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ATI RADEON HD 4870 512MB Graphic Card Review

Written by Administrator, on 16-07-2008 01:17

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Last time RADEON HD 4850 in games tested. Now we got hold of the higher-end HD 4870 with GDDR5 memory. Even though it has the same architecture and the same number of processing units, we decided to compare it to GeForce GTX 260, its competitor in terms of price.

RADEON HD 4870

Codename: RV770-2
Process technology: 55 nm
956 million transistors
Unified architecture with an array of common processors for streaming processing of vertices and pixels, as well as other data
Hardware support for DirectX 10.1, including new Shader Model 4.1, geometry generation, and stream output
256-bit memory bus: four 64-bit controllers supporting GDDR3/GDDR5
Core clock: 750 MHz
10 SIMD cores, including 800 scalar floating-point ALUs (integer and floating-point formats, support for FP32 and FP64 in compliance with IEEE 754)
10 enlarged texture units supporting FP16 and FP32 formats
40 texture address units
160 texture fetch units
40 bilinear filtering units that can filter FP16 textures at full speed, trilinear and anisotropic filtering for all texture formats
Dynamic branching in pixel and vertex shaders
16 ROPs supporting antialiasing with programmable sample patterns (over 16 samples per pixel), including FP16 or FP32 formats of the frame buffer. Peak performance is up to 16 samples per cycle (including MSAA 2x/4x and FP16 buffers), 64 samples per cycle in Z only mode
Writing results up to eight frame buffers simultaneously (MRT)
Integrated support for two RAMDACs, two Dual Link DVIs, HDMI, HDTV, DisplayPort

RADEON HD 4870 Specifications

Core clock: 750 MHz
Unified processors: 800
40 texture units, 16 blending units
Effective memory frequency: 3600 MHz (4*900 MHz)
Memory type: GDDR5
Memory: 512 MB
Memory bandwidth: 115 GB/sec
Maximum theoretical fillrate: 12.0 gigapixel per second
Theoretical texture sampling rate: 30.0 gigatexel per second
2 x CrossFireX connectors
PCI Express 2.0 x16 bus
2 x DVI-I Dual Link, 2560x1600 video output
TV-Out, HDTV-Out, support for HDCP, HDMI, DisplayPort
Power consumption: up to 160 W (two 6-pin connectors)
Two-slot design
Recommended price: $299

See the reviews at digit-life

Keywords : GDDR5 Graphic Card, HD4870 Review, His Radeon HD 4870

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