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Sapphire Radeon HD4850 X2 2048MB Graphics Card
Author: Jason Kohrs
Manufacturer: Sapphire
Source: Sapphire
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Sapphire Radeon HD4850 X2 2048MB Graphics Card
November 06, 2008

Sapphire is back again with another specialty graphics card based on a high end ATI Radeon GPU. The newly released Sapphire Radeon HD4850 X2 2048MB graphics card incorporates a pair of Radeon HD4850 graphics processors and 2048MB of GDDR3 memory on a custom PCB to create one serious looking piece of equipment. The promotional image below shows the card in question, and in this review we'll take a closer look to see how it compares to some other high end cards in the Radeon family.

Before getting into the heart of the review, let's take a look at some published data on the Sapphire Radeon HD4850 X2 2048MB. The bullet points below cover some of the key items, and for a complete list of features and specifications, please visit the official product page on the Sapphire website.


2 GB of GDDR3 memory
2.0 TeraFLOPS of GPU power
DirectX 10.1 support
PCI Express 2.0 support
1600 stream processing units
2 x 256-bit memory interface
24x custom filter anti-aliasing (CFAA) and high performance anisotropic filtering
Dual mode ATI CrossFireX multi-GPU support for highly scalable performance
Dynamic geometry acceleration & DVD Upscaling
Game physics processing capability & Dynamic Contrast
ATI Avivo HD video and display technology
Dynamic power management with ATI PowerPlay technology
Unified Video Decoder 2 (UVD 2) for Blu-ray and HD Video
Accelerated Video Transcoding(AVT)
Built-in HDMI with 7.1 surround sound support


Display Output: Dual DL-DVI-I+HDTV
Core Clock: 625 MHz
Stream Processors: 2 x 800
Memory Clock: 993MHz, 1986 Mbps
PCI Express 2.0 x16 bus interface
2x 1024MB / 2x256bit GDDR3 memory interface
Dual Slot Dual Fan Active Cooler with Fan Speed Control
HDMI compliant via dongle
7.1 Audio Channel Support
Microsoft DirectX 10.1 support
Shader Model 4.1 support

The core and memory clock speeds are both set to the reference Radeon HD4850 settings, but the obviously appeal is that you have the horsepower of two cards on a single PCB. Each graphics processor has 1024MB of memory to work with, and the theoretical bandwidth is double what you would get with just one card.

While this Radeon HD4850 X2 offers high end features and specifications, it is not the top of the line since there are Radeon HD4870 X2 cards available from Sapphire and a few other manufacturers. The Radeon HD4850 X2 costs a good deal less than its "big brother" (roughly $400 versus $550), and is intended to compete with NVIDIA based cards in terms of performance and price.

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