Ole Gunnar Solskjaer has told his trio of high-profile signings there will be no time for a honeymoon period at Cardiff.
Wilfried Zaha completed his loan switch from Manchester United on Friday, while Fabio had made his move from Old Trafford earlier in the week.
Kenwyne Jones has also arrived at the Cardiff City Stadium, as part of an exchange deal that saw Peter Odemwingie head to Stoke.
The trio are set to make their debuts in Saturday's clash with Norwich, a match the Bluebirds can hardly afford to lose as they sit bottom of the Premier League table.
Solskjaer is positive about his new recruits but admits a run of seven league games without a win means his new men have to deliver from the off.
He said: "There is no honeymoon period when you come into the thick of it. We expect them and want them to perform straight away.
"The players I have got in all give us something different and something that can make a difference, a presence in the box and enthusiasm. Together they complement my squad.
"We have really had a tough month but I have seen some great development in the month. We played some very nice football at Manchester United and the new boys might have been what we were lacking."
Solskjaer had particular praise for Zaha.
The 21-year-old joined United from Crystal Palace but made just four appearances under David Moyes this season.
But Solskjaer does not feel the wide man's struggles at Old Trafford mean he has to prove himself at Cardiff.
''He has pace, power, technical ability and goes past people. He will give us that extra change of tempo in the final third, where we really need it," he said.
''He will bring that little final bit to find pockets of space and produce a bit of magic.
''I don't think he has something to prove, he wants to play.'
''He played a few games at United, but maybe not what he hoped for when he went there.
''He wants to play, to play with confidence and keep Cardiff in the Premier League.''
Solskjaer has brought in six players in January, having added the Norwegian trio of Magnus Wolff Eikrem, Mats Moller Daehli and Jo Inge Berget earlier in the month.
In terms of outgoings, Craig Conway has joined Blackburn while Etien Velikonja has moved to Rio Ave on loan.
Andreas Cornelius also looked to be heading through the exit door after an uninspiring spell in south Wales.
Cardiff paid £8million for the 20-year-old in the summer, but he failed to score a first-team goal and was likely to return to Copenhagen in a cut-price deal worth £3million.
Solskjaer said: ''He has had a hard time, he came here with big potential, he is a young kid and young kids are not the ones you expect to carry a team. He is a young man who will play lot of good football in his career.''