Important preliminary remark
I run the card as a Radeon Pro W7800 and only extrapolate over the efficiency at the end. While these are only specifically selected games that ran cleanly, I chose these as examples from over 20 titles and the pre-release tests with two cards because the end result was almost exactly the same. DXR is being implemented in more and more games and the current engines almost all allow it by now. From this point of view, a complete abandonment would be just as unfair as the exclusive use of such titles with DXR.
Since every user has different preferences and some prefer to do without DXR completely (why actually?), I’ll accommodate all target groups a bit for once. I have summarized all the individual benchmarks in galleries below, because transparency is a must, also with regard to all the interesting metrics. Because there are partly serious differences.
Sum of all games
The RX 7800XT sim. (red bar) corresponds to the benchmarked Radeon Pro W7800 with half the memory. The RX 7800XT calc. (orange bar) was subsequently extrapolated based on the efficiency of an RX 7900XT (Watts per FPS), which yields quite plausible results.
We can see that the Radeon Pro W7800 is only 2.1% faster than the old RX 6800XT, but (we’ll see this in a moment) consumes significantly less power. The calculated card with the efficiency of the RDNA3 gaming cards is still just ahead of an RX 6900XT with a 4.1 percent advantage in Full HD. However, it is also a fact that the performance of the GeForce RTX 4070 Ti is missed by miles, but the RTX 4070 can certainly be beaten in return.
Let’s now look at the Min-FPS, i.e. the one percent of the slowest rendered frames (P1 Low). Here the RX 7800XT sim. namely 5.3 percent ahead of the RX 6800XT and the RX 7800XT calc. still 7.4 percent,
Even though I’ll have a very detailed chapter about the power consumption and the load peaks later (definitely read it!), I’ve also logged the power consumption over every benchmark for this gaming selection and also cumulated it at the end, so that a very clear picture already emerges here. The RX 7800XT sim. doesn’t even come close to the power limit of 260 watts (here the clock simply breaks away) and the extrapolated RX 7800XT calc. would at least come close to this limit with around 257 watts.
We can see from the efficiency calculation that the calculated RX 7800XT is exactly on par with the RX 7900XT. This is more or less the ideal case and it could be that a real RX 7800XT could even be a bit more inefficient (salvage). But it is and remains an (idealized) extrapolation (rather in AMD’s favor).
All single metrics in Full HD
That brings us through with Full HD, and let’s see if anything changes in QHD. Turn the page once please!
- 1 - Introduction, technical data and background
- 2 - Test system in the igor'sLAB MIFCOM-PC
- 3 - Gaming performance Full-HD (1920 x 1080)
- 4 - Gaming performance QHD (2560 x 1440)
- 5 - Gaming performance UHD (3840 x 2160)
- 6 - Power consumption and load balancing
- 7 - Transients and PSU recommendation
- 8 - Summary and conclusion
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