U300 vs Xeon E3-1585 v5

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.

U300 vs Xeon E3-1585 v5 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.

U300 vs Xeon E3-1585 v5: Pros, Cons & Final Verdict

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

U300

2023

Why buy it

✅+1% higher PassMark.
✅Draws 55W instead of 65W, a 10W reduction.
✅Newer platform on FCBGA1744 with DDR5 support instead of BGA1440 and DDR4.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E3-1585 v5 across 50 shared CPU benchmark tests.
❌Less compelling for workstation-style loads than Xeon E3-1585 v5, which brings 4 cores / 8 threads.

Xeon E3-1585 v5

2016

Why buy it

✅Better for gaming: +8.2% higher average FPS across 50 shared CPU benchmark tests.
✅Better for workstations and heavier parallel workloads: 4 cores / 8 threads.

Trade-offs

❌Lower PassMark (8,408 vs 8,492).
❌18.2% higher power demand at 65W vs 55W.
❌Older platform position on BGA1440 with DDR4, while U300 moves to FCBGA1744 and DDR5.

Quick Answers

So, is U300 better than Xeon E3-1585 v5?

Not really, because they are built for different jobs. Xeon E3-1585 v5 makes more sense for workstation-style multi-core throughput, while U300 is the more practical desktop choice for gaming, platform cost, and everyday use.

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

For streaming, content creation, and heavier multitasking, U300 is the stronger fit. You are getting 1% better PassMark, backed by 5 cores and 6 threads.

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

U300 still makes the most sense overall. U300 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 1% better PassMark.

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

U300 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2016), a healthier platform with FCBGA1744 and DDR5 instead of BGA1440, and more multi-core headroom with 5 cores / 6 threads instead of 4/8. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

U300 vs Xeon E3-1585 v5 Technical Specifications

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

U300

The U300 is manufactured by Intel. It was released in 1 January 2023 (2 years ago). It features 5 cores and 6 threads. Max frequency: 4.4 GHz. L3 cache: 8 MB Intel® Smart Cache. Built on Intel 7 nm process technology. Socket: FCBGA1744. Thermal design power (TDP): 55 Watt. Memory support: DDR5-5200, DDR4-3200, LPDDR4x-4267. Passmark benchmark score: 8,492 points. Launch price was $149.

Xeon E3-1585 v5

The Xeon E3-1585 v5 is manufactured by Intel. It was released in 31 May 2016 (9 years ago). It is based on the Skylake-H (2015−2016) architecture. It features 4 cores and 8 threads. Base frequency is 3.5 GHz, with boost up to 3.9 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: BGA1440. Thermal design power (TDP): 65 Watt. Memory support: DDR3L,LPDDR3 1600 MHz, DDR4 2133 MHz at 1.2V. Passmark benchmark score: 8,408 points. Launch price was $556.

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Processing Power

The U300 packs 5 cores / 6 threads, while the Xeon E3-1585 v5 offers 4 cores / 8 threads — the U300 has 1 more core. Boost clocks reach 4.4 GHz on the U300 versus 3.9 GHz on the Xeon E3-1585 v5 — a 12% clock advantage for the U300. The Xeon E3-1585 v5 is built on the Skylake-H (2015−2016) architecture. In PassMark, the U300 scores 8,492 against the Xeon E3-1585 v5's 8,408 — a 1% lead for the U300. L3 cache: 8 MB Intel® Smart Cache on the U300 vs 8 MB (total) on the Xeon E3-1585 v5.

Feature	U300	Xeon E3-1585 v5
Cores / Threads	5 / 6+25%	4 / 8
Boost Clock	4.4 GHz+13%	3.9 GHz
Base Clock	—	3.5 GHz
L3 Cache	8 MB Intel® Smart Cache	8 MB (total)
L2 Cache	—	256 kB (per core)
Process	Intel 7 nm-50%	14 nm
Architecture	—	Skylake-H (2015−2016)
PassMark	8,492	8,408

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Memory & Platform

The U300 uses the FCBGA1744 socket (PCIe 4.0), while the Xeon E3-1585 v5 uses BGA1440 (PCIe 5.0) — making them incompatible on the same motherboard.