AMD Radeon RX 7600S vs NVIDIA Tesla K40c Comparison

Head-to-Head Benchmarks

The only direct comparison available in the data is the Geekbench OpenCL test, and the result is decisive. The AMD Radeon RX 7600S scores 68,012, while the NVIDIA Tesla K40c scores 17,468. That translates to a delta of -74.3% for the Tesla, meaning the AMD part is roughly 3.9 times faster in this compute workload. The margin is enormous, and it reflects not just generational improvements but a fundamental shift in how each GPU is designed and clocked.

Looking at the broader benchmark landscape, the Tesla K40c has a single benchmark score to its name: 17,468 in Geekbench OpenCL. Its average benchmark score is identical at 17,468, placing it at the 61st percentile of all GPUs. The RX 7600S, by contrast, shows a wider spread of results across multiple test suites, with an average benchmark score of 16,696 and a 60th percentile ranking. That near-identical percentile placement is remarkable given how far apart their raw OpenCL scores are — it suggests the two cards occupy similar relative positions in the overall GPU hierarchy, despite the AMD part’s dominance in the one head-to-head test available.

The RX 7600S also posts strong numbers in other APIs. Its Geekbench Vulkan score is 73,868, which exceeds its OpenCL result. Passmark scores further illustrate its range: 15,408 in G3D, 6,520 in GPU compute, and lower scores in legacy DirectX tests (211 in DirectX 9, 140 in DirectX 11, 74 in DirectX 10, 65 in DirectX 12). The 3DMark Steel Nomad DX12 score is 1,888. These figures are not directly comparable to the Tesla, since the K40c only has OpenCL data, but they show the AMD card is competitive across modern and legacy APIs alike.

Architecture Differences

The two GPUs come from completely different design philosophies and eras. The Tesla K40c is built on NVIDIA’s Kepler architecture, using the GK180 chip, fabricated on a 28 nm process at TSMC. It packs 7,080 million transistors into a die size of 561 mm², yielding a transistor density of 12.6 million per square millimeter. The RX 7600S uses AMD’s RDNA 3.0 architecture with the Navi 33 chip (codename Hotpink Bonefish), fabricated on a 6 nm process, also at TSMC. It contains 13,300 million transistors in a much smaller 204 mm² die, achieving a density of 65.2 million per square millimeter — over five times denser than the K40c.

Clock speeds tell a similar story. The Tesla runs at a base clock of 745 MHz and a boost clock of 876 MHz, with memory clocked at 1,502 MHz (6 Gbps effective). The RX 7600S operates at a 1,500 MHz base and 2,200 MHz boost, with a game clock of 1,865 MHz and memory at 2,000 MHz (16 Gbps effective). The AMD part’s boost clock is 2.5 times higher than the Tesla’s base clock, and its memory clock is more than double.

Memory configurations diverge sharply. The K40c has 12 GB of GDDR5 on a 384-bit bus, providing 288.4 GB/s of bandwidth. The RX 7600S has 8 GB of GDDR6 on a 128-bit bus, delivering 256.0 GB/s. Despite having half the bus width, the AMD card achieves nearly the same bandwidth thanks to faster memory. The Tesla’s larger frame buffer suggests it was designed for high-capacity workloads, while the AMD part prioritizes speed per pin.

The compute resources are also configured very differently. The K40c has 2,880 shading units, 240 texture mapping units, and 48 ROPs. The RX 7600S has 1,792 shading units, 112 TMUs, and 64 ROPs. Though the Tesla has more shaders and TMUs, the AMD card’s higher clocks push its raw throughput higher: 15.77 TFLOPS FP32 versus 5.046 TFLOPS for the K40c. The RX 7600S also supports FP16 at 31.54 TFLOPS (2:1 ratio), while the Tesla has no listed FP16 capability. Pixel and texture rates follow suit: 140.8 GPixel/s and 246.4 GTexel/s for AMD, versus 52.56 GPixel/s and 210.2 GTexel/s for NVIDIA.

Power and physical design are night and day. The Tesla K40c is a dual-slot card with a 245 W TDP, requiring a 550 W power supply and using 1x 6-pin plus 1x 8-pin power connectors. It has no display outputs, underscoring its compute-only role. The RX 7600S is an integrated graphics package (IGP) for mobile, with a 75 W TDP and no external power connectors. Its display outputs are listed as “Portable Device Dependent,” meaning they vary by laptop implementation. The Tesla measures 267 mm (10.5 inches) in length; the AMD part has no listed dimensions, consistent with its mobile IGP nature.

API support differs notably. The K40c supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The RX 7600S supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD part also has 28 ray tracing cores, which the Tesla lacks entirely. The RX 7600S uses PCIe 4.0 x16, while the K40c is limited to PCIe 3.0 x16.

Where Each One Wins

The RX 7600S wins decisively in raw compute throughput, API modernity, and efficiency. Its OpenCL score is 68,012 versus 17,468 for the K40c, a 74.3% advantage. The AMD card’s FP32 rate of 15.77 TFLOPS is over three times the Tesla’s 5.046 TFLOPS. Its pixel rate of 140.8 GPixel/s is more than double, and its texture rate of 246.4 GTexel/s edges out the Tesla’s 210.2 GTexel/s. With FP16 support and 28 ray tracing cores, the RX 7600S is prepared for modern workloads that the Kepler architecture cannot handle. Its 6 nm process and 75 W TDP make it vastly more power-efficient, and its PCIe 4.0 interface doubles the data transfer rate of the older PCIe 3.0.

The Tesla K40c retains advantages in specific areas. Its 12 GB memory capacity is 50% larger than the RX 7600S’s 8 GB, which matters for datasets that exceed 8 GB. Its 384-bit memory bus provides a wider path, and its 288.4 GB/s bandwidth is still competitive despite the AMD card’s newer memory. The Tesla also has more shading units (2,880 versus 1,792) and more TMUs (240 versus 112), which could benefit certain workloads that scale with those resources rather than clock speed. Its dual-slot form factor and discrete card design allow for sustained operation in server environments, though its 245 W TDP demands substantial cooling and power delivery.

In terms of nearest rivals, the Tesla K40c’s closest competitors cluster tightly around its score. The AMD Radeon Pro 460 is just 0.2% behind, the Pro 560 is 0.5% behind, the Radeon 780M is 0.7% behind, and the GeForce RTX 4060 is 1% behind. This suggests the K40c sits in a well-populated performance tier. The RX 7600S’s rivals are similarly close: the NVIDIA T400 4 GB is 0.6% ahead, the T400 is 1.1% behind, the RTX 5090 D V2 is 1.2% behind, and the Tesla M4 is 1.4% ahead. Both cards are surrounded by competitors within a 1.4% band, indicating that their average scores are representative of their respective tiers.

The Verdict

The data is unambiguous: the AMD Radeon RX 7600S is the faster GPU in every measurable compute metric. Its OpenCL score is 68,012 versus 17,468 for the Tesla K40c, a 74.3% lead. Its FP32 throughput of 15.77 TFLOPS is more than triple, and its pixel rate of 140.8 GPixel/s is nearly triple. The RX 7600S also brings modern features — ray tracing cores, FP16 support, DirectX 12 Ultimate, Vulkan 1.4 — that the Tesla simply does not have.

However, the Tesla K40c is not without purpose. Its 12 GB memory capacity is larger, and its 384-bit bus provides substantial bandwidth. For workloads that require more than 8 GB of frame buffer, the Tesla is the only option between these two. Its 28 nm process and 245 W TDP mean it is far less efficient, but it was designed for a different era and a different use case: compute acceleration in servers, where the lack of display outputs is a feature, not a limitation. Its launch MSRP was 7,699 USD, reflecting its professional positioning.

The RX 7600S is the obvious choice for anyone needing modern compute performance, especially in a mobile or power-constrained environment. Its 75 W TDP is less than a third of the Tesla’s, making it suitable for laptops. Its PCIe 4.0 interface and 6 nm process are current-generation technology. The Tesla K40c, being end-of-life, is only relevant for legacy applications or scenarios where its 12 GB capacity is essential.

For raw performance per watt, per dollar in current workloads, the RX 7600S wins outright. For capacity-constrained compute tasks that fit within 12 GB and don’t require modern APIs, the Tesla K40c remains a niche but valid choice. The data shows a generational gap that cannot be bridged by the Tesla’s higher core counts alone.

FAQ

Q: Which GPU has the higher OpenCL benchmark score?

A: The AMD Radeon RX 7600S scores 68,012, while the NVIDIA Tesla K40c scores 17,468, a difference of 74.3% in favor of AMD.

Q: How do their memory capacities compare?

A: The Tesla K40c has 12 GB of GDDR5 memory on a 384-bit bus, while the RX 7600S has 8 GB of GDDR6 on a 128-bit bus. The Tesla has 50% more capacity, but the AMD card’s bandwidth is only slightly lower: 256.0 GB/s versus 288.4 GB/s.

Q: What is the TDP of each card?

A: The Tesla K40c has a TDP of 245 W and requires a 550 W power supply with 1x 6-pin and 1x 8-pin connectors. The RX 7600S has a TDP of 75 W and uses no external power connectors.

Q: Does the Tesla K40c support ray tracing?

A: No. The Tesla K40c has no ray tracing cores. The RX 7600S has 28 ray tracing cores.

Q: What are the nearest rivals for each GPU based on average benchmark score?

A: For the Tesla K40c, the nearest rivals are the AMD Radeon Pro 460 (-0.2%), Radeon Pro 560 (-0.5%), Radeon 780M (-0.7%), and GeForce RTX 4060 (-1%). For the RX 7600S, they are the NVIDIA T400 4 GB (-0.6%), T400 (+1.1%), GeForce RTX 5090 D V2 (+1.2%), and Tesla M4 (-1.4%).

Q: Which GPU has better API support?

A: The RX 7600S supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Tesla K40c supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The AMD card’s DirectX and Vulkan versions are newer.