Core Ultra 5 115U vs Xeon D-1577

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Core Ultra 5 115U vs Xeon D-1577 FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Core Ultra 5 115U vs Xeon D-1577: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Core Ultra 5 115U

2023

Why buy it

✅+566.7% larger total L3 cache (10 MB vs 1.5 MB).
✅Newer platform on FCBGA2049 with DDR5 support instead of FCBGA1667 and DDR4.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon D-1577 across 50 shared CPU benchmark tests.
❌Lower PassMark (11,518 vs 11,645).
❌Less compelling for workstation-style loads than Xeon D-1577, which brings 16 cores / 32 threads.

Xeon D-1577

2016

Why buy it

✅Better for gaming: +4.1% higher average FPS across 50 shared CPU benchmark tests.
✅Better for workstations and heavier parallel workloads: 16 cores / 32 threads.

Trade-offs

❌Smaller total L3 cache (1.5 MB vs 10 MB).
❌Older platform position on FCBGA1667 with DDR4, while Core Ultra 5 115U moves to FCBGA2049 and DDR5.

Quick Answers

So, is Xeon D-1577 better than Core Ultra 5 115U?

Not really, because they are built for different jobs. Xeon D-1577 makes more sense for workstation-style multi-core throughput, while Core Ultra 5 115U is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Xeon D-1577 is the better pick. According to our tests, it delivers 4.1% more average FPS across 50 shared CPU game tests.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Xeon D-1577 is the stronger fit. You are getting 1.1% better PassMark, backed by 16 cores and 32 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Xeon D-1577 still makes the most sense overall. Xeon D-1577 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 4.1% average FPS lead across 50 shared CPU game tests in our data.

Which one is more future-proof for 2026 and beyond?

Core Ultra 5 115U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2016), a healthier platform with FCBGA2049 and DDR5 instead of FCBGA1667, and 566.7% larger total L3 cache (10 MB vs 1.5 MB). That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core Ultra 5 115U vs Xeon D-1577 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Core Ultra 5 115U

The Core Ultra 5 115U is manufactured by Intel. It was released in 14 December 2023 (1 year ago). It is based on the Meteor Lake (2023) architecture. It features 8 cores and 10 threads. Base frequency is 1.5 GHz, with boost up to 4.2 GHz. L3 cache: 10 MB (total). L2 cache: 2 MB (per core). Built on 7 nm process technology. Socket: FCBGA2049. Thermal design power (TDP): + 10 MB. Memory support: DDR5 Depends on motherboard. Passmark benchmark score: 11,518 points. Launch price was $149.

Xeon D-1577

The Xeon D-1577 is manufactured by Intel. It was released in 24 February 2016 (9 years ago). It is based on the Broadwell (2015−2019) architecture. It features 16 cores and 32 threads. Base frequency is 1.3 GHz, with boost up to 2.1 GHz. L3 cache: 1.5 MB (per core). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1667. Thermal design power (TDP): 45 Watt. Memory support: DDR4, DDR3. Passmark benchmark score: 11,645 points. Launch price was $1,176.

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Processing Power

The Core Ultra 5 115U packs 8 cores / 10 threads, while the Xeon D-1577 offers 16 cores / 32 threads — the Xeon D-1577 has 8 more cores. Boost clocks reach 4.2 GHz on the Core Ultra 5 115U versus 2.1 GHz on the Xeon D-1577 — a 66.7% clock advantage for the Core Ultra 5 115U (base: 1.5 GHz vs 1.3 GHz). The Core Ultra 5 115U uses the Meteor Lake (2023) architecture (7 nm), while the Xeon D-1577 uses Broadwell (2015−2019) (14 nm). In PassMark, the Core Ultra 5 115U scores 11,518 against the Xeon D-1577's 11,645 — a 1.1% lead for the Xeon D-1577. L3 cache: 10 MB (total) on the Core Ultra 5 115U vs 1.5 MB (per core) on the Xeon D-1577.

Feature	Core Ultra 5 115U	Xeon D-1577
Cores / Threads	8 / 10	16 / 32+100%
Boost Clock	4.2 GHz+100%	2.1 GHz
Base Clock	1.5 GHz+15%	1.3 GHz
L3 Cache	10 MB (total)+567%	1.5 MB (per core)
L2 Cache	2 MB (per core)	256K (per core)+12700%
Process	7 nm-50%	14 nm
Architecture	Meteor Lake (2023)	Broadwell (2015−2019)
PassMark	11,518	11,645+1%

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Memory & Platform

The Core Ultra 5 115U uses the FCBGA2049 socket (PCIe 5.0), while the Xeon D-1577 uses FCBGA1667 (PCIe 3.0) — making them incompatible on the same motherboard.