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 X1600’s ring bus, opting instead for a more traditional hub/spoke architecture. The X1300’s memory controller can support 32-bit, 64-bit, and 128-bit memory interface configurations, providing more flexibility to ATI’s 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 ATI’s 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 system’s memory.

Both the X1600 and X1300 support ATI’s 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 ATI’s 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