EVGA E758 vs EVGA 141

There are two Evga motherboards that start with 141. Will try to break them down for you.

EVGA 141-BL-E769-A1 LGA 1366 Intel X58 Extended ATX SLI Classified Hydro Copper Intel Motherboard
This is the Top end Classified version with Hydro(water) Copper for the northbridge. It can also do Tri-SLI in 16x16x8, plus it is EATX size board.
http://www.newegg.com/Product/Prod [...] 6813188050

EVGA 141-BL-E757-TR LGA 1366 Intel X58 ATX X58 SLI LE Intel Motherboard
This is the Light Edition that does SLI in 16x8 speed and one of the lower price board from Evga and it is an ATX size board.
http://www.newegg.com/Product/Prod [...] 6813188049

The E758 also has two board. The A1 = standard 1 year warranty extendable to limited lifetime warranty by registering within the first 30 days from date of purchase. This product would include eligability for step up program.

The TR = standard 1 year warranty extendable to an extra year with registration within 30 days from date of purchase. The X58 -TR models is not eligible for the step up program.

Both boards can do Tri-SLI in this configuration 16x16x8 and both boards are ATX size.

EVGA E758-A1 3-Way SLI (x16/x16/x8) LGA 1366 Intel X58 ATX Intel Motherboard
http://www.newegg.com/Product/Prod [...] 6813188039

EVGA E758-TR 3-Way SLI (x16/x16/x8) LGA 1366 Intel X58 ATX Intel Motherboard
http://www.newegg.com/Product/Prod [...] 6813188046

Hope this answers some of your questions.