AMD Phenom II X4 B93

The AMD Phenom II X4 B93 is a 4-core, 4-thread desktop processor built on the K10 architecture (codenamed Deneb) and released on September 30, 2009. It runs at a fixed base clock of 2.80 GHz with no boost capability, has a 95W TDP, and uses the AMD Socket AM3. With an average benchmark score of 631 and a percentile rank of 15 among all CPUs, this end-of-life part sits firmly in the lower performance tier, yet it remains a functional option for legacy systems and basic computing tasks.

Who Should Consider It

Benchmark results indicate that the B93 is best suited for workloads that do not demand high single-thread throughput. Its Cinebench R20 single-core score of 108 and R23 single-core score of 259 are low by modern standards, so applications like contemporary web browsers, office suites, or even older games that rely heavily on one or two threads will likely feel sluggish. The multi-core scores are comparatively stronger: Cinebench R20 multicore reaches 770, and R23 multicore reaches 1835. This suggests that the processor can make use of all four cores when a task is explicitly multi-threaded, but the absolute performance remains modest.

Given its 15th percentile ranking and end-of-life status, the B93 is not a reasonable choice for new builds. Instead, it appeals to users maintaining vintage AM3 platforms, running legacy software that predates modern instruction sets, or needing a low-cost secondary machine for word processing, spreadsheet work, or light media playback. Because the CPU itself does not include integrated graphics—though certain motherboards provide a chipset-based display output—a discrete graphics card is required for any visual output. Office productivity and simple data entry are within its reach, but video editing, 3D rendering, or modern gaming are clearly outside its capability envelope.

Single-Thread vs Multi-Thread Behavior

The split between single-core and multi-core performance is revealing. In Cinebench R20, the multicore score of 770 is roughly seven times the single-core score of 108, indicating that the processor scales well across its four physical cores. Similarly, the R23 multicore score of 1835 is about seven times the single-core score of 259. This strong scaling suggests that the K10 architecture and the shared 6 MB L3 cache allow efficient distribution of parallel workloads. However, the absolute numbers are low because the base clock of 2.80 GHz is fixed—there is no boost clock to raise frequency under light loads.

For real-world applications, this means that heavily threaded tasks such as batch photo processing or older video encoding tools will see better utilization than single-threaded tasks. Yet the lack of any turbo mechanism leaves single-thread performance strictly tied to the 2.80 GHz clock and the 45nm process, which limits instruction-per-clock efficiency. Users running modern single-threaded software will experience noticeable delays, while those who can parallelize their work across all four cores will get closer to the processor's maximum throughput—though that maximum is still far below contemporary CPUs.

Power and Thermals

The B93 is rated at a 95W TDP, a figure that places it in the mainstream power envelope of its era. On a 45nm process with 758 million transistors and a 258 mm² die, this power draw is consistent with quad-core designs from 2009. The absence of a boost clock means power consumption remains relatively stable under load, without the frequency spikes seen in modern processors. A standard air cooler—such as a tower-style heatsink or a basic downdraft unit—is sufficient to keep temperatures within safe limits. Because the processor is end-of-life, many compatible coolers are readily available on the second-hand market. The 95W TDP also implies that motherboard VRM requirements are modest, making it easy to pair with older AM3 boards that were designed for similar power levels.

Platform and Compatibility

The B93 uses the AMD Socket AM3, which natively supports both DDR2 and DDR3 memory in a dual-channel configuration. The memory bandwidth is rated at 21.3 GB/s, a figure that reflects the era's dual-channel DDR2/DDR3 controllers. This flexibility allows the processor to be installed in a wide range of AM3 motherboards, from those with DDR2 slots to newer boards with DDR3. The PCIe interface is Gen 2, which is sufficient for graphics cards of that generation but will bottleneck modern high-bandwidth GPUs. ECC memory is not supported, so the processor is not suited for error-correcting memory workloads.

The multiplier is locked, meaning the CPU cannot be overclocked by adjusting the multiplier; any frequency increase would require raising the base clock, which is less straightforward and often limited by the motherboard. The integrated graphics are not part of the CPU itself—the fact pack notes that display output is available "on certain motherboards (Chipset feature)," so a discrete GPU is generally required. As an end-of-life product, the B93 has no forward upgrade path within the AM3 platform; users seeking better performance would need to switch to a newer socket or a different platform entirely.

How It Compares

The B93's average benchmark score of 631 places it in a tight cluster with four nearest rivals, each within 1% of its performance. Against the AMD Athlon II X4 630, which scores 635, the B93 is 0.7% slower. That difference is negligible, and both processors deliver essentially identical throughput in everyday tasks. The Intel Xeon L5420, scoring 626, is 0.7% faster than the B93; this server-oriented processor edges out the B93 by a hair. The Intel Core i7-3517U, a mobile chip with a score of 636, is 0.8% slower than the B93, while the Intel Core m3-6Y30, scoring 637, is 0.9% slower. All four rivals fall within a margin that is imperceptible in real-world use. The B93's percentile rank of 15 confirms that it sits in the bottom 15% of all CPUs, but within that low tier it is effectively interchangeable with its closest competitors.

FAQ

Q: Does the Phenom II X4 B93 have integrated graphics?

A: The CPU itself does not include a graphics core. Display output is only available on certain motherboards as a chipset feature.

Q: What memory types does the B93 support?

A: It supports both DDR2 and DDR3 memory in a dual-channel configuration, with a total bandwidth of 21.3 GB/s.

Q: What is the TDP of this processor?

A: The TDP is rated at 95W.

Q: Is the multiplier unlocked for overclocking?

A: No, the multiplier is locked, so overclocking via multiplier adjustment is not possible.

Q: When was the B93 released?

A: It was released on September 30, 2009.

Q: What is the manufacturing process?

A: The processor is built on a 45nm process node.

Benchmark Performance

The B93's benchmark scores paint a clear picture of its capabilities. In Cinebench R15, the multicore score is 184; in R20, it improves to 770; and in R23, it reaches 1835. Single-core scores are 108 in R20 and 259 in R23. These numbers indicate that while the processor can scale across its four cores, the per-core performance is extremely limited. The average benchmark score of 631, combined with a 15th percentile ranking, places the B93 among the weakest processors in the database.

Comparing to its nearest rivals, the B93 is virtually tied with all four. The Athlon II X4 630 averages 635, just 0.7% higher, while the Xeon L5420 averages 626, 0.7% lower. The Core i7-3517U averages 636 (0.8% higher) and the Core m3-6Y30 averages 637 (0.9% higher). These deltas are well within the noise of typical benchmarking, so the B93 offers no meaningful advantage or disadvantage against any of these parts. The practical takeaway is that the B93 is a competent, if unremarkable, quad-core processor from its generation—adequate for basic multi-threaded tasks but far too slow for any modern, performance-sensitive workload.