A user on Chinese forum WeiPhone posted (via MacRumors) photos that allegedly show off the logic board placed in the new MacBook Pro, which is to be announced tomorrow during Apple’s keynote opening at this year’s Worldwide Developers Conference. According to the leak, the MacBook Pro is set to feature a NVIDIA GT 650M graphics chip with 1GB GDDR5 graphics memory.

Another forum user analyzed the new logic board and put it side-by-side with the logic board on the current 15-inch MacBook Pro. As you can see, both logic boards have very similar layouts. The position of the GPU is also the same on both units.

We were the first to report last week that Apple is set to announce a refresh to most of the Mac line tomorrow, including the Mac Pro. Our sources indicated that Apple will release two configurations of the redesigned 15-inch MacBook Pro; although, what Apple plans to do with the other screen sizes is unclear. The new MacBook Pro will sport Retina graphics, an ultra-slim design, and USB 3.0. Our source said the Retina display is “jaw dropping.”

Tonight’s leak does not indicate what type of processor speed the new MacBook Pro will have, but it is somewhere in the neighborhood of 2.3 GHz, 2.5 GHz, or 2.7 GHz chip variants. You can bank on the processor being Intel’s new Ivy Bridge chip that supports Retina graphics, but pricing is still up in the air.

All of our questions will be answered tomorrow when Apple’s CEO Tim Cook and his company take the stage to make things official. You can read our full wrap-up of what we expect to be announced and follow our liveblog kicking off at 1 p.m. EST/10 a.m. PST tomorrow!

Update: this morning we reported Apple will be announcing both next-generation MacBook Pros with a thinner design and Retina Display AND spec-bumped MacBook Pros with the current design.