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Club3D X1800XT

Jan 24,2006 0

2. Features

 

Review Pages

1. Introduction
2. Features
3. A Closer Look
4. Test System
5. 3DMark2005
6. 3DMark2003
7. Codecreatures
8. Aquamark - 3DMark01
9. F.E.A.R.
10. Need For Speed - Most Wanted
11. Quake 4
12. Half Life 2
13. Far Cry
14. Ground Control II
15. Overclocking
16. Conclusion

 

Main Features
GPU ATI Radeon X1800XT - R520
Memory Brand/Model Samsung K4J52324QC-BJ12
Memory Type 512MB 256-bit GDDR3
Engine Clock Speed 600MHz
Memory Clock Speed 1.4GHz
Memory Bandwidth 48Gb/s
Pixel Shader Processors 16
Vertex Shader Processors 8
Fill Rate 10000Mp/s
Pixel Shader Support 3.0
Output 2 x DVI-I, 1 VIDEO
Bus PCI-E 16X
Process 90nm

The Club3D X1800XT is based on the new and long-awaited R520 core from ATI. It features 512MB of 1.2ns Samsung memory, which is the largest amount and fastest memory that can be currently found in a graphics card.

The R520 is a 16 Pixel shader processor chip, featuring 8 vertex shader processors, 16 texture address units, 16 texture units and 16 Render Back-End Units.

ATI rebuilt the R520 from scratch to bring to the core more features than previous products. First of all, the R520 along with all the X1000 series is based on a 90nm process technology to fit all the transistors on the new circuit. The pixel shader engine is now controlled by an "Ultra-threaded dispatcher", which dynamically assigns pixel shader operations to 4 individual quads of shader cores. Unlike the previous versions, the new ATI shader cores are now able to handle Shader Model 3.0 instructions just like all NVidia GPUs could since the GeForce 6 series.

Another X1000 innovation is the new memory controller architecture. To make things simple, instead of clients requesting for data directly from the memory controller, all communications is now made using tokens that roam around a ring surrounding the memory controller. Whenever a client needs to issue a request or the controller needs to send data, it alters one of the tokens. Although this technology is really borrowed from networking, it is very interesting to see it applied to graphics cards.

Click to enlarge

Finally, another nice change the R520 brought, regards cache memory. Instead of mapping each partition of the cache memory to specific partitions of the graphics memory, the cache can now hold data from any part of the memory without any restrictions.

Click to enlarge

 

Review Pages

1. Introduction
2. Features
3. A Closer Look
4. Test System
5. 3DMark2005
6. 3DMark2003
7. Codecreatures
8. Aquamark - 3DMark01
9. F.E.A.R.
10. Need For Speed - Most Wanted
11. Quake 4
12. Half Life 2
13. Far Cry
14. Ground Control II
15. Overclocking
16. Conclusion

 

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