In terms of overall gaming performance, the graphical capabilities of the Intel 865G are very slightly better than the Nvidia GeForce 6150 SE 256MB.

The 6150 SE was released over three years more recently than the 865G, and so the 6150 SE is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the 865G 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 6150 SE has 240 MB more video memory than the 865G, so is likely to be slightly better at displaying game textures at higher resolutions. This is supported by the fact that the 6150 SE also has superior memory performance overall.

The memory bandwidth of the 865G and the GeForce 6150 SE 256MB are the same, which means the 865G and the 6150 SE have equal limitations when it comes to graphical data transfer.

The 6150 SE has 2 Shader Processing Units but the 865G does not have an entry, so the two GPUs cannot be reliably compared in this area.

The 865G requires 13 Watts to run but there is no entry for the GeForce 6150 SE 256MB.