FX-8100 vs Ryzen 9 5900X

FX-8100

8 Cores8 Thrd95 WWMax: 3.7 GHz2011

Ryzen 9 5900X

12 Cores24 Thrd105 WWMax: 4.8 GHz2020

Performance Spectrum - CPU

FX-8100

8 / 8

4,095

0.0%

Ryzen Threadripper 3990X

Ryzen 9 5900X

12 / 24

38,955

+851.3%

Ryzen Threadripper 9960X

Ryzen Threadripper PRO 9975WX

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.

Value Upgrade Path

This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. The FX-8100 is positioned at rank #928 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.

MSRP is the manufacturer's suggested retail price.•
Avg price is the current average price collected from markets across the web.

Performance Per Dollar FX-8100

Ryzen 9 7950X

MSRP: $194|Avg: $20

22836%

Core i9-10900T

MSRP: $120|Avg: $5

21578%

Ryzen 3 PRO 4355GE

MSRP: $423|Avg: $5

15667%

Ryzen Threadripper 3960X

MSRP: $1399|Avg: $85

4720%

Ryzen 9 9950X

MSRP: $649|Avg: $129

3739%

Ryzen 5 8400F

MSRP: $303|Avg: $55

3271%

Ryzen 7 PRO 2700

MSRP: $299|Avg: $60

1873%

Ryzen 5 2600X

MSRP: $229|Avg: $55

1849%

Ryzen 3 PRO 5350G

MSRP: $150|Avg: $60

1683%

#10

Core Ultra 5 245KF

MSRP: $294|Avg: $189

1683%

#11

Ryzen 5 5500

MSRP: $159|Avg: $85

1664%

#12

Ryzen 5 3600

MSRP: $199|Avg: $80

1619%

#13

Core i3-9100E

MSRP: $202|Avg: $30

1597%

#14

Core Ultra 5 245K

MSRP: $319|Avg: $200

1590%

#15

Core i3-8300T

MSRP: $138|Avg: $25

1576%

#302

Core i7-6900K

MSRP: $1089|Avg: $1089

99%

#303

Core i7-5960X

MSRP: $999|Avg: $83

98%

#928

FX-8100

MSRP: $300|Avg: $50

100%

#930

Celeron E1400

MSRP: $53|Avg: $63

99%

#932

Pentium E6800

MSRP: $86|Avg: $10

98%

#933

Core i3-530

MSRP: $113|Avg: $15

98%

#935

Athlon II X3 405e

MSRP: $100|Avg: $10

98%

#936

Core i3-2105

MSRP: $138|Avg: $30

98%

#937

Core i3-3225

MSRP: $172|Avg: $167

97%

#938

Athlon II X3 400e

MSRP: $100|Avg: $10

97%

#939

Athlon II X2 245e

MSRP: $87|Avg: $15

96%

#940

Core i3-3220T

MSRP: $149|Avg: $146

96%

#941

Athlon II X2 240e

MSRP: $77|Avg: $77

96%

#942

Pentium G630T

MSRP: $79|Avg: $15

96%

#943

Core i7-3970X Extreme Edition

MSRP: $990|Avg: $175

95%

Based on actual market prices and performance synthetic scores.

Performance Per Dollar Ryzen 9 5900X

#141

Core i9-13900K

MSRP: $599|Avg: $500

105%

#142

Core i3-14100

MSRP: $134|Avg: $131

104%

#143

Ryzen 5 3400G

MSRP: $149|Avg: $80

103%

#144

Core i7-10700KF

MSRP: $405|Avg: $160

103%

#145

Core i5-11600K

MSRP: $262|Avg: $170

103%

#146

Core i7-13700K

MSRP: $409|Avg: $400

103%

#147

Ryzen 5 PRO 3400G

MSRP: $149|Avg: $80

102%

#148

Ryzen 7 PRO 2700X

MSRP: $329|Avg: $150

102%

#149

Core i9-12900KS

MSRP: $739|Avg: $385

102%

#150

Ryzen 5 5500X3D

MSRP: $185|Avg: $180

101%

#151

Core Ultra 7 265T

MSRP: $384|Avg: $362

101%

#152

Ryzen 3 3200GE

MSRP: $85|Avg: $64

101%

#153

Core i3-9100T

MSRP: $122|Avg: $50

101%

#154

Ryzen 5 4600G

MSRP: $154|Avg: $143

100%

#155

Core i7-13700T

MSRP: $384|Avg: $250

100%

#156

Ryzen 9 5900X

MSRP: $549|Avg: $350

100%

#157

Core i7-13700F

MSRP: $359|Avg: $345

100%

#158

Core i5-13600T

MSRP: $255|Avg: $255

99%

#159

Ryzen 5 3400GE

MSRP: $149|Avg: $80

99%

#160

Core i7-12700F

MSRP: $314|Avg: $275

99%

#161

Core i5-9400

MSRP: $192|Avg: $85

99%

#162

Core i3-13100

MSRP: $134|Avg: $128

99%

#163

Core i9-10910

MSRP: $488|Avg: $200

96%

#164

Core i5-14600T

MSRP: $255|Avg: $255

96%

#165

Core i5-11500T

MSRP: $192|Avg: $120

95%

#166

Ryzen 7 5700X3D

MSRP: $249|Avg: $249

95%

#167

Ryzen 3 8300GE

MSRP: $129|Avg: $129

95%

#168

Core i3-13100T

MSRP: $134|Avg: $122

94%

#169

Core i5-10600T

MSRP: $213|Avg: $110

94%

#170

Ryzen 3 3200G

MSRP: $100|Avg: $67

94%

#171

Core Ultra 9 285

MSRP: $589|Avg: $550

94%

Based on actual market prices and performance synthetic scores.

Performance Comparison

About PassMark

🏆 Chipversus Verdict

🚀 Performance Leadership

Generational Difference: This comparison involves processors from different technological eras. The Ryzen 9 5900X (2020) utilizes 7 nm, 12 nm technology and DDR4-3200, providing a fundamental performance advantage.

Insight	FX-8100	Ryzen 9 5900X
Gaming	❌ Lower gaming performance	✅ Superior gaming performance
Workstation	❌ Weaker in multi-core tasks	✅ Better multi-core power
Price	✅ More affordable ($50)	⚠️ Higher cost ($350)
Longevity	🛑 Legacy (Zambezi (2011−2012) / 32 nm)	✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm)

💎 Value Proposition

The FX-8100 (2011) relies on 32 nm technology and DDR3, placing it in a different performance category relative to modern standards.

Insight	FX-8100	Ryzen 9 5900X
Cost Efficiency	❌ Lower cost efficiency	✅ Better overall value (+36%)
Upfront Cost	✅ More affordable ($50)	⚠️ Higher cost ($350)

Performance Check

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.

FX-8100 Benchmark Check

Ryzen 9 5900X Benchmark Check

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of FX-8100 and Ryzen 9 5900X

FX-8100

The FX-8100 is manufactured by AMD. It was released in 12 October 2011 (14 years ago). It is based on the Zambezi (2011−2012) architecture. It features 8 cores and 8 threads. Base frequency is 2.8 GHz, with boost up to 3.7 GHz. L3 cache: 8 MB (total). L2 cache: 8 MB. Built on 32 nm process technology. Socket: AM3+. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 4,095 points. Launch price was $69.

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.

⚡

Processing Power

The FX-8100 packs 8 cores / 8 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 4 more cores. Boost clocks reach 3.7 GHz on the FX-8100 versus 4.8 GHz on the Ryzen 9 5900X — a 25.9% clock advantage for the Ryzen 9 5900X (base: 2.8 GHz vs 3.7 GHz). The FX-8100 uses the Zambezi (2011−2012) architecture (32 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the FX-8100 scores 4,095 against the Ryzen 9 5900X's 38,955 — a 162% lead for the Ryzen 9 5900X. Geekbench 6 single-core — the metric most relevant to gaming — records 455 vs 2,174, a 130.8% lead for the Ryzen 9 5900X that directly translates to higher frame rates. Multi-core Geekbench: 1,621 vs 11,888 (152% advantage for the Ryzen 9 5900X). L3 cache: 8 MB (total) on the FX-8100 vs 64 MB on the Ryzen 9 5900X.

Feature	FX-8100	Ryzen 9 5900X
Cores / Threads	8 / 8	12 / 24+50%
Boost Clock	3.7 GHz	4.8 GHz+30%
Base Clock	2.8 GHz	3.7 GHz+32%
L3 Cache	8 MB (total)	64 MB+700%
L2 Cache	8 MB+1500%	512K (per core)
Process	32 nm	7 nm, 12 nm-78%
Architecture	Zambezi (2011−2012)	Vermeer (Zen3) (2020−2022)
PassMark	4,095	38,955+851%
Cinebench R23 Multi	—	21,000
Geekbench 6 Single	455	2,174+378%
Geekbench 6 Multi	1,621	11,888+633%

🧠

Memory & Platform

The FX-8100 uses the AM3+ socket (PCIe 2.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1866 on the FX-8100 versus DDR4-3200 on the Ryzen 9 5900X — the Ryzen 9 5900X supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 16 GB — 155.6% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (FX-8100) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD 990FX,AMD 970 (FX-8100) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).

Feature	FX-8100	Ryzen 9 5900X
Socket	AM3+	AM4
PCIe Generation	PCIe 2.0	PCIe 4.0+100%
Max RAM Speed	DDR3-1866	DDR4-3200+33%
Max RAM Capacity	16 GB	128 GB+700%
RAM Channels	2	2
ECC Support	❌	✅
PCIe Lanes	0	24

🔧

Advanced Features

Both processors feature an unlocked multiplier for overclocking. Both support AMD-V virtualization. Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K.

Feature	FX-8100	Ryzen 9 5900X
Integrated GPU	No	No
Unlocked	Yes	Yes
AVX-512	No	No
Virtualization	AMD-V	AMD-V
Target Use	—	Workstation

💰

Value Analysis

The FX-8100 launched at $300 MSRP, while the Ryzen 9 5900X debuted at $549. At current prices ($50 vs $350), the FX-8100 is $300 cheaper. In terms of value (PassMark points per dollar), the FX-8100 delivers 81.9 pts/$ vs 111.3 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 30.4% better value option.