IBM ("SIT"), is an implementation to dynamically assign physical processor cores to do different types of work independantly. It has a PowerPC-based "Power Processing Element" (PPE) and six accessible 3.2 GHz Synergistic Processing Elements (SPEs), a seventh runs in a special mode and is dedicated to OS security, and an eighth disabled to improve production yields. The PPE, SPE's and other elements ("units") are connected via an Element Interconnect Bus which serves to connect all of the units in a ring-style bus. The PPE has a 512KB level 2 cache and one VMX vector unit. Each of the SPEs is a RISC processor with 128 128-bit SIMD GPRs and superscalar functions. Each SPE has its own L1 cache. The floating point performance of the whole system (CPU + GPU) is reported to be 2.18 TFLOPS. PlayStation 3's Cell CPU achieves 218 GFLOPS single precision float and is reported at around 26 GFLOPS double precision. The PS3 will ship with 256 MB of Rambus XDR DRAM, clocked at CPU die speed.
The real world results indicate this Cell processor allows programmers to assign SPE's to do different work by instructing the SPE cores to run special programs. For example, you can instruct one core to work on decoding and multiplexing audio, another core to perform computations on realistic projectiles subject to changing gravity constraints and yet another to govern the activities of the main character. The programmer still has 3 more cores not yet assigned but the only remaining task is to collect the work performed and display the results on the screen. Now that each core can be dedicated to one task instead of being interrupted and switching contexts repeatedly like conventional architectures, the efficiency and throughput goes up.
The Graphic processing unit is based on NVIDIA G70 (previously known as NV47) architecture, which focuses on maximizing per-pixel computation in favor of raw pixel output. The GPU will make use of 256 MB GDDR3 VRAM clocked at 700 MHz. The GPU has access to the XDR main memory as well.
It also supports a wide array of standard and HDTV resolutions and connectivity options (such as HDMI and Component video). In terms of audio, the PS3 will support a number of advanced audio formats, including 7.1 digital audio, Dolby TrueHD, and others. For the optical drive, a wide variety of DVD and CD formats are supported, as well as Blu-ray Disc. A 20 GB / 60 GB 2.5" SATA150 Hard Disk Drive is pre-installed and coupled with Linux. In the 60GB configuration, Flash Memory can also be used — either Memory Stick, CompactFlash, or SD/MMC. For communication, the PS3 will have one Gigabit ethernet port, four USB 2.0 ports, and will support Bluetooth 2.0 EDR.
The console uses heat pipes and Sony claims the system will be as quiet as a slim PS2. Physically, the PlayStation 3 is approximately 5 kg (11 lb), 9.8 cm × 32.5 cm × 27.4 cm (3.9 in. × 12.8 in. × 10.8 in.). The power supply will be built into the console. A standard 3-pin IEC connector is present at the base of the console.
whereas xbox 360
The Xbox 360 is similar in form factor to its predecessor. It is slightly slimmer in every dimension, and the industrial design helps reinforce this impression; the Xbox 360 is white and slightly concave, whereas the original Xbox was black and noticeably convex. The Xbox 360 is also about 350 grams lighter than the original Xbox. Much of this savings in size and weight was achieved by moving the power supply out of the console proper; the power supply by itself displaces 1300 cubic centimeters.
Central Processing Unit
The Xbox 360 takes a very different and new approach to hardware compared to its predecessor. The CPU, named Xenon, is a custom triple-core PowerPC-based design by IBM. The CPU emphasizes high floating point performance through multiple FPU and SIMD vector processing units in each core. Each core of the CPU is simultaneous multithreading capable and clocked at 3.2 gigahertz. However, to reduce CPU die size, complexity, cost, and power demands, the processor uses in-order execution in contrast to the Intel Coppermine128-based Mobile Celeron used in Xbox which used more robust out-of-order execution. A 21.6 GB/s front side bus (aggregated 10.8 GB/s upstream and downstream) connects Xenon with the graphics processor/northbridge. Xenon is equipped with a 1 megabyte CPU cache on-die running at half CPU clock speed. This cache is shared amongst the three CPU cores.
Graphics Processing Unit
Xbox 360 GPU; note the smaller eDRAM die to the left of the main Xenos dieIn addition, while the first Xbox's graphics processing unit (GPU) was produced by NVIDIA, the Xbox 360 uses a chip designed by ATI called "Xenos" (Developed under the name "C1" or "R500"). Xenos contains 48 unified shader units, which are capable of both vertex and pixel shading operations. This is in contrast to older graphics processor designs which utilize separate specialized units for these tasks. The GPU package contains two separate silicon dies: the GPU proper and a daughter-die containing 10Mb eDRAM along with FSAA and post-processing functionality. Both the GPU and eDRAM have a clockspeed of 500 MHz. The GPU also houses additional capabilities typically separated into a motherboard chipset in PC systems.
Heatsinks are implemented to cool both the CPU and GPU of the console. The CPU heatsink is composed of aluminum fins with a copper base and uses heat pipe technology to further aid in heat transfer efficiency. The GPU heatsink is solid aluminum and is wider but not as tall as the CPU heatsink. The heatsinks are actively cooled by a pair of 60 millimeter exhaust fans that push heated air out of the case.
Xbox 360 Bandwidth Diagram
The console features 512 megabytes of 700 megahertz GDDR3 RAM on a 128-bit bus. The memory is shared by the CPU and the GPU via the unified memory architecture.
All games made for the Xbox 360 are required to support at least six channel Dolby Digital surround sound. Additionally, a wide array of standard and HDTV resolutions, up to 1920×1080 in progressive mode (after fall software upgrade), are supported by the console hardware. The Xbox 360's optical drive supports a variety of DVD-ROM formats as well as most common CD-based formats. The option to apply a regional lockout to games is available to publishers. DVD region codes are always enforced. A 20 gigabyte detachable hard drive is available for game saves and downloads (included in the non-Core version of the console), as are small, portable memory cards.
Xbox 360 also has a built-in 100BASE-TX RJ45 ethernet port, suitable for connecting to Xbox Live, and three USB ports.
Components and accessories
Main article: Xbox 360 components and accessories
An Xbox 360 Wireless ControllerUp to four controllers are supported by the Xbox 360, in either wired or wireless forms. An optional wireless force feedback racing wheel for racing games is available as well.
The Xbox 360 can connect to Xbox Live through an optional wireless network adapter on a home network through a wireless router. The Universal Media Remote can be used to control several functions of the console including the Windows Media Center functions if connected to the network.
Various other components for the console exist, such as decorative faceplates to change the physical appears of the console, wired or wireless headsets for communication over Xbox Live, and a Xbox 360 branded webcam called Xbox Live Vision Camera. An add-on external HD DVD drive will be released this November 17th in Japan for ¥19,800. For North America and Europe, the HD DVD drive is sceduled to be release this holiday season 2006.
· 1 decade ago