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POWERCOLOR RADEON HD 4770 REVIEW

"The Powercolor Radeon HD 4770 is compared to the HIS Radeon HD 3870. The Powercolor Radeon HD 4770 has 4% Lower Clock Speed, 30% Faster GDDR5 Memory and 320 Extra Shader Processors compared to HIS Radeon HD 3870. The only disadvantage the Powercolor Radeon HD 4770 has is the 128Bit Memory Interface. How will this effect the performance of the Powercolor Radeon HD 4770?"

POWERCOLOR RADEON HD 4770

POWERCOLOR RADEON HD 4770 INTRODUCTION

"The Powercolor Radeon HD 4770 has the ATI Radeon HD 4770 Graphics Engine Codename RV740 using 512MB GDDR5 Video Memory running at 3200Mhz. The Powercolor Radeon HD 4770 has a Engine Clock Speed of 750Mhz, 128bit Memory Interface and DirectX 10.1."

POWERCOLOR RADEON HD 4770 FEATURES

826 million transistors on 40nm fabrication process
PCI ExpressR 2.0 x16 bus interface
128-bit GDDR5 memory interface
Microsoft DirectXR 10.1 support
ShaderModel 4.1
32-bit floating point texture filtering
Indexed cube map arrays
Independent blend modes per render target
Pixel coverage sample masking
Read/write multi-sample surfaces with shaders
Gather4 texture fetching
Unified Superscalar Shader Architecture
640 stream processing units
Dynamic load balancing and resource allocation for vertex, geometry, and pixel shaders
Common instruction set and texture unit access supported for all types of shaders
Dedicated branch execution units and texture address processors
128-bit floating point precision for all operations
Command processor for reduced CPU overhead
Shader instruction and constant caches
Up to 160 texture fetches per clock cycle
Up to 128 textures per pixel
Fully associative multi-level texture cache design
DXTC and 3Dc+ texture compression
High resolution texture support (up to 8192 x 8192)
Fully associative texture Z/stencil cache designs
Double-sided hierarchical Z/stencil buffer
Early Z test, Re-Z, Z Range optimization, and Fast Z Clear
Lossless Z and stencil compression (up to 128:1)
Lossless color compression (up to 8:1)
8 render targets (MRTs) with anti-aliasing support
Accelerated physics processing
Dynamic Geometry Acceleration
High performance vertex cache
Programmable tessellation unit
Accelerated geometry shaderpath for geometry amplification
Memory read/write cache for improved stream output performance
Anti-aliasing features
Multi-sample anti-aliasing (2, 4, or 8 samples per pixel)
Up to 24x Custom Filter Anti-Aliasing (CFAA)
Adaptive super-sampling and multi-sampling
Gamma correct
Super AA (ATI CrossFireXconfigurations only)
All anti-aliasing features compatible with HDR renderin
Texture filtering features
2x/4x/8x/16x high quality adaptive anisotropic filtering modes (up to 128 taps per pixel)
128-bit floating point HDR texture filtering
sRGB filtering (gamma/degamma)
Percentage Closer Filtering (PCF)
Depth and stencil texture (DST) format support
Shared exponent HDR (RGBE 9:9:9:5) texture format support
OpenGL 3.0 support
ATI Avivo HD Video and Display Platform
Unified Video Decoder 2 (UVD) for H.264/AVC, VC-1, and MPEG-2 video formats
High definition (HD) playback of Blu-ray and HD DVD video2
Dual stream (HD+SD) playback support
DirectX Video Acceleration 1.0 and 2.0 support
Support for BD-Live certified applications
Hardware DivXand MPEG-1 video decode acceleration
AIT AvivoVideo Post Processor
Color space conversion
Chroma subsampling format conversion
Horizontal and vertical scaling
Gamma correction
Advanced vector adaptive per-pixel de-interlacing
De-blocking and noise reduction filtering
Detail enhancement
Color vibrance and flesh tone correction
Inverse telecine (2:2 and 3:2 pull-down correction)
Bad edit correction
Enhanced DVD upscaling (SD to HD)9
Automatic dynamic contrast adjusent
Two independent display controllers
Drive two displays simultaneously with independent resolutions
Full 30-bit display processing
Programmable piecewise linear gamma correction, color correction, and color space conversion
Spatial/temporal dithering provides 30-bit color quality on 24-bit and 18-bit displays
High quality pre- and post-scaling engines, with underscan support for all display outputs
Content-adaptive de-flicker filtering for interlaced displays
Fast, glitch-free mode switching
Hardware cursor
Two integrated dual-link DVI display outputs
Two integrated 400 MHz 30-bit RAMDACs
Each supports analog displays connected by VGA at all resolutions up to 2048x15362
HDMI output support
All display resolutions up to 1920x10803
Integrated AMD Xilleon HDTV encoder
Provides high quality analog TV output (component/S- video/composite)
Supports SDTV and HDTV resolutions
Underscan and overscan compensation
Seamless integration of pixel shaderswith video in real time
VGA mode support on all display outputs
ATI PowerPlay Technology6
Advanced power management technology for optimal performance and power savings
Performance-on-Demand
Constantly monitors GPU activity, dynamically adjusting clocks and voltage based on user scenario
Clock and memory speed throttling
Voltage switching
Dynamic clock gating
Central thermal management-on-chip sensor monitors GPU temperature
ATI CrossFireX Multi-GPU Technology7
Scale up rendering performance and image quality with two, three, or four GPUs
Integrated compositing engine
High performance dual channel bridge interconnect

POWERCOLOR RADEON HD 4770

POWERCOLOR RADEON HD 4770 SPECIFICATIONS

VIDEO CARD GPU CORE
CLOCK		 MEMORY
CLOCK		 MEMORY
TYPE		 MEMORY
INTERFACE		 SHADER
PROCESSORS		 DIRECTX
POWERCOLOR RADEON HD 4770 RV740 750 3200 512MB GDDR5 128 640 DX10.1
HIS RADEON HD 3870 RV670 780 2260 512MB GDDR4 256 320 DX10.1
VIDEO CARD GPU CORE
CLOCK		 MEMORY
CLOCK		 MEMORY
TYPE		 MEMORY
INTERFACE		 SHADER
PROCESSORS		 DIRECTX

POWERCOLOR RADEON HD 4770 REVIEW INDEX

PAGE 1 - POWERCOLOR RADEON HD 4770 INTRODUCTION
PAGE 2 - 3DMARK 2006
PAGE 3 - 3DMARK VANTAGE
PAGE 4 - FURMARK, LIGHTSPEED, RIGHTMARK AND UNIGINE HEAVEN
PAGE 5 - BATMAN ARKHAM ASYLUM, RESIDENT EVIL 5 AND FINAL RESULT

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