Phenom X4 9850B vs FX-8320

Place in the ranking	1549	2315
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	2.60	1.23
Architecture codename	Vishera (2012−2015)	Agena (2007−2008)
Release date	23 October 2012 (12 years ago)	August 2008 (16 years ago)

Detailed specifications

FX-8320 and Phenom X4 9850B basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	8 (Octa-Core)	4 (Quad-Core)
Threads	8	4
Base clock speed	3.5 GHz	no data
Boost clock speed	4 GHz	2.5 GHz
L1 cache	no data	128 KB (per core)
L2 cache	8192 KB	512 KB (per core)
L3 cache	no data	2 MB (shared)
Chip lithography	32 nm	65 nm
Die size	315 mm²	285 mm²
Maximum core temperature	61 °C	no data
Number of transistors	1,200 million	450 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-
P0 Vcore voltage	Min: 1.2 V - Max: 1.4 V	no data

Compatibility

Information on FX-8320 and Phenom X4 9850B compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	1
Socket	AM3+	AM2+
Power consumption (TDP)	125 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by FX-8320 and Phenom X4 9850B. You'll probably need this information if you require some particular technology.

AES-NI	+	-
FMA	+	-
AVX	+	-

Virtualization technologies

Virtual machine speed-up technologies supported by FX-8320 and Phenom X4 9850B are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by FX-8320 and Phenom X4 9850B. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

no data

Peripherals

Specifications and connection of peripherals supported by FX-8320 and Phenom X4 9850B.

PCIe version

n/a

no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

FX-8320 3.43
+179%

Phenom X4 9850B 1.23

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

FX-8320 5443
+180%

Phenom X4 9850B 1946

Gaming performance

Pros & cons summary

Performance score	3.43	1.23
Physical cores	8	4
Threads	8	4
Chip lithography	32 nm	65 nm
Power consumption (TDP)	125 Watt	95 Watt

FX-8320 has a 178.9% higher aggregate performance score, 100% more physical cores and 100% more threads, and a 103.1% more advanced lithography process.

Phenom X4 9850B, on the other hand, has 31.6% lower power consumption.

The FX-8320 is our recommended choice as it beats the Phenom X4 9850B in performance tests.

Should you still have questions on choice between FX-8320 and Phenom X4 9850B, ask them in Comments section, and we shall answer.