NVIDIA GeForce GT 640 vs NVIDIA GeForce RTX 5080 SUPER Comparison

The NVIDIA GeForce GT 640 and the NVIDIA GeForce RTX 5080 SUPER represent two extremes of NVIDIA’s product stack, separated by over a decade of architecture evolution. The data shows a comparison of a 2012 entry-level card against a 2025 flagship, and the benchmark results, while limited, offer a clear picture of their relative standing within the database’s scoring system.

Head-to-Head Benchmarks

The direct benchmark comparison between the GT 640 and the RTX 5080 SUPER is complicated by the fact that the two cards have no overlapping test results in the database. The GT 640 has scores for Geekbench Metal, OpenCL, and Vulkan, while the RTX 5080 SUPER has only a single 3DMark Steel Nomad DX12 result. This means there are zero head-to-head benchmark wins for either card, as no common test was run on both. Instead, we must rely on their average benchmark scores and their percentile rankings to infer relative performance.

The GT 640’s average benchmark score is 3210, derived from its three Geekbench results. Its individual scores are 2086 in Metal, 3736 in OpenCL, and 3809 in Vulkan. The RTX 5080 SUPER’s average score is 3075, which comes solely from its 3DMark Steel Nomad DX12 result. Despite the massive generational gap and architectural differences, the RTX 5080 SUPER’s average score is actually 4.2% lower than the GT 640’s average score. This counterintuitive result is almost certainly an artifact of the different benchmark workloads; Steel Nomad DX12 is a modern, demanding test, while the Geekbench tests are more varied and may not stress the RTX 5080 SUPER’s full capabilities in the same way.

Looking at percentile rankings, the GT 640 sits at the 20th percentile of all GPUs, while the RTX 5080 SUPER sits at the 19th percentile. This suggests that, within this database’s scoring methodology, the two cards are virtually identical in overall standing, with the GT 640 holding a marginal 1-percentile-point advantage. The nearest rival comparisons reinforce this odd parity. The GT 640’s closest rival is the Intel Arc Pro B60, which has an average score of 3182, a 0.9% delta. The RTX 5080 SUPER’s nearest rival is the NVIDIA Quadro P1000, with an average score of 3163, a -2.8% delta. In other words, the RTX 5080 SUPER is scoring closer to a professional workstation card from an earlier era than to any modern flagship, while the GT 640 is also hovering around that same performance tier.

The biggest takeaway from the raw data is that the RTX 5080 SUPER’s single benchmark result does not reflect its theoretical capabilities as described by its specifications. The 3DMark Steel Nomad test may be heavily optimized for specific features, or the card’s drivers may not be fully optimized for this particular workload. The data shows a clear discrepancy: a card with 10752 shading units and 56.28 TFLOPS of FP32 performance should not be scoring within 3.6% of the NVIDIA GeForce GTX 860M, which is one of its nearest rivals listed with a score of 2967. This is a significant outlier that must be interpreted with caution.

Architecture Differences

The architectural gap between these two GPUs is vast. The GT 640 uses the GK107 chip based on the Kepler architecture, built on a 28 nm process at TSMC. It contains 1,270 million transistors on a 118 mm² die, yielding a transistor density of 10.8M per mm². The RTX 5080 SUPER uses the GB203 chip based on the Blackwell 2.0 architecture, also from TSMC, but on a 5 nm process. This newer node packs 45,600 million transistors into a 378 mm² die, achieving a transistor density of 120.6M per mm². In short, the RTX 5080 SUPER has roughly 36 times more transistors in a die that is just over three times larger.

The memory subsystems are equally divergent. The GT 640 has 2 GB of DDR3 memory on a 128-bit bus, providing 28.51 GB/s of bandwidth. The RTX 5080 SUPER has 24 GB of GDDR7 memory on a 256-bit bus, delivering 1.02 TB/s of bandwidth. That is a 36-fold increase in memory capacity and a roughly 36-fold increase in bandwidth, matching the transistor scaling. The clock speeds also tell a story of progression: the GT 640’s memory runs at 891 MHz (1782 Mbps effective), while the RTX 5080 SUPER’s memory runs at 2000 MHz (32 Gbps effective).

The compute resources show a similar scaling. The GT 640 has 384 shading units, 32 TMUs, and 16 ROPs. The RTX 5080 SUPER has 10752 shading units, 336 TMUs, and 112 ROPs. The RTX 5080 SUPER also introduces dedicated hardware that the GT 640 lacks entirely: 84 ray tracing cores and 336 tensor cores. The pixel rate jumps from 7.216 GPixel/s on the GT 640 to 293.1 GPixel/s on the RTX 5080 SUPER, and the texture rate jumps from 28.86 GTexel/s to 879.3 GTexel/s. FP32 compute goes from 692.7 GFLOPS to 56.28 TFLOPS. The RTX 5080 SUPER also supports FP16 at a 1:1 ratio (56.28 TFLOPS), while the GT 640 has no listed FP16 capability.

The feature sets are also from different eras. The GT 640 supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The RTX 5080 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The bus interface has advanced from PCIe 3.0 x16 to PCIe 5.0 x16. The display outputs have also changed: the GT 640 offers 1x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2, while the RTX 5080 SUPER offers 1x HDMI 2.1b and 3x DisplayPort 2.1b.

The Verdict

From the data, the verdict is counterintuitive. If one were to rely solely on the average benchmark scores and percentile rankings, the GT 640 is the “winner” in this database, with a higher average score (3210 vs 3075) and a higher percentile (20 vs 19). However, this is a statistical artifact. The GT 640’s scores come from older, less demanding Geekbench workloads, while the RTX 5080 SUPER’s score comes from a modern DX12 test. The specification data overwhelmingly points to the RTX 5080 SUPER being the vastly superior piece of hardware. The RTX 5080 SUPER has 28 times the shading units, 36 times the memory bandwidth, 81 times the FP32 throughput, and dedicated ray tracing and tensor cores that the GT 640 does not have at all.

The data also shows that the RTX 5080 SUPER’s benchmark score is anomalously low when compared to its nearest rivals. It sits between the NVIDIA Quadro P1000 (3163) and the NVIDIA GeForce 820A (2983), cards with far less impressive specifications. This suggests that the single 3DMark result for the RTX 5080 SUPER is not representative of its true performance, or that the database’s scoring system is not calibrated for such a high-end card. For a user deciding based on the database’s numbers alone, the GT 640 appears to be the better choice, but this would be a severe misjudgment in real-world applications.

Specification Differences

The following table highlights only the fields where the two GPUs differ, per the data:

| Field | NVIDIA GeForce GT 640 | NVIDIA GeForce RTX 5080 SUPER |

|---|---|---|

| Architecture | Kepler | Blackwell 2.0 |

| Generation | GeForce 600 | GeForce 50 |

| Process Node | 28 nm | 5 nm |

| Transistors | 1,270 million | 45,600 million |

| Die Size | 118 mm² | 378 mm² |

| Transistor Density | 10.8M / mm² | 120.6M / mm² |

| Base Clock | null | 2295 MHz |

| Boost Clock | null | 2617 MHz |

| Memory Clock | 891 MHz / 1782 Mbps effective | 2000 MHz / 32 Gbps effective |

| Memory Size | 2 GB | 24 GB |

| Memory Type | DDR3 | GDDR7 |

| Memory Bus Width | 128 bit | 256 bit |

| Memory Bandwidth | 28.51 GB/s | 1.02 TB/s |

| Shading Units | 384 | 10752 |

| TMUs | 32 | 336 |

| ROPs | 16 | 112 |

| RT Cores | null | 84 |

| Tensor Cores | null | 336 |

| Pixel Rate | 7.216 GPixel/s | 293.1 GPixel/s |

| Texture Rate | 28.86 GTexel/s | 879.3 GTexel/s |

| FP32 | 692.7 GFLOPS | 56.28 TFLOPS |

| FP16 | null | 56.28 TFLOPS (1:1) |

| TDP | 65 W | 415 W |

| Slot Width | Single-slot | Dual-slot |

| Power Connectors | None | 1x 16-pin |

| Suggested PSU | 250 W | null |

| Bus Interface | PCIe 3.0 x16 | PCIe 5.0 x16 |

| Display Outputs | 1x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2 | 1x HDMI 2.1b, 3x DisplayPort 2.1b |

| DirectX | 12 (11_0) | 12 Ultimate (12_2) |

| Vulkan | 1.2.175 | 1.4 |

| Dimensions | 145 mm (5.7 inches) length | 304 mm (12 inches) length, 137 mm height, 40 mm width |

| Production Status | End-of-life | Active |

| Release Date | 2012-06-04 | 2025-12-31 |

| Launch MSRP | 99 USD | 999 USD |

| Avg Benchmark Score | 3210 | 3075 |

| Percentile | 20 | 19 |

FAQ

Q: Which GPU has the higher average benchmark score in the database?

A: The NVIDIA GeForce GT 640 has a higher average benchmark score of 3210, compared to the NVIDIA GeForce RTX 5080 SUPER’s score of 3075.

Q: What is the difference in memory bandwidth between the two cards?

A: The GT 640 has a memory bandwidth of 28.51 GB/s, while the RTX 5080 SUPER has a memory bandwidth of 1.02 TB/s.

Q: Does the GT 640 support ray tracing?

A: No, the GT 640 has no ray tracing cores listed, while the RTX 5080 SUPER has 84 RT cores.

Q: What is the launch MSRP of the RTX 5080 SUPER?

A: The launch MSRP of the RTX 5080 SUPER is 999 USD.

Q: How does the RTX 5080 SUPER compare to its nearest rival, the NVIDIA Quadro P1000?

A: The RTX 5080 SUPER has an average score of 3075, which is 2.8% lower than the Quadro P1000’s score of 3163.

Q: What is the process node for each GPU?

A: The GT 640 is built on a 28 nm process, while the RTX 5080 SUPER is built on a 5 nm process.

Where Each One Wins

Based strictly on the data, the GT 640 wins in the context of this database’s benchmark scoring. It has a higher average score, a higher percentile rank, and it beats its nearest rivals by a larger margin (0.9% ahead of the Intel Arc Pro B60) than the RTX 5080 SUPER trails its nearest rival (-2.8% behind the Quadro P1000). The GT 640 also wins on power efficiency, with a TDP of 65 W versus the RTX 5080 SUPER’s 415 W. It is also a smaller card at 145 mm in length, versus the RTX 5080 SUPER’s 304 mm, and it requires no external power connectors.

The RTX 5080 SUPER wins on every single performance specification. It has more memory, more bandwidth, more shading units, higher clock rates, and vastly higher compute throughput. It also wins on modern feature support, including DirectX 12 Ultimate, Vulkan 1.4, ray tracing cores, and tensor cores. The RTX 5080 SUPER is the clear winner for any modern gaming or compute workload, despite its poor showing in the database’s single benchmark. The GT 640 is the winner only in the context of legacy applications that match its older API support and its low power draw. For a user with a modern PC, the RTX 5080 SUPER is the only viable choice, as the GT 640’s 2 GB of DDR3 memory and 28.51 GB/s bandwidth would be a severe bottleneck in any current software.