Core i5-1145GRE vs Xeon E3-1275 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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

Core i5-1145GRE

2020

Why buy it

✅Draws 28W instead of 80W, a 52W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E3-1275 v5 across 4 shared CPU benchmark tests.
❌Lower PassMark (8,207 vs 8,291).
❌Launch MSRP is still $362 MSRP, while Xeon E3-1275 v5 mostly shows up through inconsistent older-market listings.

Xeon E3-1275 v5

2015

Why buy it

✅Better for gaming: +6.7% higher average FPS across 4 shared CPU benchmark tests.

Trade-offs

❌185.7% higher power demand at 80W vs 28W.

Core i5-1145GRE

2020

Xeon E3-1275 v5

2015

Why buy it

✅Draws 28W instead of 80W, a 52W reduction.

Why buy it

✅Better for gaming: +6.7% higher average FPS across 4 shared CPU benchmark tests.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E3-1275 v5 across 4 shared CPU benchmark tests.
❌Lower PassMark (8,207 vs 8,291).
❌Launch MSRP is still $362 MSRP, while Xeon E3-1275 v5 mostly shows up through inconsistent older-market listings.

Trade-offs

❌185.7% higher power demand at 80W vs 28W.

Quick Answers

So, is Xeon E3-1275 v5 better than Core i5-1145GRE?

Not in a simple one-size-fits-all way. Xeon E3-1275 v5 makes more sense for workstation-style multi-core throughput, while Core i5-1145GRE is the better mainstream desktop choice for gaming, platform cost, and day-to-day practicality.

Which one is better for gaming?

If gaming is the priority, Xeon E3-1275 v5 is the better pick here. According to our tests, it delivers 6.7% more average FPS across 4 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Xeon E3-1275 v5 is the better fit. You are getting 1% better PassMark, backed by 4 cores and 8 threads.

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

Xeon E3-1275 v5 is the smarter buy by a wide margin for any fresh desktop build. Xeon E3-1275 v5 is at an unclear MSRP at unclear MSRP versus $362 MSRP, and it gives you a 6.7% average FPS lead across 4 shared CPU game tests in our data. Core i5-1145GRE only looks good on raw value math because it is a cheap legacy laptop CPU, not because it is a serious desktop gaming option. It simply cannot keep up with modern games, especially when the gap is already 6.7% in the shared gaming data.

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

Core i5-1145GRE is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2015). That makes it the safer long-term pick.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Core i5-1145GRE Benchmark Check

Xeon E3-1275 v5 Benchmark Check

Path of Exile 2

Preset	Core i5-1145GRE	Xeon E3-1275 v5
1080p
low	168 FPS	207 FPS
medium	136 FPS	164 FPS
high	109 FPS	131 FPS
ultra	84 FPS	92 FPS
1440p
low	144 FPS	179 FPS
medium	116 FPS	140 FPS
high	92 FPS	110 FPS
ultra	71 FPS	77 FPS
4K
low	66 FPS	71 FPS
medium	56 FPS	60 FPS
high	44 FPS	47 FPS
ultra	35 FPS	37 FPS

Open Core i5-1145GRE Open Xeon E3-1275 v5

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-1145GRE	Xeon E3-1275 v5
1080p
low	147 FPS	207 FPS
medium	127 FPS	186 FPS
high	116 FPS	166 FPS
ultra	100 FPS	128 FPS
1440p
low	130 FPS	189 FPS
medium	113 FPS	162 FPS
high	106 FPS	144 FPS
ultra	90 FPS	116 FPS
4K
low	102 FPS	149 FPS
medium	92 FPS	132 FPS
high	78 FPS	109 FPS
ultra	66 FPS	81 FPS

Open Core i5-1145GRE Open Xeon E3-1275 v5

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-1145GRE	Xeon E3-1275 v5
1080p
low	205 FPS	207 FPS
medium	205 FPS	207 FPS
high	205 FPS	207 FPS
ultra	205 FPS	207 FPS
1440p
low	205 FPS	207 FPS
medium	205 FPS	207 FPS
high	205 FPS	207 FPS
ultra	205 FPS	207 FPS
4K
low	205 FPS	207 FPS
medium	205 FPS	207 FPS
high	205 FPS	207 FPS
ultra	205 FPS	207 FPS

Open Core i5-1145GRE Open Xeon E3-1275 v5

League of Legends

League of Legends

Valorant

Preset	Core i5-1145GRE	Xeon E3-1275 v5
1080p
low	205 FPS	207 FPS
medium	205 FPS	207 FPS
high	205 FPS	207 FPS
ultra	205 FPS	207 FPS
1440p
low	205 FPS	207 FPS
medium	205 FPS	207 FPS
high	205 FPS	207 FPS
ultra	205 FPS	207 FPS
4K
low	205 FPS	207 FPS
medium	205 FPS	207 FPS
high	205 FPS	207 FPS
ultra	205 FPS	207 FPS

Open Core i5-1145GRE Open Xeon E3-1275 v5

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-1145GRE and Xeon E3-1275 v5

Core i5-1145GRE

The Core i5-1145GRE is manufactured by Intel. It was released in 2 September 2020 (5 years ago). It is based on the Tiger Lake-U (2020−2021) architecture. It features 4 cores and 8 threads. Base frequency is 1.5 GHz, with boost up to 4.1 GHz. L3 cache: 8 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm process technology. Socket: FCBGA1449. Thermal design power (TDP): 28 Watt. Memory support: DDR4, LPDDR4X. Passmark benchmark score: 8,207 points. Launch price was $362.

Xeon E3-1275 v5

The Xeon E3-1275 v5 is manufactured by Intel. It was released in 19 October 2015 (10 years ago). It is based on the Skylake-DT (2015) architecture. It features 4 cores and 8 threads. Base frequency is 3.6 GHz, with boost up to 4 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 80 Watt. Memory support: DDR4-1866/2133, DDR3L-1333/1600. Passmark benchmark score: 8,291 points. Launch price was $350.

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Processing Power

Both the Core i5-1145GRE and Xeon E3-1275 v5 share an identical 4-core/8-thread configuration. Boost clocks reach 4.1 GHz on the Core i5-1145GRE versus 4 GHz on the Xeon E3-1275 v5 — a 2.5% clock advantage for the Core i5-1145GRE (base: 1.5 GHz vs 3.6 GHz). The Core i5-1145GRE uses the Tiger Lake-U (2020−2021) architecture (10 nm), while the Xeon E3-1275 v5 uses Skylake-DT (2015) (14 nm). In PassMark, the Core i5-1145GRE scores 8,207 against the Xeon E3-1275 v5's 8,291 — a 1% lead for the Xeon E3-1275 v5. Both processors carry 8 MB (total) of L3 cache.

Feature	Core i5-1145GRE	Xeon E3-1275 v5
Cores / Threads	4 / 8	4 / 8
Boost Clock	4.1 GHz+2%	4 GHz
Base Clock	1.5 GHz	3.6 GHz+140%
L3 Cache	8 MB (total)	8 MB (total)
L2 Cache	1.25 MB (per core)+400%	256 kB (per core)
Process	10 nm-29%	14 nm
Architecture	Tiger Lake-U (2020−2021)	Skylake-DT (2015)
PassMark	8,207	8,291+1%

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Memory & Platform

The Core i5-1145GRE uses the FCBGA1449 socket (PCIe 4.0), while the Xeon E3-1275 v5 uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard.