Core i7-5775C vs Xeon D-1531

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 i7-5775C vs Xeon D-1531 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 i7-5775C vs Xeon D-1531: Pros, Cons & Final Verdict

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

Core i7-5775C

2015

Why buy it

✅+300% larger total L3 cache (6 MB vs 1.5 MB).
✅Costs $1,691 less on MSRP ($366 MSRP vs $2,057 MSRP).
✅Delivers 463.5% more PassMark for each dollar spent, at 21.0 vs 3.7 PassMark/$ ($366 MSRP vs $2,057 MSRP).

Trade-offs

❌Less compelling for workstation-style loads than Xeon D-1531, which brings 6 cores / 12 threads.
❌44.4% higher power demand at 65W vs 45W.

Xeon D-1531

2015

Why buy it

✅Better for workstations and heavier parallel workloads: 6 cores / 12 threads.
✅Draws 45W instead of 65W, a 20W reduction.

Trade-offs

❌Lower PassMark (7,668 vs 7,688).
❌Smaller total L3 cache (1.5 MB vs 6 MB).
❌Lower PassMark per dollar, at 3.7 vs 21.0 PassMark/$ ($2,057 MSRP vs $366 MSRP).

Quick Answers

So, is Core i7-5775C better than Xeon D-1531?

Not really, because they are built for different jobs. Xeon D-1531 makes more sense for workstation-style multi-core throughput, while Core i7-5775C is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Core i7-5775C is the better pick. According to our tests, it delivers 0.8% 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, Core i7-5775C is the stronger fit. You are getting 0.3% better PassMark, backed by 4 cores and 8 threads. It also has the larger cache pool with 300% larger total L3 cache (6 MB vs 1.5 MB).

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

Core i7-5775C is the better buy right now. Core i7-5775C comes in $1,691 cheaper on MSRP at $366 MSRP versus $2,057 MSRP, and it still gives you a 0.8% average FPS lead across 50 shared CPU game tests in our data. It is also 463.5% better value on MSRP (21.0 vs 3.7 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Xeon D-1531 is the safer long-term CPU choice because it gives you more room to grow and a better platform outlook.

Core i7-5775C vs Xeon D-1531 Technical Specifications

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

Core i7-5775C

The Core i7-5775C is manufactured by Intel. It was released in 15 May 2015 (10 years ago). It is based on the Broadwell (2015−2019) architecture. It features 4 cores and 8 threads. Base frequency is 3.3 GHz, with boost up to 3.7 GHz. L3 cache: 6 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1150. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 7,688 points. Launch price was $366.

Xeon D-1531

The Xeon D-1531 is manufactured by Intel. It was released in 1 November 2015 (10 years ago). It is based on the Broadwell (2015−2019) architecture. It features 6 cores and 12 threads. Base frequency is 2.2 GHz, with boost up to 2.7 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: 7,668 points. Launch price was $348.

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Processing Power

The Core i7-5775C packs 4 cores / 8 threads, while the Xeon D-1531 offers 6 cores / 12 threads — the Xeon D-1531 has 2 more cores. Boost clocks reach 3.7 GHz on the Core i7-5775C versus 2.7 GHz on the Xeon D-1531 — a 31.3% clock advantage for the Core i7-5775C (base: 3.3 GHz vs 2.2 GHz). Both are built on the Broadwell (2015−2019) architecture using a 14 nm process. In PassMark, the Core i7-5775C scores 7,688 against the Xeon D-1531's 7,668 — a 0.3% lead for the Core i7-5775C. L3 cache: 6 MB (total) on the Core i7-5775C vs 1.5 MB (per core) on the Xeon D-1531.

Feature	Core i7-5775C	Xeon D-1531
Cores / Threads	4 / 8	6 / 12+50%
Boost Clock	3.7 GHz+37%	2.7 GHz
Base Clock	3.3 GHz+50%	2.2 GHz
L3 Cache	6 MB (total)+300%	1.5 MB (per core)
L2 Cache	256 kB (per core)	256K (per core)
Process	14 nm	14 nm
Architecture	Broadwell (2015−2019)	Broadwell (2015−2019)
PassMark	7,688	7,668

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Memory & Platform

The Core i7-5775C uses the LGA1150 socket (PCIe 3.0), while the Xeon D-1531 uses FCBGA1667 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i7-5775C	Xeon D-1531
Socket	LGA1150	FCBGA1667
PCIe Generation	PCIe 3.0	PCIe 3.0

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Value Analysis

At launch, the Core i7-5775C was priced at $366, while the Xeon D-1531 came in at $2057. On launch pricing ($366 vs $2057), Core i7-5775C was $1691 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i7-5775C delivers 21.0 pts/$ vs 3.7 pts/$ for the Xeon D-1531 — making the Core i7-5775C the 139.7% better value option.

Feature	Core i7-5775C	Xeon D-1531
MSRP	$366-82%	$2057
Performance per Dollar	21.0+468%	3.7
Release Date	2015	2015

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