NVIDIA GB10 vs NVIDIA L4 Comparison

# The Verdict

The data presents a clear split between two very different server-oriented NVIDIA accelerators. The NVIDIA L4, built on Ada Lovelace, wins both available head-to-head benchmarks decisively. In Geekbench OpenCL, the L4 scores 140,838 against the GB10's 120,137, a 17.2% advantage. In Geekbench Vulkan, the L4 leads with 121,306 versus 114,648, a 5.8% margin. Those are the only two benchmark comparisons available, and the L4 takes both, giving it a 2-0 record in the head-to-head section.

However, the GB10 is not without its own compelling case. Its average benchmark score of 117,393 places it in the 95th percentile of all GPUs, identical to the L4's percentile ranking. The GB10's nearest rival, the NVIDIA RTX 4000 SFF Ada Generation, scores 117,088, putting the GB10 a marginal 0.3% ahead. The GB10 also carries a launch MSRP of 3,999 USD, which can be stated once as its official launch price.

Who should pick which? Strictly from the data, the L4 is the choice for raw compute performance in both OpenCL and Vulkan workloads. Its 140,838 OpenCL score puts it in the company of the RTX 3090 Ti (131,938, a -0.7% delta) and the RTX 4000 Ada Generation (135,218, a -3.1% delta), meaning the L4 outperforms those rivals by those margins. The GB10, meanwhile, is a far more interesting proposition for memory-bound tasks. Its 128 GB of LPDDR5X memory dwarfs the L4's 24 GB GDDR6, and while its bandwidth is lower at 273.2 GB/s versus 300.1 GB/s, the sheer capacity advantage is enormous. For anyone needing to hold very large datasets close to the compute, the GB10's memory profile is unmatched in this comparison.

The GB10 also offers a newer architecture—Blackwell 2.0 versus Ada Lovelace—and a PCIe 5.0 x16 bus interface compared to the L4's PCIe 4.0 x16. The GB10 is also an IGP (integrated graphics processor) form factor with a compact 150 mm by 150 mm footprint. The L4 is a single-slot, 169 mm long card. The L4 draws just 72 W TDP, while the GB10 consumes 140 W. The L4's suggested PSU is 250 W; the GB10's is 300 W.

FAQ

Q: Which GPU wins in raw compute benchmarks?

A: The NVIDIA L4 wins both head-to-head benchmark tests. In Geekbench OpenCL, the L4 scores 140,838 versus 120,137 for the GB10, a 17.2% delta. In Geekbench Vulkan, the L4 scores 121,306 versus 114,648, a 5.8% delta.

Q: Does the GB10 have any performance advantage at all?

A: In the available benchmark suite, no—the GB10 wins zero head-to-head tests. However, its average benchmark score of 117,393 places it in the 95th percentile, matching the L4's percentile. The GB10's nearest rival, the RTX 4000 SFF Ada Generation, scores 117,088, so the GB10 sits 0.3% above that card.

Q: How do these cards compare to their nearest competitors?

A: The L4's average score of 131,072 is 0.7% ahead of the RTX 3090 Ti (131,938), 3.1% ahead of both the RTX 4000 Ada Generation (135,218) and the A10M (135,230), and 3.2% ahead of the Radeon PRO W6800 (135,396). The GB10's average of 117,393 is 0.3% ahead of the RTX 4000 SFF Ada Generation (117,088), 1.3% ahead of the Radeon PRO W7700 (118,976), 2.6% behind the Tesla V100 SXM2 16 GB (114,395) is actually reversed—the GB10 is 2.6% ahead of that card, and 3% ahead of the RTX A5500 Mobile (113,944).

Q: What is the memory capacity difference?

A: The GB10 features 128 GB of LPDDR5X memory on a 256-bit bus, yielding 273.2 GB/s bandwidth. The L4 has 24 GB of GDDR6 on a 192-bit bus with 300.1 GB/s bandwidth. The GB10 has over five times the memory capacity but slightly lower bandwidth.

Q: Which card has newer architectural features?

A: The GB10 uses the Blackwell 2.0 architecture with the GB20B chip, while the L4 uses Ada Lovelace with the AD104 chip. The GB10 also supports PCIe 5.0 x16, whereas the L4 uses PCIe 4.0 x16. The GB10 has a display output (1x HDMI), while the L4 has no display outputs.

Q: What are the power requirements?

A: The L4 has a 72 W TDP with a 250 W suggested PSU. The GB10 has a 140 W TDP with a 300 W suggested PSU. Neither card requires external power connectors.

Architecture Differences

The architectural gap between these two is generational. The L4 is built on Ada Lovelace, NVIDIA's server-grade architecture from the "Server Ada (Lxx)" generation, using the AD104 chip. The GB10 uses Blackwell 2.0, from the "Server Blackwell (Bxx)" generation, with the GB20B chip. Both are fabricated on a 5 nm process at TSMC, but the similarities end there.

The L4 packs 35,800 million transistors on a 294 mm² die, giving a transistor density of 121.8 million per square millimeter. The GB10's transistor count is listed as unknown, but its die size is larger at 382 mm². The GB10 has no listed transistor density. The L4 has 7,424 shading units, 240 texture mapping units, and 80 ROPs. The GB10 has fewer shading units at 6,144, but more TMUs at 384, and fewer ROPs at 48. The L4 has 60 RT cores and 240 tensor cores; the GB10 has 48 RT cores and 384 tensor cores.

The GB10's Blackwell architecture also brings a different API profile. The L4 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The GB10 lists N/A for DirectX, OpenGL, and Vulkan—a notable omission for a chip that otherwise posts Vulkan benchmark scores. The GB10's physical form factor is also distinct: it is an IGP (integrated graphics processor) rather than a discrete card, with dimensions of 150 mm by 150 mm and a height of 51 mm. The L4 is a single-slot card measuring 169 mm long and 56 mm high.

Specification Differences

The specification sheet shows a clear divergence in design philosophy. The L4 uses GDDR6 memory totaling 24 GB, with a 192-bit bus and 300.1 GB/s bandwidth. The GB10 uses LPDDR5X memory totaling 128 GB, with a 256-bit bus and 273.2 GB/s bandwidth. The L4's base clock is 795 MHz with a boost of 2040 MHz; the GB10 runs higher at 1665 MHz base and 2418 MHz boost. Memory clocks also differ: the L4 runs at 1563 MHz (12.5 Gbps effective), while the GB10 runs at 1067 MHz (8.5 Gbps effective).

Pixel rates favor the L4 at 163.2 GPixel/s versus the GB10's 116.1 GPixel/s. Texture rates reverse the order: the GB10 achieves 928.5 GTexel/s, nearly double the L4's 489.6 GTexel/s. FP32 and FP16 compute are nearly identical, with the L4 at 30.29 TFLOPS and the GB10 at 29.71 TFLOPS, both at 1:1 ratio. The L4 draws 72 W TDP, the GB10 draws 140 W. The L4 has no display outputs; the GB10 has one HDMI port. The GB10 uses PCIe 5.0 x16, the L4 uses PCIe 4.0 x16. The GB10's launch MSRP is 3,999 USD.

Head-to-Head Benchmarks

The first head-to-head test, Geekbench OpenCL, shows the L4 winning decisively with a score of 140,838 against the GB10's 120,137. That is a 17.2% delta—a substantial margin that indicates the L4's compute architecture is significantly more efficient at OpenCL workloads. The second test, Geekbench Vulkan, is closer: the L4 scores 121,306 against the GB10's 114,648, a 5.8% delta. The L4 still wins, but the narrower gap suggests the GB10's Blackwell architecture is more competitive in Vulkan contexts.

The L4's OpenCL score of 140,838 is notable when placed against its nearest rivals. The RTX 3090 Ti averages 131,938, meaning the L4 is 0.7% ahead of that card. The RTX 4000 Ada Generation and the A10M both average around 135,218-135,230, putting the L4 3.1% ahead of each. The Radeon PRO W6800 averages 135,396, so the L4 leads by 3.2%. These are all sub-5% margins, but the L4 comes out on top against every one of its nearest rivals.

The GB10's average benchmark score of 117,393 puts it in a slightly lower tier. It is 0.3% ahead of the RTX 4000 SFF Ada Generation (117,088) and 1.3% ahead of the Radeon PRO W7700 (118,976). It is 2.6% ahead of the Tesla V100 SXM2 16 GB (114,395) and 3% ahead of the RTX A5500 Mobile (113,944). The GB10's percentile ranking is 95th, same as the L4, but its raw scores are consistently lower in the head-to-head.

Where Each One Wins

The L4 wins on every measurable benchmark in this comparison, but the story goes deeper than raw scores. The L4's 17.2% OpenCL advantage suggests it is the better choice for compute-heavy workloads that rely on OpenCL, such as certain scientific simulations or data processing pipelines. Its 5.8% Vulkan win indicates it also handles graphics-adjacent tasks better, though the margin is smaller. The L4 also has a higher pixel rate (163.2 GPixel/s) and a lower TDP (72 W), making it more power-efficient per pixel and per watt.

The GB10's advantages are structural rather than benchmark-based. Its 128 GB memory capacity is the standout feature—five times the L4's 24 GB. For workloads that require massive in-memory datasets, such as large language model inference or big-data analytics, the GB10's capacity is transformative. Its texture rate of 928.5 GTexel/s is also far higher, which could benefit texture-heavy rendering tasks. The GB10's newer Blackwell architecture, PCIe 5.0 interface, and display output add modern connectivity options. Its compact IGP form factor (150 mm square) makes it suitable for dense server configurations where space is at a premium.

The GB10's higher boost clock (2418 MHz versus 2040 MHz) and larger TMU count (384 versus 240) suggest it may excel in specific throughput scenarios, even if the aggregate benchmarks show otherwise. Meanwhile, the L4's higher ROP count (80 versus 48) and pixel rate point to better rasterization performance. The L4 also supports full modern graphics APIs, while the GB10 lists N/A for DirectX, OpenGL, and Vulkan—though it clearly runs Vulkan benchmarks.

In practical terms, the L4 is the pick for anyone prioritizing raw compute scores, lower power draw, and established API support. The GB10 is the pick for memory-capacity-driven workloads, modern connectivity, and space-constrained deployments. The data cannot declare a single winner; it can only show that these are two different tools optimized for different problems.