Last Updated: 18/01/14 5:08pm
That's all from this live commentary - report, reaction and ratings to follow. Thanks for joining us.
There's no stopping Man City it seems. Cardiff gave them a good run for their money at times today, but their strength and awesome goal threat saw them to victory comfortably in the end. The Welsh club looked better than a bottom-of-the-table team though.
CAMPBELL GOAL (90+3) - from a corner, the ball comes across the face of goal and Campbell knocks it in to reduce the arrears.
Cardiff need Marshall to make another save as the ball threatens to trickle over his goalline. The Etihad attendance today is 47,213.
A great stat courtesy of Infostrada: Sergio Aguero has just scored Man City's 900th Premier League goal. Their first was scored by David White in a 1-1 home draw vs QPR on 17 August, 1992.
AGUERO GOAL (79) - Toure, near the halfway line, loops a ball into the right channel for Aguero to run onto. He tricks Caulker and finishes superbly past Marshall. 4-1.
YAYA TOURE GOAL (76) - having appeared to give the ball away to Noone inside his own half, Toure then manages to get it back and strides forward. He plays a one-two with Aguero on the edge of the box and then fires home low past Marshall. 3-1.
Aguero was sent scampering away towards goal by Dzeko but he couldn't get an initial shot away and after pivoting through 360 degrees, he fires over.
Man City are still looking the more likely to score - they're maintaining a steady 66% possession percentage and are now up to 15 shots, while Cardiff have had four - although all of those have been on target.
Cardiff are able to make that double switch now. John and Bellamy ON, McNaughton and Whittingham OFF (68). Big cheer for former Man City man Bellamy from all around the Etihad.
Cardiff are certainly still in the game, but City's strength means they're able to win those key battles in midfield time and time again. Dzeko delivered a low left-wing cross there which Turner cleared.
Noone tests Hart with a good shot from outside the area. The England keeper pushes it away for a corner.
Cazorla doubles Arsenal's advantage over Fulham - 2-0 now at the Emirates. Meanwhile, Cardiff's relegation rivals Crystal Palace are beating Stoke 1-0.
Silva comes close to extending Man City's lead but his close-range shot across goal from left to right goes wide.
Negredo rises high in an effort to get a header to a ball in from the right but it's just out of his range.
Dzeko has to do some defending as Campbell tries to connect with a Cardiff set-peice. From the corner, the ball runs loose briefly before Hart claims it.
Noone stands up a cross from the right that Zabaleta has to head away under a strong challenge from Campbell. Man City break and Dzeko fires wide at the other end.
Joe Hart is called into action! The England keeper has to get across to his left to keep out Mutch's shot from the edge of the area.
Almost a disastrous mix-up there between Marshall and Medel after a short pass out of the area was returned to the keeper.
Couple more bits of feedback. Richard Todd writes: "City have developed a ruthless streak in their play where they are almost instantaneous in response when scored on. 2nd half City will add to the score line!" And Mark Morton says: "Fair play to young Noone for a well taken goal. Little disappointed that with the wealth of attacking options we have, and the number of attempts, that we are not over the hills and far away. Aguero to come on and show us how it's done. 4-1 final score."
Yasser Hussainey from Plymouth emails in: "Hello, after Man City's crazy and amazing form, I think they'll win 4-1. I reckon Aguero will come on to score twice!"
Dave Royle from Bolton emailed in before kick-off predicting a Man City thrashing and a 5-0 margin of victory (I didn't get time to post before kick-off, sorry Dave!). Have you been surprised that Cardiff are still in the game at this point?
So Man City lead at the break but they haven't had it all their own way. What a great moment for 26-year-old Noone. Can Cardiff come back into the game again? Looking at the stats, the hosts have had 66% possession and have had 10 shots to the visitors' two.
It's looking like Man City will go in at the break top of the live league table as Arsenal v Fulham is still goalless.
Now City win another corner, as McNaughton struggles to contain Navas down on the near touchline. He plays it short to Silva, and then Kolarov is crowded out.
Cardiff have their second corner of the afternoon. Negredo sends it back to Whittingham, and it's deflected out for another set piece which Yaya Toure heads away.
NAVAS GOAL - Normal service resumed? Great strength from Yaya Toure and Dzeko in the build-up to that Man City goal. The Bosnian's shot was blocked but the ball ran loose to Navas to put the hosts ahead again on. 2-1.
NOONE GOAL - a shock equaliser! And it's the sprightly former Plymouth Argyle and Brighton winger who's got it, his first in the Premier League. Noone came in off the right flank, easily tricked Kompany in the area and coolly scored past Hart. Aron Gunnarsson with the assist. 1-1.
Cardiff have had their first shot, and it was on target too - but it was the most routine of saves for Joe Hart from Mutch.
Almost a chance for Cardiff as Campbell rises to meet Noone's right-wing cross, but he can't get any power or direction on the ball.
Negredo was almost in again there as a Kolarov delivery found its way through to him. Marshall is out sharply, however.
Negredo is put free by Zabaleta's dinked ball into the right channel and he tries to find the bottom corner with a low shot across goal, but it bends wide.
Midway through the first half now. Javi Garcia gets a cross in from the right but Marshall stretches to claim.
Negredo goes close! A ball over the top from Silva has Cardiff in trouble and his fellow Spaniard hooks it towards goal but Marshall makes himself big.
Whittingham and Mutch try to get the visitors moving again, but the latter overhits his ball down the channel for Campbell.
Negredo goes in hard on Gunnarsson, who's down injured. It's a yellow card for the Man City forward (18 mins).
That was, of course, Man City's 100th goal of the season so far. Incredible achievement by mid January.
DZEKO GOAL - the Bosnian has the Goal Decision System to thank for that one. Silva squirmed into the box on the left and pulled the ball back for Dzeko to strike. It looked like a miskick and McNaughton got back to hoof it out, but GDS showed it had already crossed the line. 1-0.
And another decent save from Marshall, this time to deny his own player - Turner had intercepted and slid the ball towards the bottom corner.
Marshall saves to his right to keep out Dzeko's goalbound shot from 15 yards. Then McNaughton heads the follow-up cross clear for a corner. Zabaleta connects with the set piece but it goes wide. Man City piling on the pressure.
Turner hoofs the ball clear after Kolarov's left-wing cross had taken a deflection on its way into the area.
Cardiff win their first corner of the game courtesy of Campbell. The away fans celebrate like it's a goal! Yaya Toure heads the ball away.
That's got the fans going early on - both CIty supporters and Cardiff fans in full voice. Silva wins a free-kick just outside the centre circle.
What a chance for the home side in the first minute! Dzeko had a shout for a penalty after going down under McNaughton's challenge after Silva's ball in from the left, and then Navas puts the follow up wide.
Today's referee is Neil Swarbrick, who is in charge of Man City's League Cup win at Newcastle and Cardiff's 2-2 home draw with Man Utd earlier this season.
Last chance for a wager with Sky Bet! Man City are huge 1/9 favourites, you can get 20/1 on a Cardiff win and the draw is 8/1.
Manchester City have won their last 10 straight Premier League games at the Etihad Stadium and won 15 of the last 16. Their only defeat in that run came when they had a caretaker manager in charge on the final day of the season in a dead rubber.
A few words from Ole Gunnar Solskjaer: "I expect my players to go out there and give it a go, to stand up and perform. Teams have come here and tried, but we have to have the courage to get on the ball or we'll be defending for 90 minutes. Craig Bellamy won't last the whole game so although I'd have liked to have started with him against his old club, he's on the bench."
Chris Green from Huddersfield has emailed in with a prediction: "Man City to win 3-0, with Negredo bagging a hat-trick."
Jordon Mutch, recalled to the Cardiff side after injury today, has been speaking to us ahead of kick-off: "It's another big game for us. City are scoring freely but we've done well away from home, like at Arsenal. We're going to try and go from the halfway and keep it tight and break on them. We did it well when we beat them at home back in August. We got goals from set pieces and hopefully we can do that again today."
This is the first time Cardiff have visited Manchester City in any competition in almost 30 years. The last occasion was in March 1985 when they escaped with a point from Maine Road after a 2-2 draw.
Ian Ashman in Mallorca is first up with some feedback via email: "I am going for a 3-1 victory to my beloved Blues, I am going for Yaya to score the 100th goal of City's season, the other two from The Beauty & The Beast (Kun & Negredo)." Hope it's warm in Mallorca - pretty chilly here at the Etihad today!
City will be looking to bring up 100 goals for the season so far today. They will go top of the Premier League again at 5pm if they get a better result than Arsenal achieve at home to Fulham. Cardiff, in 19th, could climb out of the drop zone if they can get a result at the Etihad.
Solskjaer has made four changes to the Cardiff team that lost at home to West Ham last weekend. McNaughton, Turner, Mutch and Gunnarsson all start. Kim, Hudson, John and Odemwingie all drop to the bench.
Here's the Cardiff team selected by Ole Gunnar Solskjaer this afternoon: Marshall; McNaughton, Caulker (c), Turner, Theophile-Catherine; Whittingham, Medel, Gunnarsson, Mutch, Noone; Campbell.
Manuel Pellegrini makes seven changes to the Man City side that beat Blackburn 5-0 in the FA Cup third-round replay in midweek. Only Negredo, Dzeko, Javi Garcia and Navas keep their places. Sergio Aguero is among the substitutes.
Here's the Man City starting line-up: Hart, Zabaleta, Kompany (c), Demichelis, Kolarov, Navas, Yaya Toure, Javi Garcia, Silva, Negredo, Dzeko.