CPU_VS_GPU / 2026-09-11
Intel Core Ultra 5 245KFvsNVIDIA GTX 1080 Ti
Complete bottleneck analysis at 1080p, 1440p, Ultrawide (UWQHD/SUWQHD), and 4K with estimated FPS for popular games.
54%
ESTIMATED GPU BOTTLENECK
Your GPU (GTX 1080 Ti) severely limits the system at 2560x1440, leaving the Core Ultra 5 245KF heavily underused. A faster GPU would improve performance dramatically.
Load estimated by the model, not measured on your PC.
- PROCESSORIntel Core Ultra 5 245KF
- 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 (525 W) plus headroom.
DEEP-DIVE ANALYSIS
GENERATED BY THE ENGINEThis page breaks down, number by number, what happens when you run an Intel Core Ultra 5 245KF alongside an NVIDIA GTX 1080 Ti. The processor scores 83/100 and the graphics card 23/100 in our model — the interesting part is how they split the workload at each resolution.
Straight answer: 1440p, at about 40 FPS in AAA
The GTX 1080 Ti sets the limit at both ends of the range: a ~32% GPU bottleneck at 1080p that widens to ~73% at 4K. 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 379 FPS at 1080p.
Resolution reshuffles the priorities. At 1080p the Core Ultra 5 245KF'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: 68% efficiency at 1080p versus 27% at 4K.
Down to real numbers: In esports titles like Valorant this pair flies — around 773 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 Ultra 5 245KF
On the CPU side: the Core Ultra 5 245KF rates 83/100 for gaming in this model and brings 14 cores and 14 threads. At lower resolutions it's the one setting the pace for the whole system.
[GPU] GTX 1080 Ti
On the graphics side, the GTX 1080 Ti rates 23/100 for gaming in this model. Its 11 GB of GDDR5X set how far it can go on resolution and texture quality before video memory runs short. The higher the resolution, the more of the frame rate depends on it.
On the chemistry of the pair: The processor is considerably newer than the graphics card (7 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.
WHAT TO CHANGE, AND WHAT IT COSTS
At 1440p the GTX 1080 Ti sets the frame rate, and the Core Ultra 5 245KF 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 Ti 16GB: about 32% more in this model, with this processor and 16 GB. This processor keeps up with cards up to the NVIDIA RTX 5080; 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 Ultra 5 245KF
- Cores14C / 14T
- Clock4.2 – 5.2 GHz
- TDP125 W
- SocketLGA1851
- Single-thread4,713
- Multi-thread43,109
- L3 cache24 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 GPU (GTX 1080 Ti) severely limits the system at 1920x1080, leaving the Core Ultra 5 245KF heavily underused. A faster GPU would improve performance dramatically.
Your GPU (GTX 1080 Ti) severely limits the system at 2560x1440, leaving the Core Ultra 5 245KF heavily underused. A faster GPU would improve performance dramatically.
Your GPU (GTX 1080 Ti) severely limits the system at 3440x1440 (Ultrawide 21:9), leaving the Core Ultra 5 245KF 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 Ultra 5 245KF heavily underused. A faster GPU would improve performance dramatically.
Your GPU (GTX 1080 Ti) severely limits the system at 4K, leaving the Core Ultra 5 245KF heavily underused. A faster GPU would improve performance dramatically.
ESTIMATED FPS BY GAME
1920x1080SYSTEM DIAGNOSTICS
POWER · VRAM & PCIe · RAMPOWER ESTIMATION
The Core Ultra 5 245KF (125W) and GTX 1080 Ti (250W) add up to roughly 375W under load. Adding 150W for the rest of the system gives 525W, and with a 30% transient margin, 700W 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 Ultra 5 245KF bottleneck the NVIDIA GTX 1080 Ti?
The GTX 1080 Ti sets the limit at both ends of the range: a ~32% GPU bottleneck at 1080p that widens to ~73% at 4K. Overall, the GPU is the limit at high resolution, with 42% 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 Ultra 5 245KF and GTX 1080 Ti get at 1080p?
At 1080p this combination averages about 56 FPS in AAA games and around 379 FPS in esports titles. In Valorant we estimate up to 773 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 Ultra 5 245KF and GTX 1080 Ti?
With an estimated combined draw of 375W across CPU and GPU, we recommend at least a 700W 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.