@user631 Looks clean to me! Only suggestion is WHY DID YOU BUY AN ANIME CPU cooler 
??? You should have bought a cheaper and Better CPU Cooler. and then perhaps upgrade other parts. Overall I think this build is awesome! 
Just remember to check Bio’s, Updates, Cables, you’re ready for a 1440p or 4K Gaming Journey! 
might I ask tho; what was your old PC specs? Also, what’s your monitor specs?
Instead of the 7800x3d you could get a 9700x for cheaper but it wouldn’t have the x3d cache. The 7800x3d is $40 more. Another thing, the 9700x and 7800x3d are pretty matched in performance but the 9700x runs cooler.
I Have the 78003dx And 9070xt Steel legend combo and it’s amazing. Different motherboard and memory, but I don’t think that would make much of a difference. and you’re buying the GPU for like $50 less now than when I bought it.
Hey @user631 and welcome to the Newegg Gamer Community!
Overall, your build looks very good. Some things are a bit off-balance, and we’ll go over those in a moment. The first question is - is this build primarily intended for gaming? Do you often create content or plan to do so in the future? What resolution and refresh rate do you plan to use with your monitor? These are all questions which direct our path here.
- The AMD Ryzen 7 7800X3D is generally considered to be the second-fastest gaming CPU on the market, only behind the Ryzen 7 9800X3D. These two CPUs are so fast that even a GeForce RTX 5090 can’t fully saturate the CPU’s capabilities, so this is too much CPU for a Radeon RX 9070 XT. As mentioned by others here, a 9700X would be a more suitable match; you can easily also opt for a 7700X if you find a combo deal or discount somewhere. The performance difference in gaming would be non-existent due to your GPU being only upper midrange, and not top-tier.
- The Samsung 9100 Pro you’ve chosen is one of the fastest SSDs on the market; you’ll notice the PCIe 5.0 speeds if you do content creation from local storage. For example, if you intend to record your gameplay and create YouTube videos, having that extra bandwidth will be greatly beneficial; for pure gaming scenarios, it’s a waste of money, and you’d never notice a difference in any SSD over about 7GB/second. Save some serious cash and purchase a nice Gen4 SSD such as a Silicon Power US75.
- The Pure Power 12 850W power supply from be quiet! is a great power supply, but also drastically overkill for the components selected here. The Radeon RX 9070 XT peaks at just over 300W of power draw, and 7800X3D at around 165W under full boost. Given those two parts together can only get up to around 465W of peak power draw together, you’d be well-served by a 750W power supply instead for considerably less money. Many users make the mistake of buying too beefy of a power supply and wasting money that could have been used to upgrade other components; in reality, all power supplies lose some of their capacity over the years, and even if you were to buy an 850W power supply today, that doesn’t guarantee you’d be able to fully utilize its extra wattage if you upgraded to 12V-2x6 GPU in a few years.
- The primary concern about the RAM selection here is the ultra low latency having little to no effect when using a CPU with 3D V-Cache. If you stick with your selection of a CPU with 3D V-Cache, you could opt for another RAM kit with looser timings, and it would have practically zero performance impact - RAM latency is pretty much solved by the ultra-fast cache on the CPU package. That said, 6000MHz is the sweet spot for Ryzen when using 2 sticks, so you’ve made a good selection there. However, be prepared for extreme memory training timings with odd-size sticks (2x 24GB) as we’ve heard reports of this memory training taking over an hour.
- The cooler you’ve chosen is quite obviously a primarily aesthetic choice. A cooler with a 360mm radiator is quite overkill for a Ryzen 7 7800X3D; due to its design, the CPU core chiplets are physically underneath the 3D cache, separating them thermally from the heatspreader on the CPU. Due to this design, AMD has intentionally limited boosting and overclocking settings on the Ryzen 7 7800X3D, which makes it one of the most thermally-efficient CPUs for gaming today. You would get identical performance out of a sub-$40 Thermalright Peerless Assassin, but you’ve made an aesthetic decision here which you’re probably sticking with.
Best of luck with your build, we look forward to pictures of the final product!
agreed. it’s a slick build in theory, but some of it is overkill when matching the components - in particular the RAM latency, even the amount above 32GB is probably unnecessary, along with the beefy PSU wattage and NVMe drive. It’s ‘safe’ for upgrades I suppose, depending on the long-term intent, is another way to look at it. those are all quite quality components!
I thought the two X3D chips couldn’t fully leverage the 5090, I guess I was wrong! Thanks for the new information.