Xeon E5-1607 v3 vs Xeon E5645

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.

Xeon E5-1607 v3 vs Xeon E5645 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.

Xeon E5-1607 v3 vs Xeon E5645: Pros, Cons & Final Verdict

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

Xeon E5-1607 v3

2014

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E5645 across 50 shared CPU benchmark tests.
❌Lower PassMark (4,932 vs 4,942).
❌Smaller total L3 cache (10 MB vs 12 MB).
❌75% higher power demand at 140W vs 80W.

Xeon E5645

2010

Why buy it

✅Better for gaming: +10.5% higher average FPS across 50 shared CPU benchmark tests.
✅+20% larger total L3 cache (12 MB vs 10 MB).
✅Draws 80W instead of 140W, a 60W reduction.

Trade-offs

❌Launch MSRP is still $294 MSRP, while Xeon E5-1607 v3 mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Xeon E5645 better than Xeon E5-1607 v3?

Yes. Xeon E5645 is the better all-around CPU here. It gives you a 10.5% average FPS lead across 50 shared CPU game tests in our data and 0.2% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Xeon E5645 is the better pick. According to our tests, it delivers 10.5% 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 E5645 is the stronger fit. You are getting 0.2% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 20% larger total L3 cache (12 MB vs 10 MB).

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

Xeon E5645 is the better buy right now. Xeon E5645 comes in at an unclear MSRP at $294 MSRP versus unclear MSRP, and it still gives you a 10.5% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (16.8 vs 0.0 PassMark/$), 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 E5-1607 v3 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2010). That makes it the safer long-term bet.

Xeon E5-1607 v3 vs Xeon E5645 Technical Specifications

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

Xeon E5-1607 v3

The Xeon E5-1607 v3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 4 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 10 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011-3. Thermal design power (TDP): 140 Watt. Memory support: DDR4-1333, DDR4-1600, DDR4-1866. Passmark benchmark score: 4,932 points. Launch price was $800.

Xeon E5645

The Xeon E5645 is manufactured by Intel. It was released in 16 March 2010 (15 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 6 cores and 12 threads. Base frequency is 2.4 GHz, with boost up to 2.67 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 4,942 points. Launch price was $294.

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Processing Power

The Xeon E5-1607 v3 packs 4 cores / 4 threads, while the Xeon E5645 offers 6 cores / 12 threads — the Xeon E5645 has 2 more cores. Boost clocks reach 3.1 GHz on the Xeon E5-1607 v3 versus 2.67 GHz on the Xeon E5645 — a 14.9% clock advantage for the Xeon E5-1607 v3 (base: 3.1 GHz vs 2.4 GHz). The Xeon E5-1607 v3 uses the Haswell-EP (2014−2015) architecture (22 nm), while the Xeon E5645 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Xeon E5-1607 v3 scores 4,932 against the Xeon E5645's 4,942 — a 0.2% lead for the Xeon E5645. L3 cache: 10 MB (total) on the Xeon E5-1607 v3 vs 12 MB (total) on the Xeon E5645.

Feature	Xeon E5-1607 v3	Xeon E5645
Cores / Threads	4 / 4	6 / 12+50%
Boost Clock	3.1 GHz+16%	2.67 GHz
Base Clock	3.1 GHz+29%	2.4 GHz
L3 Cache	10 MB (total)	12 MB (total)+20%
L2 Cache	256K (per core)	256 kB (per core)
Process	22 nm-31%	32 nm
Architecture	Haswell-EP (2014−2015)	Westmere-EP (2010−2011)
PassMark	4,932	4,942

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Memory & Platform

The Xeon E5-1607 v3 uses the LGA2011-3 socket (PCIe 3.0), while the Xeon E5645 uses LGA1366 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Xeon E5-1607 v3	Xeon E5645
Socket	LGA2011-3	LGA1366
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	—	DDR3-1333
Max RAM Capacity	—	288 GB
RAM Channels	—	3
ECC Support	—	Yes
PCIe Lanes	—	0