AMD Radeon R9 M265X vs NVIDIA GeForce GTX 980 Comparison

The AMD Radeon R9 M265X and NVIDIA GeForce GTX 980 represent two vastly different tiers of mobile and desktop graphics hardware, separated by purpose, scale, and performance. While the R9 M265X is a modest mobile part aimed at mainstream laptops, the GTX 980 is a flagship desktop GPU designed for high-end gaming and compute workloads. Benchmark data confirms a decisive performance gap, with the GTX 980 dominating in raw compute and the R9 M265X offering a more power-efficient footprint for its class. This analysis examines their architectural differences, benchmark results, and the specific use cases where each card holds an advantage.

Where Each One Wins

The performance split between these two GPUs is overwhelmingly lopsided, but each card has a clear domain where it excels. The NVIDIA GeForce GTX 980 is the unequivocal winner in every measurable compute and graphics benchmark available in the data. Its Geekbench OpenCL score of 34,676 dwarfs the R9 M265X’s 8,851, representing a 74.5% advantage in that single head-to-head test. The GTX 980 also posts strong results across DirectX and Vulkan APIs, with Passmark scores of 164 in DirectX 9, 83 in DirectX 11, and 46 in DirectX 12, alongside a Geekbench Vulkan score of 22,543. For any workload that stresses raw shading, texturing, or compute throughput, the GTX 980 is the superior choice by a wide margin.

The AMD Radeon R9 M265X, by contrast, wins in the context of its intended market segment. As a mobile GPU with a 28 nm Venus chip and 1,500 million transistors, it is designed for power-constrained laptops where the GTX 980’s 165 W TDP and dual-slot cooler are simply not viable. The R9 M265X’s 44th percentile ranking among all GPUs indicates it sits near the middle of the performance distribution, which is respectable for an integrated-class mobile part. Its advantage is not in raw performance but in fitting into a much smaller thermal and physical envelope. In the data, the R9 M265X has zero benchmark wins, but its existence as a lower-power alternative is its primary value proposition.

Architecture Differences

The two GPUs are built on fundamentally different architectures, reflecting their respective design goals. The AMD Radeon R9 M265X uses the GCN 1.0 architecture on a 28 nm process at TSMC, with a die size of 123 mm² housing 1,500 million transistors. This yields a transistor density of 12.2 million per square millimeter. The GPU features 640 shading units, 40 texture mapping units, and 16 ROPs, which are modest numbers suited to its mobile role. Its compute capabilities are limited to 800.0 GFLOPS of FP32 performance, with no FP16 support listed. The memory subsystem consists of 2 GB of GDDR5 on a 128-bit bus, delivering 64.00 GB/s of bandwidth.

The NVIDIA GeForce GTX 980 employs the Maxwell 2.0 architecture, also fabricated on a 28 nm process at TSMC, but with a much larger 398 mm² die containing 5,200 million transistors. This translates to a transistor density of 13.1 million per square millimeter, slightly higher than the AMD part. The GTX 980’s compute resources are far more substantial: 2,048 shading units, 128 TMUs, and 64 ROPs. Its FP32 throughput is rated at 4.981 TFLOPS, more than six times that of the R9 M265X. The memory configuration is also more robust, with 4 GB of GDDR5 on a 256-bit bus providing 224.4 GB/s of bandwidth. The GTX 980 supports DirectX 12 (12_1), while the R9 M265X only reaches DirectX 12 (11_1), and the NVIDIA card also lists Vulkan 1.4 support compared to the AMD card’s Vulkan 1.2.170.

Head-to-Head Benchmarks

The single direct comparison available in the data is the Geekbench OpenCL test, which measures general-purpose GPU compute performance. The NVIDIA GeForce GTX 980 scores 34,676, while the AMD Radeon R9 M265X scores 8,851. This yields a delta of -74.5%, meaning the GTX 980 is roughly 3.9 times faster in this workload. The margin is enormous and reflects the fundamental differences in shading units, memory bandwidth, and clock speeds. The GTX 980’s base clock of 1,127 MHz and boost clock of 1,216 MHz are nearly double the R9 M265X’s 575 MHz base and 625 MHz boost, which alone accounts for a large portion of the performance gap.

Beyond the head-to-head, the GTX 980’s broader benchmark suite reinforces its dominance. Its Passmark G3D score of 11,095 is a strong indicator of DirectX gaming performance, and its Geekbench Metal score of 15,163 shows capability in Apple’s graphics API. The R9 M265X has no corresponding scores in these tests, so direct comparisons are limited to the OpenCL result. However, the GTX 980’s nearest rivals in the data are mobile parts like the GTX 950M and R9 M360, with average scores around 8,100-8,200, which are far closer to the R9 M265X’s 8,851 than to the GTX 980’s 34,676. This suggests the R9 M265X is competitive with those mid-range mobile GPUs, but the GTX 980 operates in a different performance class entirely.

FAQ

Q: Which GPU has a higher Geekbench OpenCL score?

A: The NVIDIA GeForce GTX 980 scores 34,676, while the AMD Radeon R9 M265X scores 8,851, giving the GTX 980 a 74.5% advantage in this compute benchmark.

Q: How do their memory configurations compare?

A: The GTX 980 has 4 GB of GDDR5 on a 256-bit bus with 224.4 GB/s bandwidth, whereas the R9 M265X has 2 GB of GDDR5 on a 128-bit bus with 64.00 GB/s bandwidth.

Q: What are the TDP and power requirements for each card?

A: The GTX 980 has a TDP of 165 W and requires a 450 W power supply with two 6-pin connectors. The R9 M265X has no TDP listed in the data, indicating a lower power draw suitable for mobile use.

Q: Which card supports newer DirectX versions?

A: The GTX 980 supports DirectX 12 (12_1), while the R9 M265X supports DirectX 12 (11_1). The GTX 980 also lists Vulkan 1.4, compared to the R9 M265X’s Vulkan 1.2.170.

Q: How do their transistor counts and die sizes differ?

A: The GTX 980 has 5,200 million transistors on a 398 mm² die, while the R9 M265X has 1,500 million transistors on a 123 mm² die. The transistor density is 13.1M/mm² for NVIDIA and 12.2M/mm² for AMD.

Q: What is the release timeline for these GPUs?

A: The R9 M265X was released on March 20, 2014, and the GTX 980 on September 18, 2014. Both are now end-of-life products.

Specification Differences

| Specification | AMD Radeon R9 M265X | NVIDIA GeForce GTX 980 |

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

| Architecture | GCN 1.0 | Maxwell 2.0 |

| Process Node | 28 nm | 28 nm |

| Transistors | 1,500 million | 5,200 million |

| Die Size | 123 mm² | 398 mm² |

| Transistor Density | 12.2M / mm² | 13.1M / mm² |

| Base Clock | 575 MHz | 1,127 MHz |

| Boost Clock | 625 MHz | 1,216 MHz |

| Memory Clock | 1000 MHz (4 Gbps effective) | 1753 MHz (7 Gbps effective) |

| Memory Size | 2 GB | 4 GB |

| Memory Bus Width | 128 bit | 256 bit |

| Memory Bandwidth | 64.00 GB/s | 224.4 GB/s |

| Shading Units | 640 | 2,048 |

| TMUs | 40 | 128 |

| ROPs | 16 | 64 |

| Pixel Rate | 10.00 GPixel/s | 77.82 GPixel/s |

| Texture Rate | 25.00 GTexel/s | 155.6 GTexel/s |

| FP32 Performance | 800.0 GFLOPS | 4.981 TFLOPS |

| TDP | Not specified | 165 W |

| Slot Width | Not specified | Dual-slot |

| Power Connectors | Not specified | 2x 6-pin |

| Suggested PSU | Not specified | 450 W |

| Display Outputs | Not specified | 1x DVI, 1x HDMI 2.0, 3x DisplayPort 1.2 |

| DirectX Support | 12 (11_1) | 12 (12_1) |

| Vulkan Support | 1.2.170 | 1.4 |

| Release Date | 2014-03-20 | 2014-09-18 |

| Launch MSRP | Not specified | 549 USD |

The specification table highlights the stark contrast between these two products. The GTX 980 has over three times the transistors, more than three times the shading units, and over three times the memory bandwidth of the R9 M265X. Its clock speeds are nearly double, and its FP32 performance is over six times higher. The R9 M265X, with no TDP or power connector data, is clearly designed for low-power mobile integration, while the GTX 980 is a full-fledged desktop card requiring substantial power and cooling. Both share the same 28 nm process node and PCIe 3.0 x16 interface, but the scale of their respective implementations could not be more different.