I tried mining with stratum + tcp: //solo.ckpool.org: 3333 using OS: Windows11, cgminer ver3.7.2, Geforce RTX 3090. The average speed is displayed as 2.148Gh / s. Is this the correct speed? The GekkoScience Compac F USB is 350Gh / s, but the Geforce RTX 3090 is too slow. Please teach.