Intel Core i3-8100T

The Intel Core i3-8100T is a 14 nm Coffee Lake desktop processor with four physical cores and four threads, a base clock of 3.10 GHz, and no boost capability. Released in April 2018 with a launch MSRP of $117, it is now end-of-life. Its benchmark scores place it at the 39th percentile of all CPUs tracked, with an average benchmark score of 1501. The data shows a processor firmly anchored in the entry-level segment, trading blows with older quad-core designs rather than challenging modern mid-range parts.

Benchmark Performance

The average benchmark score of 1501 puts the i3-8100T in a tight cluster of rivals, all within roughly one percent of each other. Against the Intel Core i7-3770S, the i3-8100T leads by a marginal 0.1%, a statistical tie that indicates the older Ivy Bridge part retains parity in aggregate workloads. The gap to the AMD Opteron 6344 is similarly narrow at 0.6% in the i3’s favor, while the lead over the Intel Core i5-6600 is 0.9%.

The most direct comparison is with the Intel Pentium Gold G7400E, which posts an average score of 1508. Here the i3-8100T trails by 0.4%, meaning the modern dual-core Pentium with hyper-threading edges out the quad-core i3 in the aggregate metric. This is a notable result: the i3’s two extra physical cores do not overcome the Pentium’s architectural advantages and higher clock behavior in the averaged benchmark set.

Delving into specific workloads, the Cinebench R23 multi-core score of 4476 shows the processor’s sustained throughput capability. In single-core R23, the score is 631. The ratio between these — roughly seven to one — is typical for a locked quad-core without turbo, but the absolute single-core figure places it well behind contemporary parts. The Geekbench results corroborate this split: 3142 multi-core and 1104 single-core. The multi-core score is respectable for the class, but the single-core score of 1104 reveals the limitation of the fixed 3.10 GHz clock.

The Cinebench R20 numbers — 1879 multi-core and 265 single-core — continue the pattern. The multi-core result is within a few percent of the older i7-3770S, which is an achievement given the i3’s 35 W TDP target. The single-core R20 score of 265 is modest, reflecting the absence of any boost headroom. In Cinebench R15, the multi-core score of 450 and single-core score of 63 further illustrate the processor’s profile: capable of scaling with all four cores engaged, but limited when frequency is the binding constraint.

Platform and Compatibility

The i3-8100T uses Intel Socket 1151, placing it in the Coffee Lake generation. It is built on the 14 nm process with a die size of 126 mm². The memory controller supports DDR4 in a dual-channel configuration, offering a memory bandwidth of 38.4 GB/s. ECC memory is supported, a feature that distinguishes this processor from many consumer-focused parts and makes it relevant for basic error-checking workloads.

PCIe support is Gen 3 with 16 lanes available from the CPU only. This is the standard allocation for a desktop processor of this era, providing sufficient bandwidth for a single discrete graphics card or a pair of lower-bandwidth devices. The integrated graphics are UHD Graphics 630, which provides display output capability without a discrete GPU, though its performance is suitable for basic tasks rather than intensive 3D rendering.

The upgrade path on Socket 1151 is a key consideration. The i3-8100T sits at the bottom of the Coffee Lake desktop stack, and the same socket supports higher-core-count parts from the same generation. Users who find the four-thread limit constraining could move to a six-core Coffee Lake processor without changing the motherboard, provided the board’s power delivery and BIOS support it. However, the end-of-life production status means no future processors will arrive for this platform, and the socket is not forward-compatible with later Intel generations.

The memory support is limited to DDR4, with no mention of DDR3 compatibility. The dual-channel bus at 38.4 GB/s is adequate for the processor’s four cores, as the memory bandwidth is unlikely to be a bottleneck in most workloads. The presence of ECC support is anomalous for a Core i3 SKU and suggests a niche role in low-cost, error-tolerant systems rather than mainstream consumer builds.

Single-Thread vs Multi-Thread Behavior

The benchmark data reveals a processor that is disproportionately stronger in multi-threaded workloads relative to its single-thread performance. The Cinebench R23 single-core score of 631 is low by modern standards, while the multi-core score of 4476 is respectable for a four-thread part. This divergence is directly attributable to the fixed 3.10 GHz clock with no boost. Most contemporary processors raise their clock speed when a single core is active, but the i3-8100T cannot, so its single-thread performance is capped at the base frequency.

In contrast, the multi-thread performance benefits from the four physical cores running at the same frequency simultaneously. The scaling from single-core to multi-core in Cinebench R23 is approximately 7.1x, which is excellent linear scaling for a four-core, four-thread processor. This indicates that the thermal and power constraints do not throttle the processor when all cores are loaded, a testament to the 35 W TDP design.

The Geekbench results show a similar pattern, with a multi-core to single-core ratio of about 2.85x. This is lower than the Cinebench scaling because Geekbench’s workload mix includes memory and other subsystem tests that do not scale perfectly with core count. Still, the ratio confirms that the processor is more effective at spreading work across cores than at maximizing a single thread’s performance.

Real-world implications are clear: applications that are heavily threaded — such as video encoding, 3D rendering, or batch photo processing — will engage all four cores and achieve performance close to what the multi-core scores suggest. Applications that rely on a single thread, such as many legacy games or lightly threaded productivity tools, will be held back by the 631 single-core R23 score. The i3-8100T is thus a processor for throughput-oriented tasks at low power, not for latency-sensitive single-thread work.

Who Should Consider It

Workload-based recommendations follow directly from the benchmark profile. For gaming, the i3-8100T is a poor fit. Modern games increasingly rely on single-thread performance and high clock speeds, and the processor’s fixed 3.10 GHz clock and 631 R23 single-core score will bottleneck even mid-range discrete GPUs. The four threads are also a limitation, as many current titles expect six or more threads. The integrated UHD Graphics 630 is not a gaming solution, so a discrete GPU is mandatory, but the CPU would undermine its potential.

For content creation, the picture is mixed. Multi-threaded rendering tasks, such as Cinebench R23’s workload, will use all four cores effectively, and the 4476 score is competitive with older quad-core i7 parts. A user doing occasional video encoding or 3D rendering on a tight power budget could find the i3-8100T adequate. However, interactive tasks within creation software — scrubbing timelines, applying filters, previewing effects — often depend on single-thread performance, where the processor falls short. The 0.1% delta over the i7-3770S in average score suggests that users migrating from a decade-old system would see little improvement in single-thread responsiveness.

For office and general productivity, the i3-8100T is serviceable but unremarkable. The Geekbench single-core score of 1104 is sufficient for web browsing, document editing, and spreadsheet work, but the 39th percentile ranking means most other desktop CPUs are faster. The ECC memory support is the differentiator here, making it a candidate for a low-cost file server or a workstation where data integrity matters more than raw speed. The 0.4% deficit to the Pentium Gold G7400E in average score is telling: a modern dual-core with hyper-threading matches or beats this quad-core in the aggregate, so users who prioritize single-thread speed over core count could choose the Pentium instead.

Power and Thermals

The 35 W TDP is the defining characteristic of the i3-8100T. This is a low-power SKU, designed for systems where heat dissipation and energy consumption are primary constraints. The 14 nm process and conservative 3.10 GHz clock allow the processor to operate within this thermal envelope without a boost feature, which is why the multi-core Cinebench R23 scaling is nearly linear — there is no thermal headroom issue to trigger throttling.

The cooling implications are modest. A stock Intel cooler or a low-profile third-party cooler is sufficient for this TDP class, as the processor does not generate the heat of a 65 W or 95 W part. The die size of 126 mm² is relatively large for a quad-core, which helps spread heat across the integrated heat spreader. Systems with constrained airflow, such as small-form-factor cases or fanless designs, can accommodate this processor more easily than higher-TDP alternatives.

The 0.1% delta over the Intel Core i7-3770S is notable because the i7-3770S is also a low-power variant (its 65 W TDP, though not listed in the rival data, is implied by its position in the same market segment). The i3-8100T achieves comparable average performance at roughly half the power draw, a direct benefit of the newer 14 nm process against the older 22 nm Ivy Bridge. The Pentium Gold G7400E, which edges out the i3 by 0.4%, is also a low-power part, but the i3’s four cores provide more consistent multi-threaded throughput.

For users building a system where the cooling solution is minimal — a passively cooled case, a thin client, or an embedded-style board — the 35 W TDP makes the i3-8100T a viable option. The trade-off is the lack of boost clock, which means the processor cannot dynamically increase performance when thermal headroom exists. The data shows that this trade-off is acceptable for multi-threaded workloads but detrimental to single-threaded ones, a balance that buyers must weigh against their specific application mix.