CAT

Yes, SBI PO and CAT preparation can go hand in hand.
Take a look at CAT syllabus:
CAT Syllabus - Complete Details of Quantitative Aptitude, Data Interpretation, Logical Reasoning, Verbal Aptitude, and Reading Comprehension
Here goes the details about SBI syllabus:
The topics in the second image have to be prepared isolated for SBI PO.
The general awareness topics mentioned for SBI would not suffice for CAT. GK knowledge for an MBA aspirant needs to be way higher than SBI PO.
SBI PO 2016 syllabus and pattern:
Take a deep understanding on CAT and SBI pattern and the possible number of questions under every topic. Prepare hard for CAT you would be able to crack SBI PO, excluding the technical part.
Wish you all success.

CAT is conducted by the Indian Institutes of Managements (IIMs) ans every year one or other IIM conducts it. CAT 2017 notification will be released on last week of July 2017. CAT is required for admission in to any IIMs and also accepted by many B school. CAT 2017 is likely to be conducted in the first week of December, 2017. In terms of exam pattern, it is one of the most dynamic tests which changes almost every year depending on the discretion of the exam conducting authorities. Around 4,000 seats are offered through the 20 IIMs. CAT is the biggest national level MBA entrance test is taken by more than 2 lakh candidates every year. eligibility criteria: any graduate with minimum 50 percent mark those in final year without any backlog in previous exam may also apply. registration to be done online and check newspaper advt during end of July.