CPU vs GPU verdict

The GTR Gaming PC AMD Ryzen 7 7800X3D RTX 5070 and the ADMI Gaming PC Ryzen 7 5700X RTX 5070 Ti frame the classic 1440p gaming PC decision: stronger CPU or stronger GPU. The GTR build costs £1,916 and pairs the AMD Ryzen 7 7800X3D — the strongest pure-gaming CPU AMD ships in 2026 — with the NVIDIA RTX 5070 carrying 12 GB of VRAM. The ADMI build costs £1,674, pairing the older AMD Ryzen 7 5700X with the NVIDIA RTX 5070 Ti carrying 16 GB of VRAM. The £242 gap goes to the CPU tier on the GTR, not the GPU.

Ryzen 7800X3D vs 5700X gaming PC: the short answer

• 1080p competitive shooters favour the GTR 7800X3D build. CPU-bound titles such as Counter-Strike 2, Valorant, and Apex Legends gain 15-25 percent from the 7800X3D's 3D V-Cache.
• 1440p ultra single-player gaming favours the ADMI 5070 Ti build. 16 GB of VRAM and roughly 25 percent more GPU horsepower uplift frame rates in GPU-bound AAA titles where 8-core CPUs are not the bottleneck.
• The GTR is the upgrade-friendly platform. AM5 supports CPU swaps through 2027. The ADMI is on AM4, end-of-life.
• The ADMI is £242 cheaper with a 3-year UK warranty, the same as on the GTR.

When does CPU matter more than GPU?

The Ryzen 7 7800X3D ships with 96 MB of 3D V-Cache, AMD's stacked L3 cache that delivers a 15-25 percent uplift over the Ryzen 7 5700X in cache-sensitive workloads. Competitive shooters at 1080p run from L3 cache because the GPU clears frames so fast that the CPU becomes the bottleneck. The 7800X3D delivers 380 fps to the 5700X's 310 fps in Counter-Strike 2 at 1080p competitive settings in third-party benchmarks.

At 1440p ultra in AAA single-player titles such as Cyberpunk 2077, Alan Wake 2, and Black Myth: Wukong, the GPU does the heavy lifting. CPU bottlenecks shrink to under 5 percent. In those workloads the RTX 5070 Ti's 25 percent GPU lead over the RTX 5070 translates directly into 25 percent higher frame rates, regardless of which Ryzen is driving the system.

The rule of thumb: if your library is heavy on competitive shooters at 1080p high-refresh, the 7800X3D earns its price premium. If your library is heavy on 1440p ultra AAA titles, the RTX 5070 Ti GPU bump is the better £242 to spend.

VRAM: 12 GB vs 16 GB

The NVIDIA RTX 5070 carries 12 GB of GDDR7 VRAM. The NVIDIA RTX 5070 Ti carries 16 GB of GDDR7 VRAM. 12 GB clears every current 1440p ultra workload in May 2026. 16 GB extends headroom into texture-heavy titles such as The Last of Us Part II PC and Indiana Jones and the Great Circle, where 12 GB is borderline.

For 4K gaming, neither card carries enough VRAM for consistent performance with ray tracing on. The 16 GB on the RTX 5070 Ti buys more 4K headroom than the 12 GB on the RTX 5070, but both remain 1440p-first cards. Buyers playing exclusively at 4K should step up to an RTX 4080 (16 GB) or RTX 5080 (16 GB) build.

GTR Gaming PC AMD Ryzen 7 7800X3D RTX 5070

ADMI Gaming PC Ryzen 7 5700X RTX 5070 Ti

GTR 7800X3D vs ADMI 5700X spec sheet

Which build should you buy?

Buy the GTR Ryzen 7 7800X3D RTX 5070 if

• You play competitive shooters at 1080p high-refresh.
• You play CPU-bound titles such as Microsoft Flight Simulator or Counter-Strike 2.
• You want the AM5 upgrade path through 2027 and beyond.
• You can absorb the £242 premium.

Buy the ADMI Ryzen 7 5700X RTX 5070 Ti if

• You play 1440p ultra single-player AAA titles primarily.
• You want 16 GB of VRAM headroom for future titles.
• You want to save £242 to put toward a better monitor.
• You do not plan to upgrade the CPU within 4-5 years.

Verdict

The decision is a workload conversation. The GTR Gaming PC AMD Ryzen 7 7800X3D RTX 5070 at £1,916 is the right buy for competitive shooter and CPU-bound title gamers, where the 7800X3D's 96 MB of 3D V-Cache delivers a real frame-rate uplift the GPU cannot match. The ADMI Gaming PC Ryzen 7 5700X RTX 5070 Ti at £1,674 is the right buy for 1440p ultra single-player gamers, where the RTX 5070 Ti's 16 GB of VRAM and roughly 25 percent more horsepower beat the CPU uplift. Both ship with Windows 11 pre-installed and UK warranty cover. For the full pillar shortlist across all price tiers, see Best gaming PC UK 2026.