Bargoed lept to the top of Division One East following a second successive bonus point victory over early leaders Llanharan.
Merthyr are level with Bargoed on points after they squeezed out the students of Uwic 37-34.
Blackwood moved up the table thanks to their 25-0 win at Newport Saracens while Newbridge also gained ground on the leaders after beating Beddau 27-19.
Caerphilly took maximum points with four tries in their 41-27 win over Rumney while Penallta beat local rivals Ystrad Rhondda 21-14. Ystrad remain bottom of the table.
Tonmawr romped to the day's biggest victory in Wales with a 78-7 win over hapless Carmarthen Athletic.
Wing Ryan Bayliss scored four in the 12-try rout though Tonmawr are still trailing the other Carmarthen club, Quins, who won the top of the table clash against Narberth 42-20 thanks to 22 points from full-back Gareth Cull.
Cwmllynfell beat Bonymaen 20-18 while Felinfoel also claimed a first win of the season, 13-5 against bottom side Dunvant.
Maesteg moved to fifth after beating Llangennech 24-14 and Whitland remained in touch with the leaders after a 14-10 success against Corus.