Ebbw Vale will go into this match with a spring in their step, having dispatched with Llanelli 20-8 in their Welsh Premiership opener. Hooker Leyton Phillips will lead out the side.
Meanwhile Bridgend, who will be looking to build on their 13-12 win over Newport last weekend, have named a side showing four changes for their clash with Caerphilly at the Brewery Field.
The changes are all in the pack, Nathan Budgett and Ryan Jones form a new-look second row duo, while Chris Horsman comes in at tighthead and Maama Molitika starts at No.6.
Caerphilly went down 20-19 to Swansea last week, are still winless with three defeats from three games played so far in this competition.
Cardiff: 15 Donavan van Vuuren, 14 Anthony Sullivan, 13 Nick Walne, 12 Matt Allen, 11 Dean Dewdney, 10 Nick Robinson, 9 Ryan Powell, 8 Emyr Lewis, 7 Martyn Williams (captain), 6 Dan McShane, 5 John Tait, 4 Adam Jones, 3 Kenneth Fourie, 2 Greg Woods, 1 Tim Payne.
Replacements: 16 John Yapp, 17 Lewis Collins, 18 Luke Tait, 19 Dan Baugh, 20 Richard Smith, 21 Iestyn Harris, 22 Rhys Williams.
Ebbw Vale: 15 Richard Davies, 14 Nick Wakley, 13 Rhys Shorney, 12 Ed Binham, 11 Andrew Bevan, 10 Scott Mitchell, 9 Bryan Shelbourne, 8 Kati Tuipolotu, 7 Rhys Williams, 6 Chay Billen, 5 Neil Edwards, 4 Ockert Booyse, 3 Martin Jones, 2 Leyton Phillips (captain), 1 Adam Black.
Replacements: 16 Damien Penisini, 17 Jonathan Evans, 18 Peter Sidoli, 19 Will Thomas, 20 Tyron Morris/Paul Williams, 21 Mark Meenan, 22 Aaron Takarangi.
Bridgend: 15 G Cull, 14 A Havili, 13 D Bishop, 12 G Thomas (captain), 11 R Mustoe, 10 S Mannix, 9 H Harries, 8 C Harris, 7 R Bryan, 6 M Molitika, 5 N Budgett, 4 R Jones, 3 C Horsman, 2 G Williams, 1 P Booth.
Replacements: 16 B Phillips, 17 C Loader, 18 G Thomas, 19 O Lloyd, 20 D Jones, 21 C Warlow, 22 S Martens.
Caerphilly: TBC.
Both matches Kick-off at 14.30 GMT
