Diame joined the Magpies from Hull City earlier this summer.
Hull's Mohamed Diame in action with Derby's Will Hughes
Diame signed for Newcastle on a three-year contract at the start of August after the Tyneside club activated his release clause at Hull City.
The 29-year-old admitted that the prestige and fame of Newcastle made them a difficult proposition to turn down, and revealed that discussions with former St. James' Park stars convinced him.
Charles N'Zogbia (L) and Mohamed Diame in their Wigan days
Charles N'Zogbia, with whom Diame played with at Wigan Athletic for two years from 2009 to 2011, and his Senegalese compatriot Habib Beye, were both big advocates of a move to Newcastle.
Diame told the Chronicle: "Everybody knows Newcastle. I know the issues here as well and I know Senegalese players who have been here. We all know the stories about Alan Shearer and what he did at the club. I have played with players who have been here too.
"Charles N’Zogbia told me things and Habib Beye too. They have been here at this massive club. When I spoke to a few people before making my decision they said it was a massive club even though they aren’t in the Championship.
Ex-Newcastle defender Habib Beye
"I know that we will back to the Premier League and they said just go there."
Though he is approaching 30, Diame evidently still has plenty to offer at Championship level, having scored 10 goals in 45 appearances for Hull last season, including the late winner in the play-off final at Wembley as he secured promotion for the Tigers.
He has already made his debut for Newcastle, but he has been ruled out of the meeting with Reading on Wednesday night.
Mohamed Diame celebrates scoring the play-off final winner for Hull