Efficiency evaluation
Let’s now move on to the efficiency evaluation, as the amount of watts needed to achieve a certain gaming performance in terms of FPS as a metric in watts per FPS. This is the opposite of what the manufacturers like to use, but I think it is much easier to use the larger numbers before the decimal point. And because I don’t want to force you to use a calculator, the calculation is included as a bar-graph service for free. We can see that the KFA2 GeForce RTX 4090 SG 24GB (1-Click-OC) is almost as efficient in QHD as NVIDIA’s GeForce RTX 4090 FE!
And what happens now in Ultra HD? The KFA2 GeForce RTX 4090 SG 24GB (1-Click-OC) has to work much harder and is less limited by the CPU. This lowers the efficiency somewhat, but it is still at the top.
Various processes can also be used to make Ultra HD more playable, but how does this affect efficiency? Even though especially the new Tensor cores have to do more work, the KFA2 GeForce RTX 4090 SG 24GB (1-Click-OC) is still very slightly ahead of the Founders Edition in terms of efficiency (better cooling). But that is not really much and can be tolerated very well in view of the performance and low operating noise.
Summary and conclusion
The KFA2 GeForce RTX 4090 SG 24GB (1-Click-OC) is a quite clever compromise between a certain common sense (if you can even say that for such a card) and the feasible cost savings. But it still offers a nice look (for those who like LED) and an appealing overall performance. The build quality is good, the components are chosen appropriately and at the end of the day, you will usually trim such cards to be more frugal anyway. This map even meets you halfway.
You can certainly discuss OnSemi’s voltage converters, but it goes at least two classes lower there as well. Since you also use 9 phases instead of 8 and thus offer two more control loops than the even cheaper competitor, this is even put into perspective. Switching frequency and LC sizing fit, so what the heck. The cooler is fully up to the task and even acts pleasantly quiet. The graphics card holder is not overwhelmed with the two kilos of combat weight of the card and does a good job.
Visually, everything is solidly implemented and, apart from the LED lighting, not so conspicuous that you quickly get tired of it. It is a well-balanced solution that has added a bit more exactly where it seemed necessary. The fact that some other compromises then became necessary for this is quite acceptable. However, in view of the generally high prices of such cards, a purchase tip simply cannot be given in the conventional form, my conscience goes on strike. But there is a recommendation for those who can and want to spend the money, but might still prefer to invest in a decent power supply. In the end, you get more out of it than from an almost perfect 2500 euro card.
The graphics card was provided by KFA2 for this test. The only condition was compliance with the blocking period; there was no influence or remuneration.
KFA2 GeForce RTX 4090 SG (1-Click OC), 24GB GDDR6X, HDMI, 3x DP (49NXM5MD6DSK)
- 1 - Introduction, technical data and technology
- 2 - Test System and the igor'sLAB MIFCOM-PC
- 3 - Teardown: PCB and cooler
- 4 - Gaming Performance
- 5 - Power Consumption and load balancing
- 6 - Transients and PSU recommendation
- 7 - Temperatures, clock rates, fans and noise
- 8 - Efficiency. summary and conclusion
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