NVIDIA B200 SXM6 vs NVIDIA GeForce RTX 4070 Mobile Comparison

Where Each One Wins

The recorded data presents an unusual comparison. The NVIDIA B200 SXM6 is a server accelerator with no benchmark scores in the database, while the NVIDIA GeForce RTX 4070 Mobile has a full suite of nine recorded benchmarks. The B200 SXM6 therefore has zero recorded wins in any benchmark category. The RTX 4070 Mobile holds wins in all available benchmark tests, including Geekbench OpenCL with a score of 109197, Geekbench Vulkan with 108367, and the Passmark suite covering DirectX 9, 10, 11, 12, G2D, G3D, and GPU compute.

The B200 SXM6 sits at the 50th percentile among all GPUs in the database, with an average benchmark score of zero. The RTX 4070 Mobile ranks at the 73rd percentile with an average benchmark score of 27435. This percentile gap indicates that the mobile GPU is positioned higher in the overall performance distribution, despite the B200 SXM6 being a much larger and more powerful accelerator on paper.

Looking at the use-case split, the RTX 4070 Mobile is the only one of the two with any measured performance data. Its Passmark G3D score of 19587 and GPU compute score of 8399 indicate it handles both rasterization and compute workloads. The B200 SXM6, with no display outputs and no API support listed, is clearly not designed for graphics rendering or consumer workloads. The data shows the B200 SXM6 is a compute-focused accelerator, while the RTX 4070 Mobile is a general-purpose mobile GPU.

Architecture Differences

The two chips take fundamentally different approaches to GPU design. The B200 SXM6 uses the GB100 chip built on the Blackwell architecture, part of the Server Blackwell (Bxx) generation. The RTX 4070 Mobile uses the AD106 chip on the Ada Lovelace architecture, from the GeForce 40 Mobile generation. Both are manufactured by TSMC on a 5 nm process node, but the similarity ends there.

The B200 SXM6 contains 208,000 million transistors on a die size of 1628 mm², giving it a transistor density of 127.8M per mm². The RTX 4070 Mobile has 22,900 million transistors on a 188 mm² die, with a density of 121.8M per mm². The B200 SXM6 is dramatically larger in both absolute transistor count and physical die size, with roughly nine times the transistors and nearly nine times the die area.

Memory configurations differ substantially. The B200 SXM6 uses 180 GB of HBM3e memory with an 8192-bit bus width and bandwidth of 8.19 TB/s. The RTX 4070 Mobile has 8 GB of GDDR6 memory on a 128-bit bus with 256.0 GB/s bandwidth. The B200 SXM6 offers over 32 times the memory bandwidth and over 22 times the memory capacity.

The compute resources are also vastly different. The B200 SXM6 has 18944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores. The RTX 4070 Mobile has 4608 shading units, 144 TMUs, 48 ROPs, 36 RT cores, and 144 tensor cores. The B200 SXM6 has roughly four times the shading units and TMUs, but only half the ROPs. The RTX 4070 Mobile includes dedicated RT cores, which the B200 SXM6 lacks entirely.

Clock behavior differs as well. The B200 SXM6 has a base clock of 120 MHz and a boost clock of 1830 MHz. The RTX 4070 Mobile has a base clock of 1395 MHz and a boost clock of 1695 MHz. The mobile chip starts at a much higher base frequency but boosts to a slightly lower peak. Memory clock is listed as 2000 MHz with 8 Gbps effective for the B200 SXM6 and 2000 MHz with 16 Gbps effective for the RTX 4070 Mobile.

The B200 SXM6 uses a PCIe 6.0 x16 interface, while the RTX 4070 Mobile uses PCIe 4.0 x8. The B200 SXM6 is an SXM Module with a TDP of 1000 W and a suggested PSU of 1400 W. The RTX 4070 Mobile is an IGP with 115 W TDP and no power connectors. The B200 SXM6 has no display outputs, while the RTX 4070 Mobile has portable device dependent outputs. The B200 SXM6 lists no API support, while the RTX 4070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Head-to-Head Benchmarks

The head-to-head benchmark table is empty, and the wins count shows zero for both parts. This makes direct numerical comparison impossible from the recorded measurements. The only benchmark data available belongs to the RTX 4070 Mobile.

The RTX 4070 Mobile delivers its strongest absolute scores in the Geekbench tests. Its OpenCL score of 109197 and Vulkan score of 108367 are close to each other, suggesting consistent performance across both compute APIs. In the Passmark suite, the G3D score of 19587 dominates the other DirectX tests, which range from 85 in DirectX 12 to 223 in DirectX 9. The DirectX 11 score of 179 and DirectX 10 score of 116 are notably lower than the G3D aggregate. The G2D score of 763 and GPU compute score of 8399 round out the set.

The average benchmark score of 27435 places the RTX 4070 Mobile near several rivals in the database. The AMD Radeon RX 6700 XT has an average score of 27425, a delta of 0 percent. The NVIDIA GeForce RTX 3090 scores 27565, which is 0.5 percent higher. The NVIDIA RTX PRO 4000 Blackwell scores 27135, which is 1.1 percent lower. The AMD Radeon Pro Vega 20 scores 27839, which is 1.5 percent higher. These deltas are all within roughly one and a half percent, indicating the RTX 4070 Mobile performs in a tight cluster with these four other GPUs despite being a mobile part.

The B200 SXM6 has no benchmark scores, no average score, and no nearest rivals listed. Its percentile of 50 with zero score suggests it has not been measured in the database, so no head-to-head performance conclusions can be drawn from recorded data alone.

The Verdict

From the data in the database, the NVIDIA GeForce RTX 4070 Mobile is the only one of the two with measured benchmark results. It holds a 73rd percentile ranking among all GPUs and an average score of 27435, with rivals within 1.5 percent on either side. Anyone seeking a GPU with recorded performance data would select the RTX 4070 Mobile, as the B200 SXM6 has no scores to compare.

The B200 SXM6 is a fundamentally different product. Its architecture, memory, and compute resources point toward server-scale acceleration. The 180 GB HBM3e memory with 8.19 TB/s bandwidth, 18944 shading units, and 592 tensor cores are far beyond what the RTX 4070 Mobile offers. Its 1000 W TDP and SXM Module form factor indicate a data center installation, not a portable device. The lack of display outputs and API support confirms it is not intended for graphics output.

The choice depends on the workload context. For mobile graphics and general compute with measured results, the RTX 4070 Mobile is the only option with data. For large-scale server acceleration where raw resources matter more than measured benchmarks, the B200 SXM6 offers vastly more memory, bandwidth, and compute units. The data does not support a performance verdict between the two because no common benchmark exists in the record.

FAQ

Q: Which GPU has a higher percentile ranking in the database?

A: The NVIDIA GeForce RTX 4070 Mobile ranks at the 73rd percentile, while the NVIDIA B200 SXM6 ranks at the 50th percentile.

Q: What is the average benchmark score for each GPU?

A: The RTX 4070 Mobile has an average benchmark score of 27435. The B200 SXM6 has an average benchmark score of zero, with no recorded benchmarks.

Q: How does the RTX 4070 Mobile compare to its nearest rivals?

A: Its average score of 27435 is within 1.5 percent of four rivals: the AMD Radeon RX 6700 XT at 27425, the NVIDIA GeForce RTX 3090 at 27565, the NVIDIA RTX PRO 4000 Blackwell at 27135, and the AMD Radeon Pro Vega 20 at 27839.

Q: What memory configurations do the two GPUs use?

A: The B200 SXM6 uses 180 GB of HBM3e with an 8192-bit bus and 8.19 TB/s bandwidth. The RTX 4070 Mobile uses 8 GB of GDDR6 with a 128-bit bus and 256.0 GB/s bandwidth.

Q: Which GPU has dedicated ray tracing cores?

A: The RTX 4070 Mobile has 36 RT cores. The B200 SXM6 has no RT cores listed in the database.

Q: What is the TDP difference between the two?

A: The B200 SXM6 has a TDP of 1000 W with a suggested PSU of 1400 W. The RTX 4070 Mobile has a TDP of 115 W with no suggested PSU listed.

Specification Differences

The two GPUs differ across nearly every specification category in the database.

Chip and architecture: The B200 SXM6 uses the GB100 chip on Blackwell architecture from the Server Blackwell generation. The RTX 4070 Mobile uses the AD106 chip on Ada Lovelace architecture from the GeForce 40 Mobile generation.

Process and die: Both use TSMC 5 nm, but the B200 SXM6 has 208,000 million transistors on a 1628 mm² die with 127.8M per mm² density. The RTX 4070 Mobile has 22,900 million transistors on a 188 mm² die with 121.8M per mm² density.

Clocks: The B200 SXM6 has a 120 MHz base and 1830 MHz boost clock. The RTX 4070 Mobile has a 1395 MHz base and 1695 MHz boost clock. Memory clock is 2000 MHz with 8 Gbps effective for the B200 SXM6 and 2000 MHz with 16 Gbps effective for the RTX 4070 Mobile.

Memory: The B200 SXM6 has 180 GB of HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth. The RTX 4070 Mobile has 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth.

Compute units: The B200 SXM6 has 18944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores. The RTX 4070 Mobile has 4608 shading units, 144 TMUs, 48 ROPs, 36 RT cores, and 144 tensor cores.

Performance rates: The B200 SXM6 delivers 43.92 GPixel/s pixel rate, 1,083.4 GTexel/s texture rate, 69.34 TFLOPS FP32, and 69.34 TFLOPS FP16. The RTX 4070 Mobile delivers 81.36 GPixel/s pixel rate, 244.1 GTexel/s texture rate, 15.62 TFLOPS FP32, and 15.62 TFLOPS FP16.

Power and form factor: The B200 SXM6 has a 1000 W TDP, is an SXM Module, and requires a 1400 W suggested PSU. The RTX 4070 Mobile has a 115 W TDP, is an IGP, and has no power connectors.

Interface and outputs: The B200 SXM6 uses PCIe 6.0 x16 and has no display outputs. The RTX 4070 Mobile uses PCIe 4.0 x8 and has portable device dependent display outputs.

API support: The B200 SXM6 lists no DirectX, OpenGL, or Vulkan support. The RTX 4070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Release and status: The B200 SXM6 was released on 2024-10-31 with a launch MSRP of 34,999 USD and is Active. The RTX 4070 Mobile was released on 2023-01-02 with no launch MSRP listed and is Active. The B200 SXM6 succeeds Server Hopper and precedes Server Rubin. The RTX 4070 Mobile succeeds GeForce 30 Mobile and precedes GeForce 50 Mobile.