Ryzen 9 5900X vs Xeon E5-1620

CPU

GPU

Ryzen 9 5900X

12 Cores24 Thrd105 WWMax: 4.8 GHz2020

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Xeon E5-1620

4 Cores8 Thrd130 WWMax: 3.8 GHz2012

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Ryzen 9 5900X vs Xeon E5-1620 Performance Spectrum

Ryzen 9 5900X

12 / 24

38,955

+566.1%

Ryzen Threadripper 9960X

Ryzen Threadripper PRO 9975WX

Xeon E5-1620

4 / 8

5,848

0.0%

About PassMark

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.

Ryzen 9 5900X vs Xeon E5-1620 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.

Ryzen 9 5900X vs Xeon E5-1620: Pros, Cons & Final Verdict

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

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +150.3% higher average FPS across 50 shared CPU benchmark tests.
✅+540% larger total L3 cache (64 MB vs 10 MB).
✅Costs $336 less on MSRP ($549 MSRP vs $885 MSRP).
✅Delivers 973.8% more PassMark for each dollar spent, at 71.0 vs 6.6 PassMark/$ ($549 MSRP vs $885 MSRP).
✅Draws 105W instead of 130W, a 25W reduction.

Trade-offs

❌Less compelling for workstation-style loads than Xeon E5-1620, which brings 4 cores / 8 threads and 40 PCIe lanes.

Xeon E5-1620

2012

Why buy it

✅Better for workstations and heavier parallel workloads: 4 cores / 8 threads, plus 40 PCIe lanes vs 24.
✅66.7% more PCIe lanes (40 vs 24) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
❌Lower Cinebench R23 multi-core (3,469 vs 21,000).
❌Smaller total L3 cache (10 MB vs 64 MB).
❌Lower PassMark per dollar, at 6.6 vs 71.0 PassMark/$ ($885 MSRP vs $549 MSRP).
❌23.8% higher power demand at 130W vs 105W.

Quick Answers

So, is Ryzen 9 5900X better than Xeon E5-1620?

Not really, because they are built for different jobs. Xeon E5-1620 makes more sense for workstation-style multi-core throughput, while Ryzen 9 5900X is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Ryzen 9 5900X is the better pick. According to our tests, it delivers 150.3% 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, Ryzen 9 5900X is the stronger fit. You are getting 505.4% better Cinebench R23 multi-core, backed by 12 cores and 24 threads. It also has the larger cache pool with 540% larger total L3 cache (64 MB vs 10 MB).

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

Ryzen 9 5900X is the better buy right now. Ryzen 9 5900X comes in $336 cheaper on MSRP at $549 MSRP versus $885 MSRP, and it still gives you a 150.3% average FPS lead across 50 shared CPU game tests in our data. It is also 973.8% better value on MSRP (71.0 vs 6.6 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Ryzen 9 5900X makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2012), 540% larger total L3 cache (64 MB vs 10 MB), and more multi-core headroom with 12 cores / 24 threads instead of 4/8. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Ryzen 9 5900X vs Xeon E5-1620 Technical Specifications

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

Ryzen 9 5900X

The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.

Xeon E5-1620

The Xeon E5-1620 is manufactured by Intel. It was released in 6 March 2012 (13 years ago). It is based on the Sandy Bridge-E (2011−2013) architecture. It features 4 cores and 8 threads. Base frequency is 3.6 GHz, with boost up to 3.8 GHz. L3 cache: 10240 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 5,848 points. Launch price was $313.

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Processing Power

The Ryzen 9 5900X packs 12 cores / 24 threads, while the Xeon E5-1620 offers 4 cores / 8 threads — the Ryzen 9 5900X has 8 more cores. Boost clocks reach 4.8 GHz on the Ryzen 9 5900X versus 3.8 GHz on the Xeon E5-1620 — a 23.3% clock advantage for the Ryzen 9 5900X (base: 3.7 GHz vs 3.6 GHz). The Ryzen 9 5900X uses the Vermeer (Zen3) (2020−2022) architecture (7 nm, 12 nm), while the Xeon E5-1620 uses Sandy Bridge-E (2011−2013) (32 nm). In PassMark, the Ryzen 9 5900X scores 38,955 against the Xeon E5-1620's 5,848 — a 147.8% lead for the Ryzen 9 5900X. Cinebench R23 multi-core: 21,000 vs 3,469 (143.3% advantage for the Ryzen 9 5900X). Geekbench 6 single-core — the metric most relevant to gaming — records 2,174 vs 612, a 112.1% lead for the Ryzen 9 5900X that directly translates to higher frame rates. Multi-core Geekbench: 11,888 vs 2,250 (136.3% advantage for the Ryzen 9 5900X). L3 cache: 64 MB on the Ryzen 9 5900X vs 10240 kB (total) on the Xeon E5-1620.

Feature	Ryzen 9 5900X	Xeon E5-1620
Cores / Threads	12 / 24+200%	4 / 8
Boost Clock	4.8 GHz+26%	3.8 GHz
Base Clock	3.7 GHz+3%	3.6 GHz
L3 Cache	64 MB+540%	10240 kB (total)
L2 Cache	512K (per core)+100%	256 kB (per core)
Process	7 nm, 12 nm-78%	32 nm
Architecture	Vermeer (Zen3) (2020−2022)	Sandy Bridge-E (2011−2013)
PassMark	38,955+566%	5,848
Cinebench R23 Multi	21,000+505%	3,469
Geekbench 6 Single	2,174+255%	612
Geekbench 6 Multi	11,888+428%	2,250

🧠

Memory & Platform

The Ryzen 9 5900X uses the AM4 socket (PCIe 4.0), while the Xeon E5-1620 uses LGA2011 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the Ryzen 9 5900X versus DDR3-1600 on the Xeon E5-1620 — the Ryzen 9 5900X supports 100% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5-1620 supports up to 375 GB of RAM compared to 128 GB — 193% more capacity for professional workloads. Memory channels: 2 (Ryzen 9 5900X) vs 4 (Xeon E5-1620). PCIe lanes: 24 (Ryzen 9 5900X) vs 40 (Xeon E5-1620) — the Xeon E5-1620 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X) and Intel C600,Intel X79 (Xeon E5-1620).

Feature	Ryzen 9 5900X	Xeon E5-1620
Socket	AM4	LGA2011
PCIe Generation	PCIe 4.0+100%	PCIe 2.0
Max RAM Speed	DDR4-3200+100%	DDR3-1600
Max RAM Capacity	128 GB	375 GB+193%
RAM Channels	2	4+100%
ECC Support	Yes	Yes
PCIe Lanes	24	40+67%

🔧

Advanced Features

Virtualization support: AMD-V (Ryzen 9 5900X) vs true (Xeon E5-1620). Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K.

Feature	Ryzen 9 5900X	Xeon E5-1620
Integrated GPU	No	No
Unlocked	Yes	—
AVX-512	No	No
Virtualization	AMD-V	true
Target Use	Workstation	—

💰

Value Analysis

At launch, the Ryzen 9 5900X was priced at $549, while the Xeon E5-1620 came in at $885. On launch pricing ($549 vs $885), Ryzen 9 5900X was $336 cheaper. In terms of value on MSRP (PassMark points per dollar), the Ryzen 9 5900X delivers 71.0 pts/$ vs 6.6 pts/$ for the Xeon E5-1620 — making the Ryzen 9 5900X the 165.9% better value option.

Feature	Ryzen 9 5900X	Xeon E5-1620
MSRP	$549-38%	$885
Performance per Dollar	71.0+976%	6.6
Release Date	2020	2012

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