AMD Instinct MI300A vs NVIDIA L20 Comparison

Head-to-Head Benchmarks

The database currently holds no direct head-to-head benchmark entries for the AMD Instinct MI300A versus the NVIDIA L20. The MI300A has no recorded benchmark scores, an average benchmark score of zero, and sits at the 50th percentile of all GPUs in the database. The L20, by contrast, has two recorded benchmark results and an average score of 251,147, placing it at the 99th percentile. This means the MI300A cannot be compared to the L20 through any shared synthetic workload in the current records.

The L20 delivers 274,276 points in Geekbench OpenCL and 228,018 points in Geekbench Vulkan. The OpenCL result is 46,258 points higher than the Vulkan result, a gap of roughly 20.3 percent within the same card. The average of these two results, 251,147, is what the database uses for percentile ranking and rival comparisons. The MI300A offers no comparable numbers, so any attempt to quantify a performance delta between the two parts is impossible from recorded data.

The L20's nearest rivals in the database provide context for its standing. The NVIDIA PG506-232 averages 225,124 points, which puts the L20 11.6 percent ahead of that card. The AMD Radeon PRO W7900D averages 219,827 points, and the L20 leads it by 14.2 percent. On the other side, the NVIDIA L40 averages 284,111 points, meaning the L40 leads the L20 by 11.6 percent. The NVIDIA RTX 6000 Ada Generation averages 287,237 points, which is 12.6 percent ahead of the L20. These four rivals bracket the L20's position: it sits clearly above two of them and clearly below two others.

The MI300A has no nearest rival entries at all, which further limits the analysis. Without benchmark scores, there is no way to determine whether the MI300A would outperform the L20 in compute workloads, graphics tasks, or any other measured category. The database records zero wins for the MI300A and zero wins for the L20 in direct comparisons, which is consistent with the absence of head-to-head entries.

The disparity in data availability is itself a notable finding. The L20 has sufficient measurements to rank it in the 99th percentile, a position shared by only the top tier of recorded GPUs. The MI300A sits at the 50th percentile, but that figure is a default placement for parts without any benchmark data, not a reflection of measured performance. The percentile alone should not be read as evidence that the MI300A is an average performer; it simply reflects the lack of recorded results.

In practical terms, the only quantitative performance statements that can be made in this comparison come from the L20's own scores and its rival deltas. The L20 is 11.6 percent faster than the PG506-232, 14.2 percent faster than the Radeon PRO W7900D, 11.6 percent slower than the L40, and 12.6 percent slower than the RTX 6000 Ada Generation. The MI300A contributes no comparable figures, so no win margin can be assigned to either card.

The Verdict

From the recorded data, the NVIDIA L20 is the only one of the two with measurable performance. It has two benchmark scores, an average score of 251,147, and a 99th percentile ranking. The AMD Instinct MI300A has no recorded benchmarks, an average score of zero, and a 50th percentile placement that is not based on any measurement. Any user selecting between these two parts on the basis of the database would have to favor the L20 purely because it has verifiable results, while the MI300A offers none.

The L20's position among its nearest rivals strengthens its case. It sits 11.6 percent above the PG506-232 and 14.2 percent above the Radeon PRO W7900D. It does trail the L40 by 11.6 percent and the RTX 6000 Ada Generation by 12.6 percent, but those are higher-tier cards with larger memory and different positioning. The L20's 99th percentile ranking indicates that it belongs to the upper echelon of all recorded GPUs, even if it is not the top performer in its immediate cluster.

The MI300A cannot be recommended on the basis of benchmark data because no such data exists in the database. It is a large accelerator with substantial specifications, but the absence of scores means the database cannot confirm any level of performance. The verdict from the data is straightforward: the L20 is the only part with evidence of capability, and the MI300A remains unmeasured.

Architecture Differences

The two accelerators come from different design lineages. The AMD Instinct MI300A uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, built on a 5 nm process at TSMC. The NVIDIA L20 uses the Ada Lovelace architecture on the AD102 chip, also built on a 5 nm process at TSMC. Both use the same node and the same foundry, but the underlying designs diverge sharply.

The MI300A packs 153,000 million transistors onto a 1017 mm² die, yielding a transistor density of 150.4 million transistors per square millimeter. The L20 contains 76,300 million transistors on a 609 mm² die, with a density of 125.3 million per square millimeter. The MI300A has more than double the transistor count of the L20 and a die that is roughly 67 percent larger by area. The density difference shows that AMD packs transistors more tightly on the MI300A, while NVIDIA uses a more relaxed layout on the smaller AD102 chip.

Memory architecture differs completely. The MI300A uses 128 GB of HBM3 across an 8192-bit bus, producing 5.32 TB/s of bandwidth. The L20 uses 48 GB of GDDR6 across a 384-bit bus, delivering 864.0 GB/s. The MI300A has roughly 2.67 times the memory capacity and more than six times the memory bandwidth of the L20. The L20's memory clock runs at 2250 MHz with 18 Gbps effective, while the MI300A's memory runs at 1300 MHz with 5.2 Gbps effective, but the MI300A's vastly wider bus compensates for the lower clock speed.

The compute pipelines also differ. The MI300A has 14,592 shading units and 912 texture mapping units, but no ROPs, no RT cores, and no tensor cores listed. Its pixel rate is recorded as 0 MPixel/s, which makes sense for a compute-focused accelerator with no display outputs. The L20 has 11,776 shading units, 368 TMUs, and 128 ROPs, along with 92 RT cores and 368 tensor cores. The L20 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI300A lists N/A for all three APIs.

The L20 is a dual-slot card with a 267 mm length, 111 mm height, one 16-pin power connector, and four DisplayPort 1.4a outputs. The MI300A is an OAM module with no display outputs and no power connectors listed. The L20 uses a PCIe 4.0 x16 interface, while the MI300A uses PCIe 5.0 x16. The MI300A has no recorded production status, while the L20 is listed as Active.

FAQ

Q: Does the AMD Instinct MI300A have any benchmark scores in the database?

A: No. The MI300A has an empty benchmarks array, an average benchmark score of 0, and no nearest rival entries. It has zero recorded wins in comparisons.

Q: What benchmark scores does the NVIDIA L20 have?

A: The L20 scores 274,276 in Geekbench OpenCL and 228,018 in Geekbench Vulkan. Its average benchmark score is 251,147.

Q: How does the L20 compare to its nearest rivals?

A: The L20 is 11.6 percent faster than the NVIDIA PG506-232 and 14.2 percent faster than the AMD Radeon PRO W7900D. It is 11.6 percent slower than the NVIDIA L40 and 12.6 percent slower than the NVIDIA RTX 6000 Ada Generation.

Q: Which card has more memory?

A: The MI300A has 128 GB of HBM3, while the L20 has 48 GB of GDDR6. The MI300A also has a wider 8192-bit bus and 5.32 TB/s bandwidth, compared to the L20's 384-bit bus and 864.0 GB/s.

Q: Which card has a higher transistor count?

A: The MI300A has 153,000 million transistors on a 1017 mm² die. The L20 has 76,300 million transistors on a 609 mm² die. Both are built on a 5 nm process at TSMC.

Q: Does the L20 support graphics APIs?

A: Yes. The L20 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300A lists N/A for all three APIs.

Where Each One Wins

The NVIDIA L20 wins in every category where recorded data exists. It has benchmark scores, a 99th percentile ranking, and an average score of 251,147. It beats two of its nearest rivals by double-digit margins: 11.6 percent over the PG506-232 and 14.2 percent over the Radeon PRO W7900D. It also supports a full graphics feature set with DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, plus display outputs through four DisplayPort 1.4a connectors. The L20's 92 RT cores and 368 tensor cores give it hardware support for ray tracing and tensor workloads, neither of which are listed for the MI300A.

The AMD Instinct MI300A wins in specification categories that do not depend on benchmark scores. It offers 128 GB of HBM3 memory, which is 80 GB more than the L20's 48 GB of GDDR6. Its 5.32 TB/s memory bandwidth is more than six times the L20's 864.0 GB/s. The MI300A also has a larger die at 1017 mm² versus 609 mm², more transistors at 153,000 million versus 76,300 million, more shading units at 14,592 versus 11,776, and more TMUs at 912 versus 368. It uses PCIe 5.0 x16, while the L20 uses PCIe 4.0 x16. These are architectural advantages, but without benchmark results the database cannot show how they translate into actual performance.

The L20 also wins on power efficiency in the recorded specifications. Its TDP is 275 W, while the MI300A is rated at 750 W. The L20's suggested PSU is 600 W, while the MI300A requires a suggested PSU of 1150 W. The L20 is a dual-slot card with a 267 mm length, while the MI300A is an OAM module with no listed dimensions. For deployments where power draw and physical form factor matter, the L20 has clear specification-level advantages.

Specification Differences

The two accelerators differ across nearly every specification field. The MI300A uses the CDNA 3.0 architecture, while the L20 uses Ada Lovelace. The MI300A's chip is Aqua Vanjaram, the L20's is AD102. Both use a 5 nm TSMC process.

Transistor counts and die sizes diverge substantially. The MI300A has 153,000 million transistors on a 1017 mm² die with a density of 150.4 million per square millimeter. The L20 has 76,300 million transistors on a 609 mm² die with a density of 125.3 million per square millimeter.

Clock speeds differ. The MI300A runs at a 1000 MHz base and 2100 MHz boost. The L20 runs at a 1440 MHz base and 2520 MHz boost. The L20 has a higher base clock by 440 MHz and a higher boost clock by 420 MHz.

Memory specifications are the largest point of separation. The MI300A has 128 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth and a memory clock of 1300 MHz (5.2 Gbps effective). The L20 has 48 GB of GDDR6 on a 384-bit bus with 864.0 GB/s bandwidth and a memory clock of 2250 MHz (18 Gbps effective).

Compute unit counts differ. The MI300A has 14,592 shading units, 912 TMUs, 0 ROPs, no RT cores, and no tensor cores. The L20 has 11,776 shading units, 368 TMUs, 128 ROPs, 92 RT cores, and 368 tensor cores. The MI300A's pixel rate is 0 MPixel/s, while the L20's is 322.6 GPixel/s. Texture rates are 1,915.2 GTexel/s for the MI300A and 927.4 GTexel/s for the L20. FP32 compute is 61.29 TFLOPS for the MI300A and 59.35 TFLOPS for the L20. The L20 also records FP16 at 59.35 TFLOPS (1:1), while the MI300A has no FP16 entry.

Power and physical specifications differ. The MI300A has a 750 W TDP, no power connectors, a suggested PSU of 1150 W, and an OAM Module slot. The L20 has a 275 W TDP, one 16-pin power connector, a suggested PSU of 600 W, and a Dual-slot form factor. The L20 measures 267 mm in length and 111 mm in height; the MI300A has no recorded dimensions.

Bus interfaces differ by generation. The MI300A uses PCIe 5.0 x16, while the L20 uses PCIe 4.0 x16. Display outputs are absent on the MI300A, while the L20 provides four DisplayPort 1.4a outputs. API support is N/A for the MI300A, while the L20 lists DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Release dates are close. The MI300A was released on December 5, 2023. The L20 was released on November 15, 2023, roughly three weeks earlier. The L20's production status is Active; the MI300A's status is not recorded. The MI300A's predecessor is Radeon Instinct, and the L20's predecessor is Server Ampere with Server Hopper listed as its successor.