Apple may be switching back to NVIDIA for the upcoming Mac Pro’s primary GPU, according to an anonymous source speaking with MIC Gadget. The new Mac Pros will reportedly feature Intel’s upcoming Ivy Bridge chipset, which features 22 nanometer transistor technology and is more efficient than the previous Sandy Bridge processors. The site also suggests that the Cupertino-based company has been testing new processors with 8 cores and 20MB of cache. The overheating issues that have plagued previous models have been solved thanks to the 30% increase in heat dissipation efficiency afforded by Intel’s new chips. For graphics in the new Mac Pro, Apple has reportedly chosen NVIDIA’s “Kepler” platform, which is set to be released around the same time as Intel’s new CPUs. Apple is expected to launch its refreshed Mac Pro line in the third quarter this year, MIC Gadget stated.