KFA2 GeForce GTX 660 Ti EX OC 3GB
KFA2 is the European brand of Galaxy Microsystems, so if you’re in the USA, the KFA2 GeForce GTX 660 Ti EX OC is going to be available to you under the name of Galaxy GeForce GTX 660 Ti GC. Our sample comes under the KFA2 brand, though. Its box is similar to the Inno3D one except for the size and the picture on its front.
Besides the graphics card, the box contains two power adapters, a DVI->D-Sub adapter, a CD with drivers, an installation guide and a promo booklet.
The card is manufactured in China, costs $299 and has a 2-year warranty.
The KFA2 GeForce GTX 660 Ti EX OC is grandiose compared to the three previous products. It looks more like a GeForce GTX 680 rather than a GTX 660 Ti. It is 255 millimeters long.
The vent grid in the mounting bracket has very large cells.
Having the same MIO connectors for SLI configurations as the other cards in this review, the KFA2 differs from them in terms of the power connectors. It has one 8-pin and one 6-pin connector instead of two 6-pin ones.
Its PSU requirements haven’t changed, though. It needs a 450-watt or better PSU, just like the rest of the cards.
With the cooler removed, we can see the original PCB of the KFA2 GeForce GTX 680 EX OC model:
There are five power phases for the GPU and two more for the graphics memory chips.
The GPU voltage regulator is based on a Richtek RT8802A controller. The enhanced power circuit is supposed to ensure better overclockability and stability. We’ll check this out shortly.
The GPU of the KFA2 GeForce GTX 660 Ti EX OC differs externally from those of the above-discussed cards in one line of its marking: date of manufacture.
Internally, it differs in frequency, which is 1006 MHz and 1085 MHz in normal and boost mode, respectively. This is average compared to the GPU clock rate of the other cards in this review.
The memory chips are not overclocked, working at 6008 MHz, but the amount of memory is increased to 3 gigabytes. The card uses the same Hynix chips as the others.
So, here are the specs of the KFA2 GeForce GTX 660 Ti EX OC:
The card’s original cooler has no proper name, but it is no indication of inferior quality. It is a massive nickel-plated thing with a copper base, four 8mm heat pipes and slim aluminum fins.
The parts of the cooler are all soldered to each other. It is easy to see that the KFA2 card has the largest heatsink among all the cards in this review.
There are two 92mm impellers in plastic frames secured on the metallic casing. They are manufactured by Everflow.
The fans run on a sleeve bearing with extended service life. Depending on load and GPU temperature, the PWM-based regulation can vary the speed of the cooler’s fans from 1100 to 3100 RPM.
The KFA2 GeForce GTX 660 Ti EX OC proved to be the most efficient cooler both in the automatic regulation mode and at the maximum speed of the fans.
Automatic fan mode
Maximum fan speed
The GPU is 60°C hot when the fans rotate at 1620 RPM and only 49°C at the maximum 3090 RPM. Again, this is the best result among the eight graphics cards discussed in this review.
Unfortunately, the efficient cooling system and improved PCB do not endow the card with high overclocking potential. Its GPU could only be overclocked by 50 MHz and its memory, by 1300 MHz.
The resulting frequencies were 1056/1135/7308 MHz:
According to our monitoring tools, the GPU frequency of the overclocked card peaked up to 1187 MHz but the high-performance cooler kept the temperature at the same level:
The GPU is still only 60°C hot when the fans are regulated automatically. The KFA2 card turns out to be a highly interesting product. Now let’s see what is offered by MSI.