They've paired the i5 4690 against an FX 4350, likely because they don't have the hardware to test on older Intels. The is 4690 is a *MUCH* faster chip than an FX 4350. Pairing the one against the other makes no sense, yet they're both minimum spec.
The 2500k should be fine as it's a better chip than the FX 4350 just as well.
https://cpu.userbenchmark.com/Compare/Intel-Core-i5-2500-vs-AMD-FX-4350/m517vs2880
