The RADEON X1300 variants/competitive comparison
For the RADEON X1300, ATI takes much of the underlying technology found in the X1600, and scales it down even further to reduce manufacturing costs.
The key cuts come to the pixel and vertex shaders, which have been reduced in number from 12 pixel shaders in the X1600 to four in the RADEON X1300, and from five vertex shaders to two in the RADEON X1300.
Since it boasts lower clock speeds, ATI also removes the X1600ís ring bus, opting instead for a more traditional hub/spoke architecture. The X1300ís memory controller can support 32-bit, 64-bit, and 128-bit memory interface configurations, providing more flexibility to ATIís board partners.
The RADEON X1300 has the same 128-thread cap for handling shaders as the RADEON X1600, and continues to support such features as 3Dc and ATIís adaptive and temporal AA modes.
Note the copper cooling
Spartan board design on this X1600 XT
The RADEON X1300 PRO reference board
RADEON X1300 SKUs
ATI has announced three RADEON X1300 variants to date. At the top of the lineup is the RADEON X1300 PRO. The X1300 PRO features a 600MHz graphics core, and is paired with 256MB of memory running at 400MHz (800MHz effective). The X1300 PRO carries a $149 price tag.
In the middle of the X1300 lineup is the RADEON X1300. The X1300 features a 450MHz graphics core and can be paired with 128MB or 256MB of memory running at 250MHz (500MHz effective). The 128MB board lists for $99, while the 256MB card carries a $129 price tag officially.
Finally, at the bottom of the X1300 line is the RADEON X1300 HyperMemory. Like the RADEON X1300, the X1300 HyperMemory ships with a 450MHz graphics core, only its memory runs at 500MHz (1GHz effective). ATI opted to ship the board with really fast memory, in exchange the X1300 HyperMemory only ships with 32MB of onboard memory, utilizing the PCI Express interface to access your systemís memory.
Both the X1600 and X1300 support ATIís Avivo technology, as well as CrossFire. ATI will provide CrossFire Master cards for the RADEON X1600 eventually, while two X1300 cards can be combined together for CrossFire operation, as the X1300 uses the PCI-E interface to transfer data between the two cards rather than ATIís compositing engine.
|Mainstream Card Comparison|
|Card||Memory Interface||Memory Clock Speed (MHz)||Core Clock Speed||Pixel Shader Pipelines||Vertex Shading Units||Peak Texel Fill Rate||Peak Memory Bandwidth||Official MSRP|
|RADEON X1600 XT||128-bit GDDR3||690MHz||590||12||5||7080||22.1GB/sec||$249|
|RADEON X1300 PRO||128-bit GDDR3||400MHz||600||8||4||2400||12.8GB/sec||$149|
|GeForce 6800||256-bit DDR1||350MHz||325||12||5||3900||22.4GB/sec||$200|
|RADEON X800||256-bit GDDR3||350MHz||400||12||6||4800||22.4GB/sec||N/A|