There is a GTX 760 in there and the user claims he cranked up the gpu core clock by +352. I have not seen any test/review that got past 190-200, depending on the manufacturer, before the cards more or less crashed instantly in the benchmarks. He either made a mistake or has some magical oc powers.
Scrypt-jane doesn't stresses the GPU like benchmarks and games. For example in my case, 1215 Mhz core clock OC (from 1136 stock) is pushing it in benchmarks/games/scrypt hashing, but for scrypt-jane I'm going stable for days at 1293 Mhz.
I'm not saying that makes that +352 Mhz core OC legit, but it is within the realm of possibility when the card is only being used for scrypt-jane.