So, what do you mean? New FX-9370 and old motherboard? It be working? Yes!
Im use for benchtable old and good one
Asus Crosshair V Formula. This is really the solid board I think Asus make the best boards for AM3+. Cooling in all setups was AMD Allinone Cooler (Antec 920). Ambients between 20-22 C.

My FX-9370 is 1311PGN batch. This chip impressed me at begining but not all is so clear...
I began with Cinebench R11.5 at 4940 MHz. What this chip can do?
1.44V no problem...

1.42V? OK!

1.355V!! 4940 MHz

Cinebench R15 is a bit harder for CPU, I must jumped a bit with voltage

X264FHD benchmark with 4940 MHz and 2600+ CPUNB.

Impossible...CU4 is very bad and higher volts helps not much :-(. This CU4+temps kills all potential of this CPU..After few minutes of test I got hardware error.
With higher CPUNB clocks is CPU more sensitivity for volts, need more juice, limit is near 2800 MHz with 1.35V CPUNB
Usually, CPUNB 100 MHz lower help in CPU clocks. Cinebench at
5066MHz/2635MHz CPUNB
With this frequency I tried more benchmarks:
3D Fire Strike

3D Cloud Gate

3D Mark11

Fritzchess benchmark, easy over 16 000 points

Cinebench R11.5

Wprime 32M and 1024M
The maximumCinebench R11.5 at 5143 MHz

Superpi 32M test1 at 5262 MHz

Superpi 32M test2 at 5397 MHz

Superpi 1M at 5470 MHz!

Max validation, the best was CU1 (core 0+1) and worst last one CU4. CU3 was similar as CU1.
5647 MHz
hmmm, unvalid try.
5675 MHz (as always 1.555V as my maximum)
Who knows me, knows me ;)....AMD 3000+, AMD x2 4600+ EE, AMD X4 955 BE C2,2x AMD X4 965 BE C3, AMD X4 970 BE C3, AMD x4 975 BE, AMD x4 980 BE, AMD X6 1090T BE, AMD x6 1100T BE, 2x AMD FX-8120, 2x AMD FX-8150, FX-6300, FX-8300, FX-8320E, FX-8320, FX-8350, FX-8370, FX-8370E, FX-9370, FX-9590, AMD A8-3850, AMD A8-3870K, A8-5600K, A10-5800K, A10-6800K, A10-7850K, A10-7870K, A 5150, Athlon x4 860K, Intel i7-5960X, i7-6700K, Intel i7-4770K, Intel i7-980x, Intel i7 2600k, Intel i7-3770K, i7-3930K.