In terms of overall gaming performance, the graphical capabilities of the AMD Radeon X1300 256MB are marginally better than the AMD Radeon 9500.
The Radeon X1300 256MB was released over three years more recently than the Radeon 9500, and so the Radeon X1300 256MB is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the Radeon 9500 when running the latest games.
Both GPUs exhibit very poor performance, so rather than upgrading from one to the other you should consider looking at more powerful GPUs. Neither of these will be able to run the latest games in any playable way.
The Radeon X1300 256MB has 128 MB more video memory than the Radeon 9500, so is likely to be slightly better at displaying game textures at higher resolutions. However, overall, the Radeon 9500 has superior memory performance.
The Radeon 9500 has 0.3 GB/sec greater memory bandwidth than the Radeon X1300 256MB, which means that the memory performance of the Radeon 9500 is marginally better than the Radeon X1300 256MB.
Both the Radeon 9500 and the Radeon X1300 256MB have 4 Shader Processing Units. The two GPUs are based on different architectures, but deliver an equivalent shader performance. To compare, we must continue to look at the memory bandwidth, Texture and Pixel Rates. In this case, we sadly do not have enough data in this area to complete the comparison.
We would recommend a PSU with at least 350 Watts for the Radeon X1300 256MB, but we do not have a recommended PSU wattage for the Radeon 9500.
The Radeon R300 (introduced August 2002) is the third generation of Radeon graphics chips from ATI Technologies. The line features 3D acceleration based upon Direct3D 9.0 and OpenGL 2.0, a major improvement in features and performance compared to the preceding Radeon R200 design. R300 was the first fully Direct3D 9-capable consumer graphics chip. The processors also include 2D GUI acceleration, video acceleration, and multiple display outputs. R300 refers to the development codename of the initially released GPU of the generation. R300 and its derivatives would form the basis for ATI's consumer and professional product lines for over 3 years.
The integrated graphics processor based upon R300 is called Xpress 200.
Radeon X1300 256MB is an entry-level GPU based on the 90nm variant of the R500 architecture.
It's based on the RV515 Core and offers 4 Pixel Shaders, 4 TMUs and 4 ROPs, on a 128-bit of standard DDR. The central unit runs at 450MHz and the memory clock operates at up to 250MHz.
Radeon X1300 is not much more powerful than R300 and R400 based Radeon X1050 GPUs and so its performance is relatively limited - even for DirectX 9 based games. As it's not based on a Shader-Unified architecture, both DirectX 10 & 11 games aren't supported.