CPU_VS_GPU / 2026-09-11
Intel Core i5-10400FvsNVIDIA GTX 1080 Ti
Complete bottleneck analysis at 1080p, 1440p, Ultrawide (UWQHD/SUWQHD), and 4K with estimated FPS for popular games.
26%
ESTIMATED GPU BOTTLENECK
Your GPU (GTX 1080 Ti) is the limiting factor at 2560x1440. In graphically demanding titles you will see lower frame rates; a faster GPU would deliver a clear improvement.
Load estimated by the model, not measured on your PC.
- PROCESSORIntel Core i5-10400F
- GRAPHICSNVIDIA GTX 1080 Ti
- MEMORY16GB DDR4/DDR5
- RESOLUTION2560x1440
Average across the demanding titles at 2560x1440.
Average across the competitive titles, where the processor leads.
What the build draws (465 W) plus headroom.
DEEP-DIVE ANALYSIS
GENERATED BY THE ENGINEAre the Intel Core i5-10400F and the NVIDIA GTX 1080 Ti 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 (52/100) and the GPU (23/100), calibrated against measured benchmarks rather than synthetic scores, with the demand profile of each game.
Straight answer: 1440p, at about 40 FPS in AAA
At 1080p the two stay well balanced, whereas at 4K the GTX 1080 Ti is the limiting part (~60% GPU bottleneck). No 16:9 size keeps this pair above 60 FPS in demanding titles. 1440p is the highest that stays playable, at roughly 40 FPS on average in AAA. Esports is a different story — around 215 FPS at 1080p.
Resolution reshuffles the priorities. At 1080p the Core i5-10400F's single-thread speed calls the shots; at 4K it's the raw muscle of the GTX 1080 Ti that matters. That shift shows up in the numbers: 100% efficiency at 1080p versus 40% at 4K.
In esports titles like Valorant this pair flies — around 341 FPS at 1080p, plenty for a high-refresh monitor. At the other end, a demanding AAA like Alan Wake 2 drops to ~11 FPS at 4K, which is where the GTX 1080 Ti's ceiling really shows. Overall, expect about 56 FPS average in AAA games at 1080p and around 23 FPS at 4K.
[CPU] Core i5-10400F
The Core i5-10400F scores 52/100 on this model's gaming scale, with 6 cores and 12 threads. In this pairing its job is to serve frames fast enough to never leave the graphics card waiting.
[GPU] GTX 1080 Ti
The GTX 1080 Ti (23/100 on the model's gaming scale) supplies the raster muscle of the build. Its 11 GB of GDDR5X set how far it can go on resolution and texture quality before video memory runs short.
A detail that's easy to overlook: The processor is considerably newer than the graphics card (3 years), so you have plenty of headroom to drop in a stronger GPU later. You're combining an Intel platform with an NVIDIA GPU — a perfectly valid mix that imposes no penalty.
DO YOU NEED TO CHANGE ANYTHING?
At 1440p the GTX 1080 Ti sets the frame rate. No card in our catalogue clears the bar we use for a recommendation: at least 25% more frames while the Core i5-10400F still keeps it fully fed. The closest, the NVIDIA RTX 5090, adds about 67% in this model. So there is no card we would tell you to buy for this pairing.
PRICE OF EACH PART
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SPECIFICATIONS
CATALOGUE DATA[CPU] Intel Core i5-10400F
- Cores6C / 12T
- Clock2.9 – 4.3 GHz
- TDP65 W
- SocketLGA1200
- Single-thread2,540
- Multi-thread12,096
- L3 cache12 MB
[GPU] NVIDIA GTX 1080 Ti
- VRAM11 GB GDDR5X
- Memory bus352-bit
- TDP250 W
- G3D Mark18,594
- Memory bandwidth484.4 GB/s
BOTTLENECK BY RESOLUTION
SYNERGY · AVERAGE FPSYour CPU (Core i5-10400F) and GPU (GTX 1080 Ti) are an exceptionally balanced match for gaming at 1920x1080. No realistic component swap would meaningfully improve this build.
Your GPU (GTX 1080 Ti) is the limiting factor at 2560x1440. In graphically demanding titles you will see lower frame rates; a faster GPU would deliver a clear improvement.
Your GPU (GTX 1080 Ti) severely limits the system at 3440x1440 (Ultrawide 21:9), leaving the Core i5-10400F heavily underused. A faster GPU would improve performance dramatically.
Your GPU (GTX 1080 Ti) severely limits the system at 5120x1440 (Super Ultrawide 32:9), leaving the Core i5-10400F heavily underused. A faster GPU would improve performance dramatically.
Your GPU (GTX 1080 Ti) severely limits the system at 4K, leaving the Core i5-10400F heavily underused. A faster GPU would improve performance dramatically.
ESTIMATED FPS BY GAME
1920x1080SYSTEM DIAGNOSTICS
POWER · VRAM & PCIe · RAMPOWER ESTIMATION
The Core i5-10400F (65W) and GTX 1080 Ti (250W) add up to roughly 315W under load. Adding 150W for the rest of the system gives 465W, and with a 30% transient margin, 650W is the safe figure.
VIDEO MEMORY AND PCIe
The GTX 1080 Ti's memory bus (352-bit) and bandwidth (484.4 GB/s) describe its own video memory, meaning how fast the card reads its 11 GB of GDDR5X, 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 i5-10400F bottleneck the NVIDIA GTX 1080 Ti?
At 1080p the two stay well balanced, whereas at 4K the GTX 1080 Ti is the limiting part (~60% GPU bottleneck). Overall, the GPU is the limit at high resolution, with 57% average efficiency across the 12 resolutions our model tests. 1440p is the highest resolution that stays playable, at about 40 FPS on average in AAA titles.
How many FPS do the Core i5-10400F and GTX 1080 Ti get at 1080p?
At 1080p this combination averages about 56 FPS in AAA games and around 215 FPS in esports titles. In Valorant we estimate up to 341 FPS.
Is this pairing good for 4K gaming?
Not for AAA titles at native high settings: about 23 FPS on average at 4K. It would take upscaling, much lower settings or faster hardware.
What power supply do I need for the Core i5-10400F and GTX 1080 Ti?
With an estimated combined draw of 315W across CPU and GPU, we recommend at least a 650W 80+ Gold supply (ideally ATX 3.0) to run with headroom.
Is the GTX 1080 Ti's 11 GB of VRAM enough?
11 GB covers all 11 tracked games at 1440p in the model; at 4K, 4 of them would need more, which costs frames or texture quality in those titles.