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NVIDIA GeForce 7800 GTX Review

NVIDIA today unveiled their new GeForce 7800 GTX that brings Shader Model 3.0 to the next level. Lets see if it will live up to its expectations of up to 2x shader performance. Included in the review are some interesting findings for 3DMark2005.

NVIDIA is on the dock again to unveil their next generation GPU
architecture codenamed G70 this time round, delivering their promise to release
a new GPU architecture every year. NVIDIA has gained an edge over ATI by
delivering not just a new GPU architecture into the market but also delivering
the its partners products into the retail front on the day of launch. It is one
of the fastest time to market that NVIDIA has ever executed where time to market
and market availability is the key to generating sales and profits. NVIDIA has
been reaping good sales and profits from their desktop GeForce 6 series based on
NV4x architecture ever since the launch last year and is hoping to set a winning
streak yet again.

Who could imagine where just two years back, NVIDIA is facing
numerous issues with their NV3x products that leads to their late delivery into
the market and also facing immense pressure from ATI with their fine R3xx
architecture. As a result, much of its high-end desktop market share was lost to
ATI since then till NVIDIA fight back with their GeForce 6800 series. It is the
first and only GPU in the market that supports Shader Model 3.0 which has slowly
been gaining popularity among the game developers to enable SM 3.0 features set.
Most importantly, gamers love it as SM 3.0 brings performance advantage and some
image quality improvements in popular games such as Far Cry and SplinterCell
Chaos Theory.

NVIDIA today unveiled their new GeForce 7800GTX that brings
Shader Model 3.0 to the next level with its CineFX 4.0 Shading Architecture.
NVIDIA is also emphasizing on the fact that their SLI technology is gaining
momentum and even more so today with their 7800GTX which bring SLI performance
to a all new high especially it is relatively easy to find nForce 4 SLI
motherboards for both AMD and Intel processors out there in the market. We will
be going through some key enhancements of the G70 as opposed to the NV45 and we
will see if it will live up to its expectations of delivering up to 2x shader
performance of the NV45. More importantly, we will check out its performance on
some of the latest games out there and even more interesting findings when the
7800GTX cards run in SLI.

GeForce 7800GTX Specs at a glance

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

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® 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
2048×1536 at 85Hz
• Dual DVO ports for interfacing to externa l TMDS transmitters and external TV
• Full NVIDIA® nView® multi-display technology capability

NVIDIA® Digital Vibrance Control™ (DVC) 3.0 Technology

• DVC color controls
• DVC image sharpening controls

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