I'm struggling with the business sense of this. If Ryzen is a competent chip it will erode Intel's market share, slowly admittedly. Why invest in your only competitor who may have something good going on?
Unless it's a simple case of Intel throwing money at AMD so it can concentrate more on CPU design and stop wasting R&D on iGPU.
Hmm.... Need more info before chin rubbing starts.
IF, and this is a huge IF, this is true, I guess the logic behind this goes like this.
AMD has 10% of the market. Even if Ryzen was much faster than Kaby Lake, and it isn't, Intel's influence and brand recognition would be enough to keep Ryzen at one quarter of the market, best case scenario. We saw something like that 12 years ago with Athlon64 vs Pentium 4.
So, why fight to go from 10% to 25%, when you can get payed for the other 75%-90% of the market? OK maybe you will not go to that 25% and stay at 15%-20%, but the income from selling GPUs to Intel will be significant, probably much higher than what AMD will make from an extra 5%-10% of the midrange market where APUs will be playing ball.
Then there are other areas where AMD will gain. We already have seen AMD's gains from the consoles. It wasn't money, but the changes in game development.
The consoles where enough to change the game market. Nvidia tried with PhysX and GameWorks, but it couldn't stop the console ports tsunami. So, while games in the past where written for Nvidia hardware, something that was catastrophic for AMD, in driver's stability and performance, now they are written and optimized for GCN. The results can be seen this last year, with AMD cards not only continuing in gaining against Nvidia's cards in benchmarks, but also Nvidia having problems with it's driver's stability. Not to mention DX12 and Vulkan.
With Intel going GCN, GCN becomes like the x86 for graphics cards. Nvidia's next architecture should be a marvel of engineering for developers to not ignore it. Not to mention that FreeSync and other AMD techs will become the de facto standards over night.
Nvidia is a threat to both AMD and Intel. But mostly Intel, because Intel is the huge company here, Intel is the company that will lose the most. An alliance between AMD and Intel to throw out Nvidia of the desktop market, will benefit both tremendously. In the future the war between ARM and x86 platforms will only intensify and Nvidia can become a huge asset for the ARM camp, both in the gaming market and the AI market. If AMD and Intel manage to limit Nvidia's expansion, or even more, manage to turn Nvidia's fast growth to a recession, they will have better chances to defend against the ARM platform.