Originally Posted by
brettjv
GPU-Z = Shows the 'Actual' memory frequency (1500MHz on Kepler Cards)
Afterburner/PrecisionX = are still calibrated to the days when people were running DDR3 vram. DDR3 is what they call 'double-pumped', meaning that for every clock cycle, two bits worth of data are transferred. Thus, 1500MHz in GPU-Z = 3000MHz in Afterburner/PrecX. It doesn't take DDR3 or DDR5 into account, it just assumes you're running DDR3 and shows 2 x Actual memory frequency. I'd imagine the problem is that the driver API does not 'expose' the memory type (DDR3 vs DDR5) to the application, so they're just leaving it calibrated to DDR3 cause that's what people are 'used to' in terms of the way these two apps run.
Some other tools out there (I think the Asus tool is this way) are properly calibrated to DDR5, which is 'quad-pumped' memory ... for each clock cycle, 4 bits of data can be transferred. Thus, in these tools, you'll see them display 4 x Actual Memory Frequency, or 7000 6000MHz in the case of Kepler cards. This is referred to as the 'Effective' clock rate of the memory.
I'm certain you're mistaken in your recollection of seeing people running AB/PrecX wherein their memory clocks were >6000. It was probably a vendor-specific program like Trixx or the Asus OC'ing tool
"Power Target" is determined by the bios of the card, which loosely equates to the 'model' of the card you have (I say loosely because sometimes cards change without the model # changing, and people sometimes flash their cards with bioses from other cards). However, no matter what the max power target % shows up as, the ACTUAL wattage the card is allowed to pull is the same on all models that have 2 x 6-pin connectors. Some cards are just set up on a different 'scale' than others.
Cards that have 6-pin + 8-pin (like my GB OC model) are calibrated to a different scale because this power connector configuration is rated at 300W max draw instead of 225W draw like 2 x 6-pin cards.
In any case, since the voltage is capped at 1.175V on (most) Keplers, the max power target % available on your card is certain to be more than the actual power draw your card is capable of pulling, so it's really nothing to concern yourself about