Mixture of NICs on a 50 user LAN

I have a office with 80 users,  there are a few machines (may be 5-10) still on 100Mbps, the rest on Giga, running off 2x48 Gigabit switches, can the machines on 100Mbps affect the overall LAN ? I know smart switches are known to deal with different speed automatically but just wondering if this will have a huge impact on the LAN performance ?
CombemartinAsked:
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Ron MartinSenior Network AnalystCommented:
The 10 users will notice the speed difference because they are slower, but the Ethernet switch design will allow the others to run at 1 gbit, as only hubs were devices that if a slower connected device were plugged in the whole network dropped to the lowest speed on the network.

The performance issues would only exist on the 10 machines or if anyone was directly connecting to them (file transfers between machines (ie: 100Mbps to 1 Gbps machine))
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Paul MacDonaldDirector, Information SystemsCommented:
Even the 100Mbs users probably won't say their connection is slow.  Internet access, and hard drive speeds will be the bottlenecks.

To answer your question, the other users won't be impacted at all by these users unless they're transferring  data with them.
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CombemartinAuthor Commented:
All these machines are used for a database setup, so workstations are accessing data to/from server, I just need to know if the 10 machines on 100Mbps will affect the rest of the LAN users. there is no user-to-user transfers.
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Paul MacDonaldDirector, Information SystemsCommented:
"I just need to know if the 10 machines on 100Mbps will affect the rest of the LAN users."
No.
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CombemartinAuthor Commented:
Thanks both.
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