CPU_VS_GPU / 2026-09-11
Intel Core i5-14400vsAMD RX 5700 XT
Complete bottleneck analysis at 1080p, 1440p, Ultrawide (UWQHD/SUWQHD), and 4K with estimated FPS for popular games.
54%
ESTIMATED GPU BOTTLENECK
Your GPU (RX 5700 XT) severely limits the system at 2560x1440, leaving the Core i5-14400 heavily underused. A faster GPU would improve performance dramatically.
Load estimated by the model, not measured on your PC.
- PROCESSORIntel Core i5-14400
- GRAPHICSAMD RX 5700 XT
- MEMORY16GB DDR4/DDR5
- RESOLUTION2560x1440
Average across the demanding titles at 2560x1440.
Average across the competitive titles, where the processor leads.
What the build draws (440 W) plus headroom.
DEEP-DIVE ANALYSIS
GENERATED BY THE ENGINEAre the Intel Core i5-14400 and the AMD RX 5700 XT a good match? To find out we modelled the pair from 1080p up to 4K, cross-referencing the model's gaming scores for the CPU (73/100) and the GPU (20/100), calibrated against measured benchmarks rather than synthetic scores, with the demand profile of each game.
Straight answer: 1440p, at about 34 FPS in AAA
The RX 5700 XT sets the limit at both ends of the range: a ~30% GPU bottleneck at 1080p that widens to ~76% at 4K. Straight up: this combination does not deliver a steady 60 FPS in AAA games. 1440p at about 34 FPS is the best compromise, and dropping a setting or two — or turning on DLSS/FSR — turns that into a comfortable frame rate.
As you climb from 1080p to 4K, the load shifts from the processor toward the graphics card: every extra pixel lands on the RX 5700 XT. Here, efficiency moves from 70% at 1080p to 24% at 4K — which shows the part the frame rate depends on at each end.
In esports titles like Valorant this pair flies — around 618 FPS at 1080p, plenty for a high-refresh monitor. At the other end, a demanding AAA like Alan Wake 2 drops to ~9 FPS at 4K, which is where the RX 5700 XT's ceiling really shows. Overall, expect about 50 FPS average in AAA games at 1080p and around 19 FPS at 4K.
[CPU] Core i5-14400
On the CPU side: the Core i5-14400 rates 73/100 for gaming in this model and brings 10 cores and 16 threads. At lower resolutions it's the one setting the pace for the whole system.
[GPU] RX 5700 XT
The RX 5700 XT (20/100 on the model's gaming scale) supplies the raster muscle of the build. Its 8 GB of GDDR6 set how far it can go on resolution and texture quality before video memory runs short.
On the chemistry of the pair: The processor is considerably newer than the graphics card (5 years), so you have plenty of headroom to drop in a stronger GPU later. You're combining an Intel platform with an AMD GPU — a perfectly valid mix that imposes no penalty.
WHAT TO CHANGE, AND WHAT IT COSTS
At 1440p the RX 5700 XT sets the frame rate, and the Core i5-14400 can drive a faster card. The cheapest card that clears our bar for a recommendation (at least 25% more frames) is the NVIDIA RTX 4060: about 26% more in this model, with this processor and 16 GB. This processor keeps up with cards up to the AMD RX 7900 XTX; anything between the two is an upgrade that gets used, and beyond that card the processor becomes the limit.
The gain is the model's estimate at 2560x1440 with 16 GB, not a measurement of your PC, and prices change: check them at the retailer before deciding.
PRICE OF THIS PAGE'S PAIRING
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SPECIFICATIONS
CATALOGUE DATA[CPU] Intel Core i5-14400
- Cores10C / 16T
- Clock2.5 – 4.7 GHz
- TDP65 W
- SocketLGA1700
- Single-thread3,855
- Multi-thread26,044
- L3 cache20 MB
[GPU] AMD RX 5700 XT
- VRAM8 GB GDDR6
- Memory bus256-bit
- TDP225 W
- G3D Mark16,814
- Memory bandwidth448 GB/s
BOTTLENECK BY RESOLUTION
SYNERGY · AVERAGE FPSYour GPU (RX 5700 XT) severely limits the system at 1920x1080, leaving the Core i5-14400 heavily underused. A faster GPU would improve performance dramatically.
Your GPU (RX 5700 XT) severely limits the system at 2560x1440, leaving the Core i5-14400 heavily underused. A faster GPU would improve performance dramatically.
Your GPU (RX 5700 XT) severely limits the system at 3440x1440 (Ultrawide 21:9), leaving the Core i5-14400 heavily underused. A faster GPU would improve performance dramatically.
Your GPU (RX 5700 XT) severely limits the system at 5120x1440 (Super Ultrawide 32:9), leaving the Core i5-14400 heavily underused. A faster GPU would improve performance dramatically.
Your GPU (RX 5700 XT) severely limits the system at 4K, leaving the Core i5-14400 heavily underused. A faster GPU would improve performance dramatically.
ESTIMATED FPS BY GAME
1920x1080SYSTEM DIAGNOSTICS
POWER · VRAM & PCIe · RAMPOWER ESTIMATION
The Core i5-14400 (65W) and RX 5700 XT (225W) add up to roughly 290W under load. Adding 150W for the rest of the system gives 440W, and with a 30% transient margin, 600W is the safe figure.
VIDEO MEMORY AND PCIe
The RX 5700 XT's memory bus (256-bit) and bandwidth (448 GB/s) describe its own video memory, meaning how fast the card reads its 8 GB of GDDR6, not the PCIe link to the processor. The PCIe link depends on the card, the processor and the motherboard slot together; our catalogue does not record PCIe generation or lane count, so the model does not estimate it. It matters most for cards with an eight-lane interface in older PCIe 3.0 boards: check the card's and the board's specifications.
SYSTEM MEMORY
This page assumes 16 GB in dual channel. At 1440p, the resolution recommended above, that meets the model's capacity target of 16 GB (enough for three in four of the games it covers), so more capacity would add little or nothing there. The target stays at 16 GB even at 4K, so a larger kit is for heavy multitasking or mods, not for these games. Memory speed and a second channel act on the processor's ceiling instead: they matter in the games the CPU limits, by an amount that depends on the game, and the calculator lets you enter your own kit.
HOW THIS PAGE IS CALCULATED
ENGINE v2026.08 · 2026-09-11CALCULATED, NOT WRITTEN
Every figure and every sentence comes from the same deterministic engine, driven by the catalogue specifications. That is what makes it reproducible: with the same engine version (2026.08) and the same catalogue, the same pairing always gives the same result. When either changes, the version and date above change with it, and the changelog says why.
WHERE THE DATA COMES FROM
Specifications come from the official AMD, Intel and NVIDIA datasheets together with PassMark and TechPowerUp. The gaming indices are calibrated against frame rates published by review outlets (TechPowerUp, TechSpot / Hardware Unboxed, Tom's Hardware, Gamers Nexus, Digital Foundry) rather than synthetic scores. That data is compiled, not measured here: this site runs no test bench of its own.
STATED LIMITS
Figures estimate native raster performance at high/ultra quality, with no ray tracing, upscaling or frame generation. We do not yet publish an externally validated error margin — the accuracy page states exactly where that stands.
* Affiliate disclosure: the Amazon links exist to show pricing. As an Amazon Associate we earn from qualifying purchases at no extra cost to you. Recommendation order is decided by the engine and does not depend on commission.
TRY WITH YOUR OWN HARDWARE
Customize RAM, resolution, and discover upgrade recommendations.
FREQUENTLY ASKED QUESTIONS
5Does the Intel Core i5-14400 bottleneck the AMD RX 5700 XT?
The RX 5700 XT sets the limit at both ends of the range: a ~30% GPU bottleneck at 1080p that widens to ~76% at 4K. Overall, the GPU is the limit at high resolution, with 41% average efficiency across the 12 resolutions our model tests. 1440p is the highest resolution that stays playable, at about 34 FPS on average in AAA titles.
How many FPS do the Core i5-14400 and RX 5700 XT get at 1080p?
At 1080p this combination averages about 50 FPS in AAA games and around 321 FPS in esports titles. In Valorant we estimate up to 618 FPS.
Is this pairing good for 4K gaming?
Not for AAA titles at native high settings: about 19 FPS on average at 4K. It would take upscaling, much lower settings or faster hardware.
What power supply do I need for the Core i5-14400 and RX 5700 XT?
With an estimated combined draw of 290W across CPU and GPU, we recommend at least a 600W 80+ Gold supply (ideally ATX 3.0) to run with headroom.
Is the RX 5700 XT's 8 GB of VRAM enough?
8 GB falls short at 1440p for 3 of the 11 games the model tracks, and for 6 at 4K. In those titles expect to lower texture settings, or to see frame-time spikes if you do not.