AMD Radeon RX 6500M vs NVIDIA GeForce GTX 675MX Comparison

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6500M records an average benchmark score of 10362, placing it in the 48th percentile of all GPUs. The NVIDIA GeForce GTX 675MX records 8427, placing it in the 43rd percentile. The RX 6500M sits roughly 23% higher in average score.

Q: How close are these two GPUs to their nearest rivals?

A: The RX 6500M is nearly tied with the NVIDIA Tesla C2075 (10400, -0.4%) and the AMD Radeon RX 550X (10481, -1.1%). The GTX 675MX is similarly close to the AMD Radeon 880M (8436, -0.1%) and the NVIDIA GeForce MX330 (8458, -0.4%). Both GPUs are clustered tightly with their direct competitors.

Q: What is the only recorded head-to-head benchmark between these two?

A: The database includes one direct comparison: Geekbench OpenCL. The AMD Radeon RX 6500M scores 38586 against 10723 for the NVIDIA GeForce GTX 675MX, a delta of 259.8% in favor of the AMD part.

Q: Do both GPUs support modern APIs?

A: The RX 6500M supports DirectX 12 Ultimate (12_2), Vulkan 1.4, and OpenGL 4.6. The GTX 675MX supports DirectX 12 (11_0), Vulkan 1.2.175, and OpenGL 4.6. The AMD part has a more recent DirectX feature level and a newer Vulkan version.

Q: What are the power requirements for each GPU?

A: The RX 6500M has a TDP of 50 W and uses no power connectors, with an IGP slot width. The GTX 675MX has a TDP of 100 W, also uses no power connectors, and comes as an MXM module.

Q: Which GPU has more memory bandwidth?

A: The RX 6500M delivers 144.0 GB/s over a 64-bit bus with 4 GB of GDDR6. The GTX 675MX delivers 115.2 GB/s over a 256-bit bus with 2 GB of GDDR5. Despite the narrower bus, the newer memory type gives the AMD part higher bandwidth.

Architecture Differences

The two GPUs represent different eras of mobile graphics. The AMD Radeon RX 6500M uses the Navi 24 chip built on RDNA 2.0 architecture, manufactured on a 6 nm process at TSMC. The NVIDIA GeForce GTX 675MX uses the GK104 chip built on Kepler architecture, manufactured on a 28 nm process, also at TSMC. The process node difference is stark: 6 nm versus 28 nm.

Transistor counts reflect the generational gap. The RX 6500M packs 5,400 million transistors into a 107 mm² die, yielding a transistor density of 50.5M per mm². The GTX 675MX has 3,540 million transistors spread across a 294 mm² die, for a density of 12.0M per mm². The AMD chip is more than four times denser, which explains its much lower power draw.

The RX 6500M belongs to the Radeon RX 6000 series, specifically the Navi Mobile (RX 6000M) generation, and was released in January 2022. Its predecessor is listed as Polaris Mobile. The GTX 675MX belongs to the GeForce 600M generation, released in September 2012, with a predecessor in GeForce 500M and a successor in GeForce 700M. Both are marked end-of-life in the database.

Feature support differs substantially. The RX 6500M includes 16 ray tracing cores, which the GTX 675MX lacks entirely. The AMD part also supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the NVIDIA part is limited to DirectX 12 (11_0) and Vulkan 1.2.175. Both support OpenGL 4.6. The newer architecture also brings a 2:1 FP16 ratio (9.830 TFLOPS) on the RX 6500M, whereas the GTX 675MX has no recorded FP16 capability.

The memory subsystems are built differently. The RX 6500M uses 4 GB of GDDR6 on a 64-bit bus, with memory clocked at 2250 MHz (18 Gbps effective). The GTX 675MX uses 2 GB of GDDR5 on a 256-bit bus, with memory clocked at 900 MHz (3.6 Gbps effective). The AMD part's higher bandwidth (144.0 GB/s vs 115.2 GB/s) comes from the much faster memory clock, not bus width.

The Verdict

The data points to a clear winner for modern workloads. The AMD Radeon RX 6500M leads the NVIDIA GeForce GTX 675MX in every recorded metric where both have data. The average benchmark score difference is roughly 23%, and the sole head-to-head OpenCL test shows a 259.8% advantage for the RX 6500M.

The RX 6500M is the pick for anyone running current games or compute workloads. It supports ray tracing hardware, DirectX 12 Ultimate, and Vulkan 1.4, which the GTX 675MX cannot match. The 50 W TDP versus 100 W also makes it far more suitable for thin-and-light laptops. The GTX 675MX is an older Kepler part with no ray tracing, no FP16 support, and a smaller 2 GB frame buffer.

However, the GTX 675MX is not without context. Its 256-bit memory bus and 80 texture mapping units exceed the RX 6500M's 64-bit bus and 64 TMUs, which could matter in bandwidth-sensitive legacy applications. Its 32 ROPs match the AMD part. But given the age gap, the lack of modern API support, and the benchmark data, the RX 6500M is the stronger choice for nearly all use cases.

The RX 6500M's percentile ranking (48th) versus the GTX 675MX's (43rd) reinforces the verdict. Both sit near the middle of the GPU distribution, but the AMD part sits clearly above its rival in raw score and features.

Specification Differences

The two GPUs differ in nearly every core specification. The RX 6500M has 1024 shading units, 64 TMUs, and 32 ROPs, plus 16 ray tracing cores. The GTX 675MX has 960 shading units, 80 TMUs, and 32 ROPs, with no ray tracing cores.

Clock speeds are recorded differently. The RX 6500M has a base clock of 2000 MHz, a boost clock of 2400 MHz, and a game clock of 2191 MHz. The GTX 675MX has no recorded base, boost, or game clocks; only its memory clock is listed at 900 MHz (3.6 Gbps effective). The RX 6500M's memory clock is 2250 MHz (18 Gbps effective).

Memory configurations diverge sharply. The RX 6500M has 4 GB of GDDR6 on a 64-bit bus with 144.0 GB/s bandwidth. The GTX 675MX has 2 GB of GDDR5 on a 256-bit bus with 115.2 GB/s bandwidth.

Compute throughput is not close. The RX 6500M delivers 4.915 TFLOPS FP32 and 9.830 TFLOPS FP16 (2:1). The GTX 675MX delivers 1,255.7 GFLOPS FP32, with no FP16 figure. Pixel rate is 76.80 GPixel/s for the AMD part versus 13.08 GPixel/s for the NVIDIA part. Texture rate is 153.6 GTexel/s versus 52.32 GTexel/s.

Power and form factor differ as well. The RX 6500M is rated at 50 W TDP with an IGP slot width and no power connectors. The GTX 675MX is rated at 100 W TDP with an MXM module slot width and no power connectors. The RX 6500M uses PCIe 4.0 x4; the GTX 675MX uses MXM-B (3.0). Both are marked end-of-life and have no launch MSRP in the database.

Head-to-Head Benchmarks

The database records exactly one head-to-head benchmark between these two GPUs: Geekbench OpenCL. The AMD Radeon RX 6500M scores 38586, while the NVIDIA GeForce GTX 675MX scores 10723. The delta is 259.8% in favor of the AMD part. This is not a marginal lead; it is a three-and-a-half-fold difference in raw compute throughput as measured by OpenCL.

Beyond that single test, the broader benchmark suite shows the RX 6500M's strength across multiple API levels. Its Passmark G3D score is 7531, compared to the GTX 675MX's 8427 average benchmark score across all tests. The RX 6500M also records Passmark scores for DirectX 9 (92), DirectX 10 (52), DirectX 11 (70), DirectX 12 (34), G2D (385), and GPU compute (2669). The GTX 675MX has no recorded Passmark scores, only Geekbench Metal (6131) and Geekbench OpenCL (10723).

The Geekbench Vulkan score for the RX 6500M is 43837, which is not directly comparable to the GTX 675MX's Metal score of 6131 since they test different APIs. However, the OpenCL test is the only apples-to-apples comparison in the database, and it strongly favors the RX 6500M.

The wins tally is 1-0 in favor of the AMD part. No benchmark in the database shows the GTX 675MX ahead.

Where Each One Wins

The AMD Radeon RX 6500M wins in every category where both GPUs have recorded data. It leads in compute performance, as shown by the 259.8% OpenCL advantage. It leads in average benchmark score (10362 vs 8427). It leads in modern API support, with DirectX 12 Ultimate, Vulkan 1.4, and hardware ray tracing. It leads in memory bandwidth (144.0 GB/s vs 115.2 GB/s) and frame buffer size (4 GB vs 2 GB). It leads in pixel rate, texture rate, and FP32 throughput by wide margins. It also draws half the power (50 W vs 100 W), making it the clear choice for portable devices.

The NVIDIA GeForce GTX 675MX has a few narrow advantages in raw specifications, though none translate to benchmark wins in the database. It has a wider memory bus (256-bit vs 64-bit), more texture mapping units (80 vs 64), and a larger die (294 mm² vs 107 mm²). These specifications might matter in specific legacy workloads that favor wide buses and high TMU counts, but the recorded benchmark data shows no scenario where the GTX 675MX outperforms the RX 6500M.

For a practical use-case split: the RX 6500M is the pick for modern gaming, ray-traced titles, DirectX 12 Ultimate workloads, and compute-heavy tasks like OpenCL. The GTX 675MX is not recommended for any workload with recorded benchmark data, given that it loses the only head-to-head test by 259.8%. If you must use a GTX 675MX, it would be for older DirectX 11-era applications where its 256-bit bus and 80 TMUs might offer some benefit, but the database provides no evidence of such a win.

The percentile rankings confirm the split: the RX 6500M sits in the 48th percentile of all GPUs, while the GTX 675MX sits in the 43rd. Both are mid-pack parts, but the AMD card is measurably higher in the distribution. For any new build or upgrade, the RX 6500M is the obvious choice from the recorded data.