AMD Radeon 660M vs NVIDIA GeForce GTX TITAN Comparison

FAQ

Q: How does the NVIDIA GeForce GTX TITAN compare to the AMD Radeon 660M in overall benchmark scores?

A: The GTX TITAN has an average benchmark score of 14,373, while the Radeon 660M scores 13,812. This places the TITAN approximately 4.1% higher on average, with both GPUs sitting near the 55th-56th percentile of all GPUs.

Q: Which GPU wins in Geekbench OpenCL, and by how much?

A: The GTX TITAN wins decisively in Geekbench OpenCL with a score of 24,873 versus the Radeon 660M's 12,876. That is a 93.2% advantage for the NVIDIA card in this compute workload.

Q: Which GPU wins in Geekbench Vulkan, and what is the margin?

A: The AMD Radeon 660M wins in Geekbench Vulkan with 14,748 points against the GTX TITAN's 10,027. The Radeon leads by 32% in this API-specific test.

Q: What are the nearest rivals for each GPU according to the data?

A: The GTX TITAN's closest rival is the AMD Radeon RX Vega 11 (14,385, 0.1% higher), followed by the NVIDIA GeForce GTX 965M (14,404, 0.2% higher). The Radeon 660M's nearest rival is the NVIDIA RTX A2000 Mobile (13,821, 0.1% higher) and the AMD Radeon RX 7900 XT (13,745, 0.5% lower).

Q: What is the transistor density difference between these two GPUs?

A: The Radeon 660M packs 63.0 million transistors per square millimeter on a 6 nm process, while the GTX TITAN has 12.6 million per square millimeter on 28 nm. This represents a 5x density advantage for the AMD part.

Q: Do both GPUs support the same DirectX version?

A: No. The Radeon 660M supports DirectX 12 Ultimate (12_2), while the GTX TITAN supports DirectX 12 (11_0). The AMD part also supports Vulkan 1.4, whereas the TITAN supports Vulkan 1.2.175.

Architecture Differences

The NVIDIA GeForce GTX TITAN is built on the GK110 chip using the Kepler architecture, manufactured on a 28 nm process at TSMC. The die measures 561 mm² and contains 7,080 million transistors. This is a discrete desktop GPU from the GeForce 700 generation, released in February 2013. The Radeon 660M, by contrast, uses the Rembrandt chip with RDNA 2.0 architecture, fabricated on a 6 nm process. Its die is far smaller at 208 mm² but contains 13,100 million transistors, yielding a dramatically higher transistor density.

The TITAN has 2,688 shading units, 224 texture mapping units, and 48 ROPs. The Radeon 660M is an integrated graphics processor (IGP) with 384 shading units, 24 TMUs, and 16 ROPs. The AMD part features 6 ray tracing cores, which the NVIDIA Kepler GPU lacks entirely. The Radeon 660M supports DirectX 12 Ultimate (12_2), while the TITAN only reaches DirectX 12 (11_0). Both support OpenGL 4.6, but the AMD GPU supports Vulkan 1.4 versus the TITAN's Vulkan 1.2.175.

Memory architecture differs fundamentally. The TITAN uses 6 GB of GDDR5 over a 384-bit bus, delivering 288.4 GB/s of bandwidth. The Radeon 660M uses system shared memory with system-dependent bandwidth, meaning its performance scales with the host system's RAM configuration. The TITAN's memory clock is 1502 MHz (6 Gbps effective), while the Radeon's memory clock is listed as "System Shared."

The process node difference is stark: 28 nm versus 6 nm. This allows the Radeon 660M to achieve 63.0M transistors per mm² compared to the TITAN's 12.6M per mm². Power consumption also diverges sharply, with the TITAN rated at 250 W TDP and the Radeon 660M at 40 W TDP. The TITAN requires a dual-slot cooler with 1x 6-pin and 1x 8-pin power connectors and a 600 W suggested PSU, while the Radeon 660M is an IGP with no power connectors.

Head-to-Head Benchmarks

The head-to-head data reveals a split between two different compute APIs. In Geekbench OpenCL, the NVIDIA GeForce GTX TITAN dominates with a score of 24,873 against the AMD Radeon 660M's 12,876. This 93.2% delta is the largest margin in either direction. The TITAN's massive shading unit count and dedicated GDDR5 bandwidth contribute to this result, as OpenCL compute tasks favor the discrete GPU's raw throughput.

In Geekbench Vulkan, the tables turn completely. The Radeon 660M scores 14,748, while the TITAN manages only 10,027. The AMD part leads by 32% in this test. Vulkan is a lower-overhead API that benefits from modern architecture features, and the Radeon 660M's RDNA 2.0 design with 6 ray tracing cores and newer instruction set appears to handle this workload more efficiently despite having far fewer shading units.

The average benchmark scores reflect a close overall race. The TITAN's average of 14,373 is only 561 points higher than the Radeon 660M's 13,812. Both GPUs sit at similar percentiles (56 for TITAN, 55 for Radeon), indicating they occupy nearly the same performance tier in the broader GPU landscape. The TITAN's nearest rivals include the AMD Radeon RX Vega 11 (14,385, 0.1% higher) and NVIDIA GeForce GTX 965M (14,404, 0.2% higher), while the Radeon 660M sits close to the NVIDIA RTX A2000 Mobile (13,821, 0.1% higher) and AMD Radeon RX 570X (13,871, 0.4% higher).

Specification Differences

The two GPUs differ across nearly every specification field. The GTX TITAN has a base clock of 836 MHz and boost clock of 876 MHz, while the Radeon 660M runs at 1500 MHz base and 1900 MHz boost. The TITAN's FP32 compute is 4.709 TFLOPS versus the Radeon's 1,459.2 GFLOPS. The Radeon 660M offers FP16 at 2.918 TFLOPS (2:1), which the TITAN does not list. Pixel rate favors the TITAN at 49.06 GPixel/s versus 30.40 GPixel/s, and texture rate heavily favors the TITAN at 196.2 GTexel/s versus 45.60 GTexel/s.

Memory capacity differs completely: 6 GB GDDR5 versus system shared. Bus width is 384-bit for the TITAN, while the Radeon uses system shared memory. Bandwidth is 288.4 GB/s for the TITAN and system dependent for the Radeon. The TITAN has 48 ROPs and 224 TMUs; the Radeon has 16 ROPs and 24 TMUs. The Radeon 660M has 6 ray tracing cores, while the TITAN has none.

The TITAN uses PCIe 3.0 x16, while the Radeon 660M uses PCIe 4.0 x8. Display outputs differ: the TITAN offers 2x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2, while the Radeon's outputs are portable device dependent. The TITAN is a dual-slot card measuring 267 mm in length, 111 mm in height, and 38 mm in width. The Radeon 660M has no listed dimensions. The TITAN has a launch MSRP of 999 USD, while the Radeon has no launch MSRP listed.

Where Each One Wins

The NVIDIA GeForce GTX TITAN wins in OpenCL compute tasks by a massive 93.2% margin. Its 2,688 shading units and 288.4 GB/s of dedicated bandwidth provide substantial raw compute throughput. The TITAN also leads in pixel rate (49.06 GPixel/s) and texture rate (196.2 GTexel/s), making it better suited for workloads that rely on high fill rates. Its 6 GB frame buffer provides ample capacity for large textures or datasets.

The AMD Radeon 660M wins in Vulkan workloads by 32%, indicating better optimization for modern, low-overhead graphics APIs. Its 6 ray tracing cores provide hardware acceleration for ray-traced effects, a feature entirely absent on the TITAN. The Radeon runs at much higher clock speeds (1900 MHz boost versus 876 MHz), and its 6 nm process allows far better energy efficiency at 40 W versus 250 W. The Radeon also supports DirectX 12 Ultimate, which includes features like ray tracing and mesh shaders that the TITAN cannot access.

For systems where power draw and physical space matter, the Radeon 660M's IGP form factor eliminates the need for a discrete card, power connectors, or additional cooling. The TITAN requires a 600 W PSU and dual-slot clearance. For users with existing PCIe 4.0 platforms, the Radeon's PCIe 4.0 x8 interface offers newer connectivity, while the TITAN relies on PCIe 3.0 x16.

The Verdict

The data shows a clear split based on workload type. For OpenCL compute, the NVIDIA GeForce GTX TITAN is the definitive choice, outperforming the Radeon 660M by 93.2%. Its 4.709 TFLOPS FP32 throughput, 288.4 GB/s bandwidth, and 6 GB of dedicated VRAM make it far more capable for compute-heavy tasks that leverage these resources. The TITAN's average benchmark score of 14,373 also edges out the Radeon's 13,812, and its percentile ranking (56) is one point higher.

For Vulkan-based gaming or modern graphics workloads, the AMD Radeon 660M wins by 32%. Its support for DirectX 12 Ultimate and Vulkan 1.4, along with 6 ray tracing cores, positions it for contemporary graphics features that the Kepler-based TITAN cannot handle. The Radeon's 1900 MHz boost clock and 2.918 TFLOPS FP16 performance also indicate better efficiency in half-precision workloads.

The overall average benchmark scores are close, with the TITAN holding just a 4.1% advantage. Both GPUs sit within 0.5% of rivals like the AMD Radeon RX Vega 11 and NVIDIA RTX A2000 Mobile, placing them in the same performance tier. The deciding factor should be the specific API and workload. Users prioritizing OpenCL compute and raw fill rates should choose the GTX TITAN. Users needing Vulkan performance, ray tracing, and modern API support should choose the Radeon 660M. The Radeon's 40 W TDP also makes it the only viable option for ultra-low-power or integrated systems.