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Gigabyte GV-NX78X256V-B (GeForce 7800 GTX)
By Vincent Chang
Category : Graphics
Published by Vijay Anand on Thursday, 14th July, 2005
Rating : 4 out of 5 stars  


Time For A Price Adjustment?

It has been almost one month since the release of NVIDIA's next generation GeForce 7800 GTX graphics card. Originally intended to be tagged at USS$649, by the time of the actual launch, it was adjusted downwards to US$599. A quick check online however showed that some cards are already available for as low as US$540. And mind you, these are full retail versions from well-known vendors, not bland OEM cards. Therefore, it comes as no surprise that there have been rumors predicting a further price cut to US$499 within the next few weeks.

Whether or not these rumors will eventually turn out to be accurate, there is no doubt that NVIDIA has been getting pretty good yields for its silicon, such that it is able to deliver the product in such quantities. With variations of the GeForce 7800 series poised for release soon, NVIDIA is probably planning to reduce prices in order to better position the GeForce 7800 GTX (whose value proposition is already pretty good). While those who have bought the GeForce 7800 GTX may be feeling a bit disgruntled about the 'devaluation' of their cards (which is part and parcel of being an early adopter), this can only mean great news for those still waiting to take the plunge.

Therefore, this is also the appropriate time for prospective buyers to start reading reviews about the GeForce 7800 GTX cards offered by the different vendors, so that they can make an informed decision on which card is the right one. Although, the first batches of GeForce 7800 GTX cards offered by the vendors are mostly repackaged cards from NVIDIA, there are some differences between them, mostly in terms of the bundle and the default clock speeds. Today, we intend to get to the bottom of the GeForce 7800 GTX from one of the major manufacturers: the Gigabyte GV-NX78X256V-B.

Here is Gigabyte's take on the GeForce 7800 GTX.

Gigabyte GV-NX78X256V-B Technical Specifications
Graphics Engine
  • NVIDIA GeForce 7800 GTX GPU
    • Stock 2D GPU clock = 275MHz
    • Stock 3D GPU clock = 430MHz
  • NVIDIA CineFX 4.0 Shading Engine
    • Vertex Shaders
      • Support for DX 9.0 Vertex Shader 3.0
      • Displacement Mapping
      • Vertex Frequency Stream Divider (Geometry Instancing)
      • Infinite length vertex programs (supported in hardware)
    • Pixel Shaders
      • Support for DX 9.0 Pixel Shader 3.0
      • Full pixel branching support
      • Multiple Render Targets (MRTs)
      • Infinite length pixel programs (supported in hardware)
    • Texturing Engine Features
      • Accelerated textures access
      • Up to 16 textures per rendering pass
      • Support for 16-bit and 32-bit floating point formats
      • Support for sRGB texture format for gamma textures
      • DirectX and S3TC texture compression
    • Full 128-bit FP Precision Graphics Pipeline
      • Native support for 32 / 64 / 128 bits per pixel rendering modes
  • 64-Bit Texture Filtering and Blending
  • NVIDIA UltraShadow II Technology (accelerates shadow computations)
  • NVIDIA SLI Technology
  • NVIDIA Intellisample 4.0 Technology
    • 16x Anisotropic Filtering
    • Adaptive Texture Filtering
    • Gamma-adjusted Rotated Grid Antialiasing
    • Transparent multisampling and supersampling modes
    • Fast antialiasing and compression performance
    • Loss-less Color, Texture and Z-Data Compression algorithms (in real time)
    • Fast Z-clear
    • Support for normal map compression
  • NVIDIA PureVideo Technology
    • Dedicated programmable on-chip video processor
    • MPEG-2 video encode and decode
    • High Definition MPEG-2 and WMV9 hardware decode acceleration (up to 1080i)
    • Post Processing Features
      • Spatial-Temporal De-Interlacing (adaptive)
      • NTSC 3:2 Pulldown / Bad Edit correction
      • PAL 2:2 Pulldown correction
    • High quality 4x5 video scaling and filtering
    • Microsoft Video Mixing Renderer (VMR)
    • Integrated HDTV output (with HDCP support)
  • Composited Desktop Hardware Engine (for Windows Longhorn)
  • Advanced Video and Display Functionality
    • Dual 400MHz RAMDACs that support resolutions of 2048x1536@85Hz
    • Dual DVO ports for interfacing external TMDS transmitters and external TV/HDTV encoder
    • nView Multi-display Technology
  • NVIDIA Digital Vibrance Control (DVC) 3.0
  • Designed for PCI Express x16
  • Advanced thermal monitoring and thermal management
Graphics Memory
  • 256-bit memory interface
  • 256MB Graphics DDR3 SDRAM
  • Default clock rate of 600MHz (effective speed of 1200MHz DDR)
  • 38.4GB/sec Peak Memory Bandwidth
Display Capabilities
  • Dual 400MHz RAMDACs that support resolutions of 2048x1536@85Hz
  • Integrated dual TMDS transmitters (DVI 1.0 compliant and HDCP ready)
Connectors
  • 1x mini-DIN connector (for Video-out)
  • 2x DVI-I connector (for Digital Flat Panel displays, compatible with analog displays with converter)
Drivers & Software
  • Driver support for Microsoft Windows 9x/ME/2000/XP/XP MCE/XP Pro x64, Linux and Macintosh OS (including OS X)
  • CyberLink PowerDVD 6.0
  • CyberLink PowerDirector 3.0ME
  • Joint Operations: Typhoon Rising
  • Xpand Rally
Other Information
  • PCI Express x16 slot required
  • Adjacent expansion slot to be kept free preferably
  • Dedicated 6-pin PCIe Molex power connector required (not shared or split)
  • Power supply rated for 350W or higher recommended by NVIDIA (500W PSU for SLI setup)

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