EFB2Ram can be slower in some cases with EFB2Ram on OpenGL, it costs a lot more and OpenGL has specific things it doesn't like on top of that.
But, in 90% of games, OpenGL will provide better speeds, even with EFB2Ram at lower Internal Resolutions. Mario Galaxy 2 in specific, you will not get good speeds on D3D (or on D3D9, for that matter) in the 6th world due to a special effect used that doesn't like D3D, so I don't exactly know why you're boasting when it's pretty obvious you didn't do much research.
And looking at your specs, your settings are probably just inefficient which is causing you not to get full speed. You have a fast computer, you obviously have played a few games, why do you need us to help? Experiment, play with the settings yourself. If you don't want the generic performance advice, act like someone who actually knows what they're doing. Open up the goddamn INI and see what it's setting.
But, in 90% of games, OpenGL will provide better speeds, even with EFB2Ram at lower Internal Resolutions. Mario Galaxy 2 in specific, you will not get good speeds on D3D (or on D3D9, for that matter) in the 6th world due to a special effect used that doesn't like D3D, so I don't exactly know why you're boasting when it's pretty obvious you didn't do much research.
And looking at your specs, your settings are probably just inefficient which is causing you not to get full speed. You have a fast computer, you obviously have played a few games, why do you need us to help? Experiment, play with the settings yourself. If you don't want the generic performance advice, act like someone who actually knows what they're doing. Open up the goddamn INI and see what it's setting.