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PNY VCQFX1700-PCIE-PB Quadro FX 1700 512MB Professional Graphic Card
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Post Date : Dec 01, 2011 08:10:19
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NVIDIA Quadro FX 1700 by PNY graphics boards deliver exceptional price/performance and quality for professional applications. NVIDIA¿s innovative unified architecture allows the FX 1700 to dynamically allocate geometry, shading, and compute processing power to deliver optimized performance while enabling Energy Star power savings. A 512MB GDDR2 frame buffer makes the FX 1700 Microsoft Vista ready and capable of displaying the full Windows Aero user interface. The reference standard for Shader Model 4.0, the NVIDIA Quadro FX 1700 by PNY enables next generation ultra-realistic, realtime OpenGL and DirectX 10 visualization applications. With two dual-link DVI-I connectors, the FX 1700 offers superb image quality at resolutions up to 2560 x 1600 at 60Hz. The NVIDIA Quadro FX 1700 by PNY takes CAD, DCC and visualization applications to new levels of interactivity by enabling unprecedented capabilities in programmability and precision. The industry¿s leading workstation applications leverage Quadro GPU technology to enable hardware-accelerated features, performance, and quality ¿ along with certification for stability and superb display quality. The NVIDIA Quadro FX 1700 by PNY delivers an outstanding blend of price/performance that makes it an ideal component of any professional workstation.
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Sunday, November 27, 2011
EVGA GeForce GTX 570 Superclocked 1280 MB GDDR5 PCI Express 2.0 2DVI/Mini-HDMI SLI Ready Limited Lifetime Warranty Graphics Card, 012-P3-1572-AR
!±8±EVGA GeForce GTX 570 Superclocked 1280 MB GDDR5 PCI Express 2.0 2DVI/Mini-HDMI SLI Ready Limited Lifetime Warranty Graphics Card, 012-P3-1572-AR
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Price : $364.99
Post Date : Nov 27, 2011 16:15:55
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Introducing the EVGA GeForce GTX 570 Superclocked. Enjoy blistering fast DirectX 11 performance, including tessellation performance that destroys the competition. Experience a whole new level of interactive gaming with SLI and combine up to three displays for the ultimate in 3D entertainment. With these features and more, the EVGA GeForce GTX 570 Superclocked gives you more than one way to elevate your experience. Specifications include the GTX 570 (797MHz core clock) chipset, 1280MB of 0.5ns GDDR5 memory with a 3900 MHz effective memory clock and 156 GB/second memory bandwidth, 320 bit memory interface, 1594 MHz Shader Clock, 480 CUDA cores, 47.8 GT/s texture fill rate and PCI Express 2.0 compatibility. Additional features include Microsoft DirectX 11 Support, NVIDIA PhysX and NVIDIA PureVideo HD Technologies, NVIDIA 2-way and 3-way SLI readiness, NVIDIA 3D Vision Surround readiness, NVIDIA CUDA technology with CUDA C/C++, DirectCompute 5.0, and OpenCL support, PCI-Express 2.0 support and OpenGL 4.1 support. Connections are 1 Mini-HDMI 1.4a connector and 2 Dual-Link DVI-I HDCP capable connectors. Package includes the EVGA Driver/software disc with EVGA Precision Tuning utility, 1 Mini-HDMI to HDMI cable, 1 DVI to VGA adaptor, 2 6-pin PCI-E power cables and a limited lifetime warranty if registered within 30 days at www.evga.com.
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Saturday, November 5, 2011
Hard Disc Fundamentals
Abstract:
This article describes the main technical fundamentals of Hard Disc Drive and its operation. I focus my attraction on the particular perspective of describing Physical and Logical view of HDD, Reading and Writing in the HDD, How does data get stored in that and touched some information about HDD interfaces. This article also brings out the technology wise company working on this hard disc drives and this related technology.
Starting of HDD:
Hard disc drive, it is the magnetic device used to store soft copy of data in the form of 0's and 1's. Specific drivers are used to retrieve back the data in a specified format. Magnetic hard disks are used from 1956 onwards. On that day, the size of the hard disks is very huge for a small amount of storage and it also takes more time to store and retrieve. But today we are using very compact, high capacity, high latency hard disks for our systems.
Physical representation of HDD:
The user data / information are stored on a disc's surface media. The media is a specially coated surface. Each media surface is divided into tracks and sectors. These sectors are often called "blocks". Tracks are often referred to as cylinders. The Track, Sector separations of the hard disk are shown below. The Cylinder, Head, Sector (CHS) gives a physical location.
Logical representation of HDD:
Hard disks use circular hard platters to store data on. Each platter has two surfaces. Both sides of the media are used to store information. If each surface had 4 tracks and 4 sectors means there would be 32 sectors, or blocks. Each surface requires a "head" to read/write the information. Surfaces are often referred to as the "head". A cylinder is the area that a head can write to or read from without being positioned to another track.
Take a hard disk has two surfaces/head; four sectors/blocks then the logical representation of that disk will be like this figure 3. In that figure, the two heads of that disk represented as 0 and 1. The four cylinders/tracks and sectors are represented by 0 to 3. So for, each surface has 16 logical sectors/blocks that is named as Logical block Addressing (LBA).
The Host and the file system using this LBA only for HDD operation like reading, writing the data, searching and seek etc., But for heads and media, the hard disk driver circuits convert the LBA to CHS (Cylinder, Head, Sector).
Reading and Writing in HDD:
Hard Disk Drive is a digital data storage device that reads and writes data via magnetization changes of a magnetic storage disk. This includes one or more randomly accessible rotatable storage media, or disks. In a magnetic disk drive, the data is encoded as bits of information using magnetic field reversals grouped in tracks on the magnetic hard surface of rotating disks. It also includes a transducer supported by a hydrodynamic bearing which flies above each magnetic disk. The transducer head supported by an actuator arm is used to read data from or write data to the disks. Hard disk drives are an indispensable component in most modern computing/data handling systems.
Hard disk drives are commonly utilized to store relatively large amounts of data in today's computer systems like desk. If the capacity of the disk is more, the computer can store and access more data. In a computer, a hard disk drive is connected to the central processing unit (CPU) by means of the system bus. Computer architectures have a motherboard which includes a central processing unit and the system bus to which various peripherals, including a hard disk drive, are connected.
In a hard disk drive, data signals are read from and written to a rotating disk by a head, which is moved substantially with respect to the disk. The head assembly facilitates reading and writing of information on a surface of a rotating magnetic disk. The interconnect assembly includes a plurality of transmission elements, such as wires or traces, for transmitting data to and from the head assembly. The suspension assembly positions the head assembly at a generally constant distance away from the moving surface of the rotating disk. When the electric power is turned off to end the use of a computer, a driving voltage to a spindle motor also stops so that the speed of the hard disk rotated by the spindle motor gradually decreases. At this point, the magnetic head in the state of flying above the hard disk by the flow of air descends onto the surface of the hard disk.
The servo control system generally performs two distinct functions:
o Seek control
o Track following
The seek control function comprises controllably moving the actuator arm such that the transducer head is moved from an initial position to a target track position. The read/write head is typically a part of or affixed to a larger body that flies over the disk and is typically referred to as a slider. The slider has a lower surface referred to as the air-bearing surface. The air-bearing surface typically comprises one or more rails which generally generate a positive air pressure
The host sends the READ command to the hard disk, it gets transferred from logical to physical, then hard disk drive send back the specified block data to read. At the time of writing in the memory, the host sends the WRITE command to the HDD. After receiving the acknowledgement, the data is sent through the bus to write in the specified block.
HDD Interface:
A shared boundary between two, or more, functional units, defined by specific attributes, such as functional characteristics (Phases, states, protocol), common physical interconnection characteristics (cable, plugs), and signal characteristics (Polarity, voltage range, timing). This is called Interface. There are two main ways to interface the HDD with the host. They are,
ATA (Advanced Technology Attachment)
PATA (Parallel Advanced Technology Attachment)
SATA (Serial Advanced Technology Attachment)
SCSI (Small Computer System Interface)
ATA (PATA):
ATA is a common interface used in many personal computers before the emergence of SATA (Serial Advanced Technology Attachment). The initial version of ATA is a Parallel one. So after emergence of SATA, it is usually called as PATA (Parallel Advanced Technology Attachment). It is the least expensive of the interfaces used in the system in older days. PATA can support data transfer up to 133 MB/s. Nowadays SATA replaces this PATA in all areas. But the recent version UDMA133 is used in some subsystems depends upon the customer requirement.
SATA:
Serial Advanced Technology Attachment is commonly known as SATA. It is the very common hard disk interface used in all personal systems. One SATA port permits one device to connect to it. The main disadvantage of this is, it does not support the older systems without the use of additional components
SCSI:
It is abbreviated like Small Computer System Interface. SCSI is commonly used in servers, and more in industrial applications than home uses. It is the famous storage subsystem component used in all medium and small level computer interfaces. A mechanism called 'Cable Sharing' used here. It can support the data transfer rate up to 320 MB/s.
HDD - Enterprise Information:
In the Enterprise level, the companies are differentiated the hard disks using their spindle revolution per minute (RPM) like 4,200 RPM HDDs, 5,400 RPM HDDs, 7,200 RPM HDDs, 10,000 RPM HDDs, 15,000 RPM HDDs. These are all the main manufactures and companies have working with Hard Disk Drives and Marketing.
Audavi,Dane-Elec Memory, Dataslide, DTS, Dynamic Network Factory, EDGE Tech, Excelstor Technology, EZQuest Fantom Drives, Formation, Freecom Technologies, Fujitsu, Hitachi, Imation, I/OMagic, Iomega,LaCie, Maxell, Miltope,NEC, Olixir Technologies, PNY Technologies, ProStor Systems, Quantum, Samsung Electronics, SDK,Seagate, Shining Technology, Sony, SOYO, Toshiba,Verbatim, Western Digital
Hard Drive Failures:
Hard drive crashes are one of the most frustrating experiences with a computer. The inability to read data from the hard drive can render a computer useless. Even if the OS can run, the data may be inaccessible or damaged. The only way to recover from such a failure is to typically restore data from a backup onto a new drive with all the software installed from scratch. If no backup is available, then the data is either lost or will cost a lot for recovery services to retrieve.
Common drive failures
The most common failure for a hard drive is something called a head crash. A head crash is any instance where the drive head manages to touch a platter. When this happens, the magnetic media will be etched off of the platter by the head and render both the data and the drive head inoperable. There is no clean recovery from such a failure.
Another common failure comes from imperfections on the magnetic media. Any time that a sector on the disk fails to properly hold the magnetic alignment will cause data to be inaccessible.
Mobile systems tended to be prone to platters that shattered. This was due to the fact that most hard drive platters are made of glass and was susceptible to shock.
MTBF:
In order for consumers to get a good idea of the lifespan of a hard drive; a drive was rated by MTBF. This term stands for Mean Time Between Failure and is used to represent the length of time that 50 percent of drives would fail before and 50 percent would fail after. It is used to give an idea to a buyer as to the average amount of time the device will function for. The "Mean Time Between Failures" (MTBF) for hard disc drives had been going up fairly steadily from around 200,000 hours in the 1990's to nearly 1,200,000 hours today.
Recovery Software:
At the time of hard drive failures, user wants to recover all data from that failure hard disk. Various companies provide the recovery software for hard disk data recovery. Some of them would be free too.
Tuesday, November 1, 2011
PNY VCQ440NVS-PCIEX16-PB Quadro NVS 440 PCI Professional Graphic Card
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Post Date : Nov 01, 2011 15:27:40 | Usually ships in 1-2 business days

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PNY VCQ440NVS-PCIEX16-PB Quadro NVS 440 PCI Professional Graphic Card
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Thursday, October 27, 2011
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EVGA GeForce GT 520 1024 MB DDR3 PCI Express 2.0 2DVI/Mini-HDMI Graphics Card, 01G-P3-1526-KR
!±8±EVGA GeForce GT 520 1024 MB DDR3 PCI Express 2.0 2DVI/Mini-HDMI Graphics Card, 01G-P3-1526-KR
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Price : $50.14
Post Date : Oct 22, 2011 15:45:31
Usually ships in 1-2 business days

Whether you stream 1080p online videos from sites like YouTube or Hulu or prefer immersive Blu-Ray 3D movies, the power of the GeForce GT 520 GPU makes your video playback fast and smooth. In addition to rendering your high-res photos instantly, the EVGA GeForce GT 520 also speeds up the editing of your videos. And when you share your photos and videos online, you'll enjoy a richer web experience with GPU accelerated browsers like Google Chrome and Internet Explorer 9. Go beyond photos and videos and take your gaming to the next level. With the EVGA GeForce GT 520, your favorite DirectX 11 games come to life with lifelike characters and incredibly detailed terrain and game environments. Specifications include the GTX 520 (810 MHz core clock) chipset, 1024MB of DDR3 memory with a 1000 MHz Effective memory clock, 64 bit memory interface, 1620 MHz Shader Clock, 48 CUDA cores, 8 GB/sec memory bandwidth, 6.5 GT/s Texture Fill rate and PCI Express 2.0 compatibility. Additional features include Microsoft DirectX 11 Support, NVIDIA PhysX and NVIDIA PureVideo HD Technologies, Blu-ray 3D Support, NVIDIA CUDA technology with CUDA C/C++, DirectCompute 5.0 and OpenCL support, OpenGL 4.1 Support and PCI-Express 2.0 support. Connections are 1 Mini-HDMI 1.4a connector 1 Single-Link DVI-I HDCP capable connector and 1 Dual-Link DVI-I HDCP capable connector. Package includes the EVGA Driver/software disc and a 3 Year Limited Warranty if registered within 30 days at evga.com.
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