AMD Ryzen 7 5800XT vs Intel Core Ultra 5 135H Comparison

Head-to-Head Benchmarks

The head-to-head data presents a strikingly one-sided picture. The AMD Ryzen 7 5800XT wins 15 of the 17 recorded comparisons, with the Intel Core Ultra 5 135H managing only two victories. The most dramatic margin appears in Cinebench R23 multi-core, where the AMD part scores 23,794 against Intel's 11,875.5, a delta of 100.4%. This is not a marginal lead; it is a complete doubling of performance in that specific render test. The single-core R23 result mirrors this trend, with AMD at 3,359 versus Intel's 1,700, a 97.6% advantage.

The pattern holds across older Cinebench versions. In R20 multi-core, the 5800XT posts 9,993 against 7,834, a 27.6% lead. The R20 single-core test shows the same 27.6% delta, with scores of 1,410 and 1,105 respectively. Even in R15, the margins are substantial: 2,398 versus 1,718 in multi-core (39.6%) and 338 versus 244 in single-core (38.5%). These consistent deltas across three generations of Cinebench suggest the AMD chip's architectural efficiency translates directly into render workloads.

PassMark results tell a similar story, though with some nuance. The AMD processor leads in data compression by 39.9% (352,002 versus 251,651) and in data encryption by 42.8% (21,461 versus 15,026). Extended instructions show a 61.5% gap (24,270 versus 15,028), and integer math favors AMD by 27.8% (93,942 versus 73,509). The multithread score gives AMD a 25.1% edge (28,053 versus 22,422). Even random string sorting, which often rewards memory subsystem efficiency, goes to AMD by 23.9% (35,911 versus 28,980).

The Intel part's two wins are worth examining closely. In floating-point math, Intel scores 54,867 against AMD's 53,808, a slim 1.9% margin. This is the only head-to-head where the Core Ultra 5 135H outperforms by more than a rounding error. The other Intel win is in PassMark physics, where it posts 1,482 against AMD's 1,355, an 8.6% advantage. These wins suggest specific workload characteristics, likely related to the Intel part's different core topology and power delivery, but they do not offset the overwhelming AMD dominance elsewhere.

Single-threaded PassMark scores are nearly identical: 3,535 for AMD versus 3,521 for Intel, a 0.4% delta. This near-tie in a general single-thread test contrasts sharply with the massive single-core Cinebench deltas, indicating that the two processors have very different strengths in single-threaded scenarios depending on the workload type. The data overall points to AMD as the clear performance leader in the vast majority of measured tasks.

Architecture Differences

The two processors come from fundamentally different design philosophies. The AMD Ryzen 7 5800XT is built on Zen 3 architecture, codenamed Vermeer, using TSMC's 7 nm process with 4,150 million transistors on a 74 mm² die. It features 8 cores and 16 threads, a base clock of 3.80 GHz, and a boost clock of 4.80 GHz. The cache hierarchy is straightforward: 64 KB L1 per core, 512 KB L2 per core, and 32 MB shared L3. This is a desktop part on the AMD Socket AM4 platform.

The Intel Core Ultra 5 135H uses Meteor Lake architecture, also on a 7 nm process but fabricated by Intel itself. It packs 14 cores and 18 threads, with a base clock of 3.60 GHz and boost clock of 4.60 GHz. The cache layout differs substantially: 112 KB L1 per core, 2 MB L2 per core, and 18 MB shared L3. This is a mobile processor on the Intel BGA 2049 socket. The core count advantage for Intel (14 versus 8) does not translate into benchmark wins, which suggests the Zen 3 cores are individually far more capable than the Meteor Lake cores in most tests.

Memory support highlights another major divergence. The AMD part supports DDR4 with dual-channel configuration and a memory bandwidth of 51.2 GB/s. The Intel part supports DDR5 with dual-channel configuration and a memory bandwidth of 89.6 GB/s. Despite the higher bandwidth figure for Intel, AMD wins the memory-sensitive tests like data compression and random string sorting. The Intel part also lacks ECC memory support, while AMD includes it. PCIe connectivity differs as well: AMD offers Gen 4 with 20 lanes, while Intel offers Gen 5 with 8 lanes.

Integrated graphics represent a clear differentiator. The Intel Core Ultra 5 135H includes Arc Xe-LPG 96EU graphics, while the AMD Ryzen 7 5800XT has no integrated graphics at all. This means the Intel part can drive displays without a discrete GPU, a typical requirement for mobile platforms. The AMD desktop part requires a separate graphics card. The Intel part also has a locked multiplier, while AMD's is unlocked, enabling overclocking on the AM4 platform.

Where Each One Wins

The benchmark splits reveal distinct use-case profiles. The AMD Ryzen 7 5800XT wins in rendering, compression, encryption, integer math, and multithreaded workloads. Its Cinebench R23 multi-core score of 23,794 versus 11,875.5 indicates it is the clear choice for 3D rendering, video encoding, and other heavily parallel content creation tasks. The 100.4% delta in that test alone makes the recommendation straightforward for render farms or workstation builds. Data compression and encryption wins further cement its suitability for database workloads, file archiving, and security-sensitive applications.

The AMD processor also wins in single-core Cinebench tests by massive margins. The R23 single-core score of 3,359 versus 1,700 (97.6% delta) suggests that even lightly threaded workloads, such as legacy applications or certain simulation tools, will run significantly faster on the AMD part. The integer math advantage (93,942 versus 73,509) points to strength in general-purpose computing, including office productivity, code compilation, and scientific computing that relies on integer operations.

The Intel Core Ultra 5 135H wins in floating-point math (54,867 versus 53,808) and physics simulations (1,482 versus 1,355). These are comparatively narrow margins, but they indicate specific niches. Floating-point-heavy workloads such as scientific simulations, financial modeling, and certain engineering tools may see a slight edge on the Intel part. The physics score suggests that games or physics-based applications might perform marginally better on Intel, though the difference is small.

The Intel part also carries the integrated Arc Xe-LPG 96EU graphics, which is a decisive factor for systems without a discrete GPU. For a compact laptop or a thin-and-light mobile workstation, the ability to output to displays without additional hardware is essential. The AMD part, lacking integrated graphics, cannot function without a separate GPU. This makes the Intel processor the only viable choice for fanless or low-power mobile designs where a discrete GPU is not an option.

Specification Differences

The two processors differ across nearly every specification category. The AMD Ryzen 7 5800XT has 8 cores and 16 threads, while the Intel Core Ultra 5 135H has 14 cores and 18 threads. The AMD part clocks higher: 3.80 GHz base and 4.80 GHz boost, versus 3.60 GHz base and 4.60 GHz boost for Intel. Power consumption differs dramatically: the AMD part has a TDP of 105 watts, while the Intel part is rated at 28 watts. This makes the Intel chip far more suitable for battery-powered mobile devices.

Cache configurations are distinct. AMD uses 64 KB L1 per core, 512 KB L2 per core, and 32 MB shared L3. Intel uses 112 KB L1 per core, 2 MB L2 per core, and 18 MB shared L3. While Intel has more L1 and L2 per core, AMD has nearly double the L3. Memory support also diverges: AMD uses DDR4 with 51.2 GB/s bandwidth, while Intel uses DDR5 with 89.6 GB/s bandwidth. AMD supports ECC memory; Intel does not. PCIe generation and lane counts differ: AMD offers Gen 4 with 20 lanes, Intel offers Gen 5 with 8 lanes.

The integrated graphics situation is binary: AMD has none, Intel has Arc Xe-LPG 96EU. The AMD part is a desktop processor with an unlocked multiplier, the Intel part is mobile with a locked multiplier. The AMD launch MSRP is $249, while the Intel launch MSRP is $342. Release dates differ: AMD launched on 2024-07-30, Intel on 2023-12-13. The AMD process node is 7 nm from TSMC, while Intel's 7 nm is from its own foundry. The AMD transistor count is 4,150 million on a 74 mm² die, while Intel's transistor count and die size are not recorded in the database.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 5 135H has 14 cores and 18 threads, while the AMD Ryzen 7 5800XT has 8 cores and 16 threads.

Q: How does the AMD processor compare in multi-core rendering performance?

A: In Cinebench R23 multi-core, the AMD Ryzen 7 5800XT scores 23,794, which is 100.4% higher than the Intel Core Ultra 5 135H's score of 11,875.5.

Q: Does the Intel processor have integrated graphics?

A: Yes, the Intel Core Ultra 5 135H includes Arc Xe-LPG 96EU integrated graphics, while the AMD Ryzen 7 5800XT has no integrated graphics.

Q: Which processor has higher memory bandwidth?

A: The Intel Core Ultra 5 135H has a memory bandwidth of 89.6 GB/s with DDR5 support, while the AMD Ryzen 7 5800XT has 51.2 GB/s with DDR4 support.

Q: What is the TDP difference between the two?

A: The AMD Ryzen 7 5800XT has a TDP of 105 watts, while the Intel Core Ultra 5 135H has a TDP of 28 watts.

Q: Which processor wins in the PassMark physics test?

A: The Intel Core Ultra 5 135H wins the PassMark physics test with a score of 1,482, compared to the AMD Ryzen 7 5800XT's 1,355, an 8.6% advantage.

The Verdict

The data points to a clear performance hierarchy. The AMD Ryzen 7 5800XT is the dominant processor in nearly every benchmark category, winning 15 of 17 head-to-head comparisons. Its largest victories come in multi-threaded rendering (100.4% in Cinebench R23 multi-core) and single-core rendering (97.6% in Cinebench R23 single-core), which make it the obvious choice for content creation, scientific computing, and any workload that stresses raw CPU throughput. The AMD part also benefits from an unlocked multiplier and a lower launch MSRP of $249, making it a compelling option for desktop builds where power consumption is not a primary constraint.

The Intel Core Ultra 5 135H has a narrower but still relevant role. Its 28-watt TDP makes it suitable for mobile platforms where battery life and thermal limits are critical. The integrated Arc Xe-LPG 96EU graphics eliminate the need for a discrete GPU, which is essential for compact laptops. Its wins in floating-point math and physics, though modest, suggest specific niches in scientific and physics-based applications. The higher memory bandwidth (89.6 GB/s versus 51.2 GB/s) may benefit certain memory-intensive workloads, even though the benchmark data does not consistently reflect this advantage.

For a desktop workstation or a performance-focused build where power draw is acceptable, the AMD Ryzen 7 5800XT is the clear choice based on the recorded measurements. For a mobile laptop or a system requiring integrated graphics and minimal power consumption, the Intel Core Ultra 5 135H is the only sensible option. The data does not suggest any scenario where the Intel part outperforms the AMD part in general computing tasks, but its mobile-specific features and lower TDP define its purpose. The verdict hinges on platform and use case: raw performance favors AMD, mobility and integration favor Intel.