Gigabyte GV-NX78T256V-B 7800GT



The big headlines in today's video card related articles almost always come down to seeing double; whether it's two NVIDIA GeForce cards connected in SLI or two ATi Radeons running in CrossFire mode.  Perhaps it's justified in that people always want to see higher framerates and increased performance, regardless of the cost.  Just look back at what they did to our pal, Steve Austin.  When they "rebuilt" the Six Million Dollar man, they didn't just give him the powers of an everyday man.  They made him "faster, stronger, better". 

While those kind of articles always make for exciting reading, the average PC user knows that at the end of the day, their purchases are going to invariably fall in below these heady systems that get all the fanfare.  It's simply not feasible to consistently upgrade to the fastest or most powerful hardware on a semi-regular basis for most enthusiasts.  So today, we're not looking at dual-core, dual-GPU monster machines, but instead a powerful video card from Gigabyte, that hummed right through our benchmark suite.  We present the Gigabyte GV-NX78T256V-B...

Gigabyte GV-NX78T256V-B Specifications
A card for the masses
Core GPU Clock - 405MHz
256MB - GDDR3 Memory @ 1 GHz (500MHz DDR)

NVIDIA CineFX 4.0 Shading Architecture
_Vertex Shaders
_Support for Microsoft DirectX 9.0 Vertex Shader 3.0
_Displacement mapping
_Geometry instancing
_Infinite length vertex programs
_Pixel Shaders
_Support for DirectX 9.0 Pixel Shader 3.0
_Full pixel branching support
_Support for Multiple Render Targets (MRTs)
_Infinite length pixel programs
_Next-Generation Texture Engine
_Accelerated texture access
_Up to 16 textures per rendering pass
_Support for 16-bit floating point format and 32-bit floating point format
_Support for non-power of two textures
_Support for sRGB texture format for gamma textures
_DirectX and S3TC texture compression

_Full 128-bit studio-quality floating point precision through the entire rendering pipeline with native hardware support for 32bpp, 64bpp, and 128bpp rendering modes

API Support
• Complete DirectX support, including the latest version of Microsoft DirectX 9.0 Shader Model 3.0
_Full OpenGL support, including OpenGL 2.0

64-Bit Texture Filtering and Blending
_Full floating point support throughout entire pipeline
_Floating point filtering improves the quality of images in motion
_Floating point texturing drives new levels of clarity and image detail
_Floating point frame buffer blending gives detail to special effects like motion blur and explosions

NVIDIA Intellisample 4.0 Technology
_Advanced 16x anisotropic filtering (with up to 128 Taps)
_Blistering- fast antialiasing and compression performance
_Gamma-adjusted rotated-grid antialiasing removes jagged edges for incredible image quality
_Transparent multisampling and transparent supersampling modes boost antialiasing quality to new levels
_Support for normal map compression
_Support for advanced lossless compression algorithms for color, texture, and z-data at even higher resolutions and frame rates
_Fast z-clear

NVIDIA UltraShadow II Technology
_Designed to enhance the performance of shadow-intensive games

NVIDIA Digital Vibrance Control (DVC) 3.0 Technology
_DVC color controls
_DVC image sharpening controls

NVIDIA SLI Technology
_Patented hardware and software technology allows two GPUs to run in parallel to scale performance
_Scales performance on over 60 top PC games and applications
NVIDIA PureVideo Technology
_Adaptable programmable video processor
_High-definition MPEG-2 and WMV9 hardware acceleration
_Spatial-temporal de-interlacing
_Inverse 2:2 and 3:2 pull-down (Inverse Telecine)
_4-tap horizontal, 5-tap vertical scaling
_Overlay color temperature correction
_Microsoft Video Mixing Renderer (VMR) supports multiple video windows with full video quality and features in each window
_Integrated HDTV output

Composited Desktop Hardware Engine
_Video post-processing
_Real-time desktop compositing
_Accelerated antialiased text rendering
_Pixel shader-driven special effects and animation

Advanced Display Functionality
_Dual integrated 400MHz RAMDACs for display resolutions up to and including
2048x1536 at 85Hz
_Dual DVO ports for interfacing to external TMDS transmitters and external TV encoders
_Full NVIDIA nView multi-display technology capability

Advanced Engineering
_Designed for PCI Express x16
_Designed for high-speed GDDR3 memory

Operating Systems
_Windows XP/Windows XP 64
_Windows ME
_Windows 2000
_Macintosh OS X

Software Bundle
_SpellForce - The Order of Dawn
_Xpand Rally
_Power Director 3
_Gigabyte Driver CD

Adapter/Cable Bundle
_VIVO cable w/ breakout box
_DVI adaptor
_Power cord



The GV-NX78T256V-B is one of Gigabyte's latest video cards powered by an NVIDIA GPU, the 7800 GT.  The 7800GT differs from the 7800GTX by having four fewer pipelines and one less vertex shader, as well as having core and memory speeds that are typically about 30MHz slower for the GPU and 100MHz for the memory, when comparing NVIDIA's reference specifications. There doesn't seem to be any way to "turn on" those extra pipelines just yet, so if you want the extra bandwidth you'll need to pay the price for the GTX model. However, the lower price point of the 7800GT has made it a prime candidate for SLI users.  Buying two 7800GTs over two 7800GTXs can often result in a savings close to $200 dollars.   Keeping with our theme of keeping costs down, we've only included single card performance on the pages to come, comparing the 7800GT to the card it supplanted, the 6800GT, as well as one from the competitors: ATi's Radeon X850XT.

Tags:  Gigabyte, GT, 7800, 780

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