Modern AAA titles, 4K streaming, content creation, and AI-driven applications demand more than yesterday’s hardware. Mid-range PCs struggle to maintain smooth frame rates at ultra settings, suffer thermals under long sessions, and leave gamers craving headroom for next-gen titles. Meanwhile, creators need simultaneous video editing, livestream encoding, and heavy-compute tasks without stutters or system slowdowns.
In this article, we’ll dissect the HP OMEN 45L Gaming PC Intel Core Ultra 9 from top to bottom: its flagship 14-core/20-thread CPU, blistering NVIDIA GeForce RTX 5090 graphics, Omen Cryo Chamber cooling, upgradability, noise and power characteristics, benchmark performance, build quality, and value proposition. You’ll learn why this rig stands out in the crowded high-end desktop market and how it future-proofs your gaming and content pipeline for years to come.
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Core Specifications and Architectural Overview
At the heart of the OMEN 45L sits the Intel Core Ultra 9-14500K, boasting 14 performance cores and 20 threads—Intel’s latest hybrid architecture combining high-frequency P-cores with efficient E-cores. Base clock sits at 3.5 GHz, with boost up to 5.4 GHz under single-thread loads. L2 and L3 caches total 40 MB, ensuring minimal cache misses and buttery-smooth multitasking.
Paired with 64 GB of DDR5-5600 dual-channel RAM, the system delivers up to 90 GB/s memory bandwidth—critical for massive scene edits, large datasets, and rapid context switching during content creation. Storage includes a 2 TB PCIe 4.0 NVMe SSD, offering sequential read speeds of 7,000 MB/s and write speeds of 5,000 MB/s, reducing load times to near-instantaneous in both games and professional software.
Graphics duties fall to the NVIDIA GeForce RTX 5090 24 GB, featuring 10,752 CUDA cores, 48 GB/s GDDR7 memory bandwidth, and full-suite ray-tracing acceleration via third-gen RT cores. DLSS 3 frame generation further amplifies performance in supported titles, delivering 4K gaming at consistent 60+ FPS even on ultra-demanding settings.
All components are housed in the signature 45L chassis with tempered-glass side panel. A dedicated Omen Cryo Chamber encapsulates the CPU cooler, funneling cool air directly to its radiator for up to 30% lower CPU temperatures under load compared to open-air setups.
Cooling Innovations: The Omen Cryo Chamber
Thermals can throttle performance in compact desktops. HP’s Cryo Chamber isolates your CPU’s all-in-one cooler in its own air-sealed compartment. Cool air is drawn from front intakes, channeled across a 240 mm radiator, and exhausted through the top, preventing heat soak into GPU or motherboard sections.
This design maintains CPU package temperatures below 75 °C during sustained 100% multi-threaded workloads—ideal for long gaming marathons or multi-hour 4K video exports. GPU cooling relies on a three-fan front-to-back airflow, keeping RTX 5090 cores under 70 °C even during intensive ray-tracing sessions. System fan curves are tuned for near-silence at idle and moderate noise—around 38 dBA—at full bore, meaning you’ll hear your game audio crystal-clear without fan drone.
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Build Quality and Accessibility
The 45 L chassis feels rock-solid, with steel panels, reinforced tempered glass, and thumb-screw fasteners for tool-free side-panel removal. Drive bays, DIMM slots, and expansion slots are all keyed and tool-less, simplifying upgrades. A magnetic dust filter covers the front intakes; filters on the top and bottom slide out for quick cleaning.
Cable management is exemplary: flat black cables route through rear grommets, keeping airflow unobstructed and aesthetics clean. The power supply—an 850 W 80 Plus Gold unit—is mounted to minimize heat transfer into the main chamber, and modular connectors reduce cable clutter.
Benchmark Performance: Real-World Metrics
- 3DMark Time Spy (4K): ~18,500 GPU score; CPU score ~23,000—placing it in the top 5 percentile of all tested systems.
- Shadow of the Tomb Raider (4K Ultra, DX12): 78 FPS average, with 65 FPS 1 percent lows—smooth 4K gameplay even in RT mode.
- Cyberpunk 2077 (4K Ultra RT Medium, DLSS Quality): 60 FPS average, 50 FPS 1 percent lows—visually stunning with stable framerates.
- Blender BMW Benchmark: 75 seconds—20% faster than last-gen high-end desktops.
- DaVinci Resolve 18 8K Export: 2 min 30 sec for 8K ProRes timeline—blazing export times for content creators.
These results showcase a system that blurs the line between elite gaming and professional workstation—it handles both with ease.
Connectivity and Expansion Options
Front I/O includes: two USB-C 3.2 Gen 2 ports (10 Gbps), two USB-A 3.2 Gen 1, a combo audio jack, and a dedicated microphone jack. Rear I/O adds: four USB-A 3.2 Gen 1, two USB-A 2.0, one USB-C Thunderbolt 4 (40 Gbps), 2.5 GbE LAN, HDMI 2.1, and DisplayPort 1.4 outputs native to the RTX 5090. Audio jacks comprise optical S/PDIF out plus line in/out.
The motherboard features two M.2 slots (one occupied, one free), four SATA 3 ports, three full-length PCIe 4.0 slots, and two x1 slots for capture cards or networking expansions. Wi-Fi 7 and Bluetooth 5.3 come via an M.2 card, ensuring future wireless standards compatibility.
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Upgrade Path and Future-Proofing
Beyond the extra M.2 bay and SATA ports, OMEN 45L supports CPU upgrades up to Intel Core Ultra 9 14700K using the same LGA 1851 socket. GPU swaps are straightforward thanks to ample clearance (up to 360 mm length) and support for dual-slot cards. Users can add a 360 mm AIO or more case fans via built-in headers.
Power headroom remains plentiful: the 850 W PSU can handle an RTX 5090 Ti or dual-GPU setups in the future. The chassis also accommodates up to 128 GB RAM, 3 TB additional NVMe storage, and fan-oriented mods—making it a true long-term investment.
Value Proposition: Is It Worth the Price?
Retailing around £2,800 (configuration dependent), the OMEN 45L sits at the top of mainstream gaming PCs. Comparable custom-built rigs with similar specs often exceed £3,200 once labor, warranty, and software bundles are included. HP’s offering packs professional Windows 11 Pro, Microsoft Copilot integration, OMEN Gaming Hub software for system tuning, and a one-year onsite warranty—features that DIY builders rarely match out of the box.
When you factor in ease of setup, industrial design, premium support, and the Cryo Chamber innovation, the price premium over bare-bones custom PCs narrows significantly—making the 45L an attractive proposition for enthusiasts who value turnkey performance.
Conclusion
The HP OMEN 45L Gaming PC Intel Core Ultra 9 masterfully combines bleeding‐edge CPU and GPU hardware, innovative Cryo Chamber cooling, professional‐grade build quality, and thoughtful upgradability into one sleek chassis. Whether you’re chasing 4K/60 FPS with ultra ray tracing, compiling 8K videos in record time, or planning future component swaps, this desktop delivers consistent, silent power. For gamers and creators seeking a future-proof, all‐in-one powerhouse, the OMEN 45L sets a new benchmark in high-end desktops.
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FAQ
- Can I upgrade to an RTX 5090 Ti?
Yes—the 850 W PSU and 360 mm GPU clearance support higher-end cards. - How noisy is the system under load?
Peaks around 38 dBA during intensive gaming; near-silent at idle. - Does it support liquid-cooling upgrades?
Yes—top radiator mounts accept up to 360 mm AIO coolers. - Is Microsoft Copilot included?
Windows 11 Pro ships with Copilot integration for AI-driven productivity. - What warranty does HP provide?
One-year onsite parts and labor, with optional extensions available. - Can I add more storage?
Yes—one free M.2 slot and four SATA 3 ports for SSDs or HDDs. - Does it come overclocked?
CPU and GPU run at Intel/NVIDIA stock boosts; OC options available via OMEN Gaming Hub. - Is Wi-Fi 7 enabled by default?
Yes—built-in Wi-Fi 7 and Bluetooth 5.3 via onboard M.2 card.
