I used the PCSpecialist Cortex Supreme for 3 months — is this RTX 5070 Ti pre-built PC worth it long-term?

Tom's Guide

02-07-2025

I get it — the big names are a good go-to for pre-built gaming PCs. Whether it's the Alienware Area-51 or the Corsair Vengeance I8300, with the amount of money you're dropping, brand may be something you take into consideration.
But before you do that, I want you to stop and look at what PCSpecialist is doing — particularly the Cortex Supreme, because in all metrics (build quality, price to performance, warranty) this is one of the best gaming PCs I've tested.
More boutique than big brand, you may have seen the U.K. company's name crop up in Twitch streams and podcast sponsorship messages. You get control over every aspect of what goes into this PC and the case it's housed in, which is a big step from the preset configurations you get with mass market brands.
Now boutiques can come with problems of their own, such as the quality of the build (cable management for example), the optimization of it all, and the length and depth of warranty coverage. But the biggest question is always going to be price — a premium over just building it yourself is expected, and mid-size boutiques can charge significantly more.
Well, what if I said that not only is it cheaper than the big players, it also packs a more comprehensive warranty, and the final build is well-laid-out and optimized out of the box? Let's get into it.
If you make some strategic decisions on using slightly less premium braided cables than what I got, you can get this price down to £2,294. But I'd er on the side of caution for that and get some good quality cabling for keeping things tidy and longevity!
PCSpecialist Cortex Supreme (as tested)
Price
£2,487
CPU
AMD Ryzen 7 9800X3D
GPU
Nvidia GeForce RTX 5070 Ti
RAM
32GB
Storage
2TB
Ports
Top: 2x USB-A, 1x USB-C, 1x headphone jack, 1x line out. Rear: 1x DisplayPort 1.4, 1x HDMI 2.1 (covered up, as you'll use GPU instead), 6x USB-A, 2x USB-C, 1x 2.5Gb Ethernet, 1x line in, 1x line out
Dimensions
17.6 x 8.5 x 17.7 inches
Weight
33.8 pounds
Packaged nicely and securely with plenty of padding on the inside and outside of the PC, I dug out the box of additional accessories (super helpful for if you need to make tweaks of your own), connected it up and started playing.
So I won't go into the aesthetics here, even though I am indeed in love with this Fractal North case adding a real sense of class to my gaming setup. What I'll look into instead is the actual build, because that's what matters, right? What is the PC building knowhow like over there at PCSpecialist?
In two words: it's great. Cable management is nice and tidy, using all the proper channels with no unnatural blends, airflow is well considered in fan placement, screws were evenly placed and torqued, and there were no bent elements like the I/O shield, plus plenty of clearance around the PSU too!
Plus, that attention to the build means zero fan rattle and case panel vibration under load, so you're getting great thermal management with very little fan noise.
You've already seen a lot of these numbers in my RTX 5070 Ti review — given this was the build I used for testing. But let's zero in on the rest of the system specs here.
PC
PCSpecialist Cortex Supreme (AMD Ryzen 7 9800X3D, RTX 5070 Ti, 32GB DDR5, 2TB PCIe 4 SSD)
Alienware Aurora ACT1250 (Intel Core Ultra 265KF, RTX 5070, 32GB DDR5, 1TB PCIe 3 SSD)
Geekbench 6.4 single-core
3160
3071
Geekbench 6.4 multicore
16631
20010
Geekbench AI CPU Quantized score
13596
9981
Geekbench AI GPU Quantized score
25074
21961
Handbrake (transcoding 4k video to 1080p in mm:ss)
3:09
2:01
SSD read speed (MBps)
1993
1649
As a work machine, it's slightly slower than the equivalent Intel chip, but it's more than clear that the AMD Ryzen 7 9800 X3D is one of the best gaming CPUs that you can get in a system right now. Pair that with a ton of RAM and fast storage, and you've got a multitasking monster.
Throw the 5070 Ti in there too, and it becomes a creator pro workstation with the greatest of ease (as you saw in my experience using the on-device AI capabilities), and of course, the gaming performance is stellar.
3DMark Gaming Benchmark
PCSpecialist Cortex Supreme (AMD Ryzen 7 9800X3D, RTX 5070 Ti, 32GB DDR5, 2TB PCIe 4 SSD)
Alienware Aurora ACT1250 (Intel Core Ultra 265KF, RTX 5070, 32GB DDR5, 1TB PCIe 3 SSD)
Fire Strike Ultra
18105
14786
Time Spy Extreme
13358
10835
Speed Way
7555
5741
Port Royal
14224
14062
And of course, these numbers are before we even talk about activating the AI trickery of DLSS 4 — infusing frame rates with additional AI-generated frames without a massive impact made to the latency.
And it means you can get a lot more out of this than the traditional rasterization. Whether it's path tracing in Doom: The Dark Ages, or taking advantage of the neural rendering techniques in Half-Life 2: RTX, there's a lot of fun to be had here without spending exorbitant amounts for RTX 5090.
Put simply, I think it's just the right balance.
So bear in mind that this machine is just under 2.5 grand. I can totally understand that's a hefty chunk of change, but let's put it into perspective here. CyberpowerPC is expecting £2,700 for the same spec level, Overclockers wants over £2,500, and so does Dell for a similarly-specced Alienware Aurora.
And with three years labor warranty with 1 year on parts, 6 months of covered collection costs and lifetime hardware technical support, you're pretty much covered for any issues or questions.
That's not to say it's a completely issue-free experience. I've already mentioned the gaming spec combination being better tuned for gameplay rather than professional work. But one thing is unavoidable.
This is always going to be the problem with pre-built PCs. One look on PC Parts Picker shows you could get all the parts yourself and build it, and save yourself over £300 in the process.
That premium is definitely on the lower side for labor when compared to other builders, but it's still going to sting your bank balance. If you need a PC building guide, we've got you.
And for video assistance, it's a little old, but PC Centric did a great timeless video guide on it!
So to answer the obvious question. Can going boutique be better than the big brand? Absolutely. You get a stellar system that is easy to get into with very minimal bloatware and all the relevant software you'll actually use ready to roll after PCSpecialist's own testing of every Cortex Supreme.
There's versatility to the customization, so you can go more or less powerful than this to your exact needs, and the warranty coverage is impressive here.
Of course, the better value option is to build yourself. But if you want to leave it to the experts, these experts are pretty stellar in the U.K.