Is this a good overclock for my GTX 970?

[shnewpl]

I have an MSI GTX 970. My afterburner settings are +25 mV, +220 Core clock, +500 Memory Clock, 110% power limit. I reach 1550 Mhz boost clock and 4000 Mhz memory clock. So I'm wondering, is this good? I don't really know where this stands compared to other overclocked 970s. I ran Heaven 4.0 and got 1632, but again, not sure if that is good or not.

 

[drtoast]

pretty good.... but heaven isnt that demanding... bench it through 3dmark firestrike. I ran stable heaven + valley, failed firestrike. when i passed firestrike, still crashed in games. had to drop a good 100mhz on mem to get it stable for games.

 

[mp5mafia]

I have an MSI GTX 970. My afterburner settings are +25 mV, +220 Core clock, +500 Memory Clock, 110% power limit. I reach 1550 Mhz boost clock and 4000 Mhz memory clock. So I'm wondering, is this good? I don't really know where this stands compared to other overclocked 970s. I ran Heaven 4.0 and got 1632, but again, not sure if that is good or not.

Yeah, it's a good setting but you running on air VRAM will most likely overheat during gaming or even 3D Mark. Your clock should be ok to hold +220 though. You can overclock GTX 970 vram as much as +500 and even higher but only when you water cool it and need to look after 4 additional vram chips which are placed on the back side of pcb and without any stock cooling to it that's why your vram clock will crash driver sooner or later.
If on stock cooler you probably looking at around +(200-250 max) to keep it stable while heavy gaming and I assume that's the purpose for the card