AMD Radeon 550X vs NVIDIA GeForce GTX 465 Comparison

The NVIDIA GeForce GTX 465 and AMD Radeon 550X are separated by more than just their release dates; the data reveals two fundamentally different approaches to GPU design. In the single available cross-benchmark, the GeForce GTX 465 posts a Geekbench OpenCL score of 9294, while the Radeon 550X scores 8866, giving NVIDIA a 4.8% lead in that specific test. However, the AMD card counters with a Vulkan score of 8970, a test the older Fermi architecture cannot run, and the overall picture is far more nuanced than a single percentage suggests.

Head-to-Head Benchmarks

The only direct head-to-head benchmark available is Geekbench OpenCL, where the NVIDIA GeForce GTX 465 wins with a score of 9294 against the AMD Radeon 550X's 8866. That 4.8% delta is modest, placing both cards in a similar performance tier. To contextualize this, the GTX 465's nearest rivals include the NVIDIA GeForce GTX 960 at 9273 (a 0.2% gap) and the AMD Radeon Vega 8 at 9221 (a 0.8% gap), showing that the 2010 card sits squarely in the middle of a cluster of newer hardware. The Radeon 550X, meanwhile, trails slightly behind the GTX 465 but is nearly identical to the AMD Radeon Pro WX 5100, which scores 8863 (a 0.6% difference), and the AMD Radeon R9 M265X at 8851 (a 0.8% difference).

The 4.8% advantage for the GTX 465 in OpenCL is small enough to be considered within run-to-run variance, yet it is consistent with the card's higher raw memory bandwidth of 102.7 GB/s versus the 550X's 112.0 GB/s — interestingly, the AMD card actually has higher bandwidth, suggesting the NVIDIA win comes from other architectural factors. The Radeon 550X, however, has a second benchmark result: Geekbench Vulkan at 8970. Since the GTX 465's DirectX 12 support is limited to feature level 11_0 and it has no Vulkan support listed, this test is effectively uncontested. The 550X's Vulkan score is 1.2% higher than its own OpenCL score, indicating the GCN 4.0 architecture handles the newer API slightly better.

When comparing average benchmark scores, the GTX 465 averages 9294 (its only score), placing it at the 46th percentile of all GPUs. The Radeon 550X averages 8918 across its two tests, sitting at the 45th percentile. This one-percentile difference reinforces the narrow gap between the two, but the percentile ranks tell a crucial story: both are mid-pack performers, far from enthusiast territory but not obsolete either.

Where Each One Wins

The NVIDIA GeForce GTX 465 wins decisively in raw compute density per transistor. Its 855.4 GFLOPS of FP32 performance comes from 352 shading units, while the Radeon 550X achieves 1,247.2 GFLOPS from 512 shading units. However, the GTX 465 achieves its score with a 40 nm process and 3,100 million transistors on a 529 mm² die, whereas the Radeon 550X uses a 14 nm process with 2,200 million transistors on a mere 103 mm² die. This means the Radeon 550X delivers 45.8% more FP32 throughput while using 29% fewer transistors and occupying 80.5% less silicon area.

The Radeon 550X wins on virtually every modern feature checklist. It supports DirectX 12 at feature level 12_0, while the GTX 465 only reaches 11_0. The 550X has Vulkan 1.3 support; the GTX 465 has none listed. The 550X doubles the memory capacity to 2 GB versus 1 GB, and its 112.0 GB/s bandwidth edges out the GTX 465's 102.7 GB/s. The AMD card also offers a boost clock of 1218 MHz (with a 1082 MHz base), while the GTX 465 lists no boost clock at all. In terms of display outputs, the 550X provides HDMI 2.0b and DisplayPort 1.4a, whereas the GTX 465 is limited to DVI and mini-HDMI 1.3a.

The GTX 465 wins on raw rasterization throughput in one specific metric: its 32 ROPs outnumber the 550X's 16, giving it a pixel rate of 13.38 GPixel/s compared to 19.49 GPixel/s for the AMD card — wait, that is actually a win for AMD. Correcting course: the data shows the 550X has a higher pixel rate (19.49 vs 13.38) and a higher texture rate (38.98 vs 26.75 GTexel/s) despite having fewer TMUs (32 vs 44). The GTX 465's advantage lies purely in its higher ROP count (32 vs 16), which historically benefits certain fill-rate-bound workloads, but the benchmark data does not isolate that scenario.

Architecture Differences

The architectural gulf between these two GPUs spans nearly a decade of design philosophy. The NVIDIA GeForce GTX 465 uses the GF100 chip based on Fermi architecture, manufactured on TSMC's 40 nm process. It packs 3,100 million transistors into a massive 529 mm² die, yielding a transistor density of just 5.9M per mm². In contrast, the AMD Radeon 550X uses the Lexa chip based on GCN 4.0 (Polaris generation), built on GlobalFoundries' 14 nm process. It fits 2,200 million transistors into just 103 mm², achieving a density of 21.4M per mm² — more than 3.6 times the transistor density of the Fermi chip.

Memory subsystems differ significantly. The GTX 465 uses a 256-bit memory bus with 1024 MB of GDDR5, while the 550X uses a 128-bit bus with 2 GB of GDDR5. The narrower bus on the AMD card is compensated by faster memory clocks: 1750 MHz (7 Gbps effective) versus 802 MHz (3.2 Gbps effective) on the NVIDIA card. This results in the 550X having slightly higher bandwidth (112.0 GB/s vs 102.7 GB/s) despite half the bus width.

Compute resources are distributed differently. The GTX 465 has 352 shading units, 44 TMUs, and 32 ROPs. The 550X has 512 shading units, 32 TMUs, and 16 ROPs. The AMD card has 45.5% more shading units, but the NVIDIA card has 2x the ROPs. The FP32 output favors AMD at 1,247.2 GFLOPS versus 855.4 GFLOPS, and the 550X also supports FP16 at a 1:1 ratio (1,247.2 GFLOPS), a capability the GTX 465 does not list. Power consumption tells a stark story: the GTX 465 has a 200 W TDP requiring dual 6-pin connectors and a 550 W suggested PSU, while the 550X sips 50 W with no power connectors and a 250 W suggested PSU.

FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The NVIDIA GeForce GTX 465 scores 9294, which is 4.8% higher than the AMD Radeon 550X's 8866 in the same test.

Q: Does the Radeon 550X support Vulkan?

A: Yes, the Radeon 550X lists Vulkan 1.3 support and scores 8970 in Geekbench Vulkan. The GTX 465 has no Vulkan support listed.

Q: How do their power requirements compare?

A: The GTX 465 has a 200 W TDP and requires a 550 W suggested PSU with dual 6-pin connectors. The Radeon 550X has a 50 W TDP, needs no power connectors, and suggests a 250 W PSU.

Q: Which card has more memory?

A: The Radeon 550X has 2 GB of GDDR5, double the GTX 465's 1024 MB. The 550X also has higher bandwidth at 112.0 GB/s versus 102.7 GB/s.

Q: What are their DirectX capabilities?

A: The Radeon 550X supports DirectX 12 at feature level 12_0. The GTX 465 supports DirectX 12 only at feature level 11_0.

Q: Which card has better transistor density?

A: The Radeon 550X achieves 21.4M transistors per mm² on a 14 nm process, compared to the GTX 465's 5.9M per mm² on 40 nm — a 3.6x difference.

Specification Differences

| Specification | NVIDIA GeForce GTX 465 | AMD Radeon 550X |

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

| Chip | GF100 | Lexa |

| Architecture | Fermi | GCN 4.0 |

| Process Node | 40 nm | 14 nm |

| Foundry | TSMC | GlobalFoundries |

| Transistors | 3,100 million | 2,200 million |

| Die Size | 529 mm² | 103 mm² |

| Transistor Density | 5.9M / mm² | 21.4M / mm² |

| Base Clock | Not listed | 1082 MHz |

| Boost Clock | Not listed | 1218 MHz |

| Memory Clock | 802 MHz (3.2 Gbps effective) | 1750 MHz (7 Gbps effective) |

| Memory Size | 1024 MB | 2 GB |

| Memory Bus Width | 256 bit | 128 bit |

| Memory Bandwidth | 102.7 GB/s | 112.0 GB/s |

| Shading Units | 352 | 512 |

| TMUs | 44 | 32 |

| ROPs | 32 | 16 |

| Pixel Rate | 13.38 GPixel/s | 19.49 GPixel/s |

| Texture Rate | 26.75 GTexel/s | 38.98 GTexel/s |

| FP32 Performance | 855.4 GFLOPS | 1,247.2 GFLOPS |

| FP16 Performance | Not listed | 1,247.2 GFLOPS (1:1) |

| TDP | 200 W | 50 W |

| Power Connectors | 2x 6-pin | None |

| Suggested PSU | 550 W | 250 W |

| Bus Interface | PCIe 2.0 x16 | PCIe 3.0 x8 |

| Display Outputs | 2x DVI, 1x mini-HDMI 1.3a | 1x DVI, 1x HDMI 2.0b, 1x DisplayPort 1.4a |

| DirectX | 12 (11_0) | 12 (12_0) |

| Vulkan | Not listed | 1.3 |

| Dimensions | 241 mm (9.5 inches) | 145 mm (5.7 inches) |

| Launch MSRP | 279 USD | Not listed |

The Verdict

The data paints a clear picture for different use cases. The NVIDIA GeForce GTX 465 wins the only direct benchmark comparison, scoring 4.8% higher in Geekbench OpenCL, and it does so with a 256-bit memory bus and 32 ROPs that suggest strength in memory-bandwidth-intensive or fill-rate-bound legacy workloads. Its percentile rank of 46 versus the 550X's 45 confirms they are peers in overall performance.

However, the AMD Radeon 550X is the more rational choice for nearly every modern scenario. It delivers 45.8% more FP32 compute, supports FP16 at full rate, has double the memory, and offers modern API support including DirectX 12_0 and Vulkan 1.3. Its 50 W TDP means it can run in systems where the GTX 465's 200 W requirement is simply not feasible. The 550X is also physically smaller at 145 mm versus 241 mm, making it compatible with compact chassis.

For users running legacy applications that favor the Fermi architecture's ROP throughput, the GTX 465's benchmark victory is meaningful. For anyone building or upgrading a system today, the Radeon 550X's combination of higher compute throughput, modern feature support, and drastically lower power draw makes it the data-backed recommendation. The GTX 465's single benchmark win does not compensate for its lack of Vulkan support, older DirectX feature level, and four times the power consumption.