5,1 poss older model?

check the serial # at http://selfsolve.apple.com
or
check the SMC version. MacPro4,1 has SMC version 1.39f5, even if it's upgraded to MacPro5,1 EFI ROM.

2.8 GHz QC wasn't available in the MacPro4,1 from the factory.

The best way to check is serial number. However an easy way (but not 100% reliable) is to check this 2 numbers.

The only Quad 2.8GHz offered by Apple were the 2008 (3,1) and the 2010 (5,1). So it appears that you have a genuine 5,1 and not an updated machine. But, as has been suggested, check "About This Mac" and the first hardware line should read "Mac Pro (Mid 2010)". In addition check the serial number with an online site.

Lou

SMC 1.39f11 is definitely a MacPro5,1. there's still no known way to edit/reflash this.

mikeboss said:

SMC 1.39f11 is definitely a MacPro5,1. there's still no known way to edit/reflash this.

Click to expand...

In fact, FakeSMC can change that number.

h9826790 said:

In fact, FakeSMC can change that number.

Click to expand...

uhm, it can trick OS X into "thinking" that the SMC version is a different one but it can't edit the values in the SMC Flash ROM. or can it?

It won't flash the chip, but will show the FakeSMC version number (editable) at system info.

^^^^Just as we all figured. Good Luck on the Upgrade!

Lou