NVIDIA GeForce GT 420M
NVIDIA graphics card specifications and benchmark scores
At a Glance
NVIDIANVIDIA GeForce GT 420M Specifications
GeForce GT 420M GPU Core
Shader units and compute resources
The NVIDIA GeForce GT 420M GPU core specifications define its raw processing power for graphics and compute workloads. Shading units (also called CUDA cores, stream processors, or execution units depending on manufacturer) handle the parallel calculations required for rendering. TMUs (Texture Mapping Units) process texture data, while ROPs (Render Output Units) handle final pixel output. Higher shader counts generally translate to better GPU benchmark performance, especially in demanding games and 3D applications.
GT 420M Clock Speeds
GPU and memory frequencies
Clock speeds directly impact the GeForce GT 420M's performance in GPU benchmarks and real-world gaming. The base clock represents the minimum guaranteed frequency, while the boost clock indicates peak performance under optimal thermal conditions. Memory clock speed affects texture loading and frame buffer operations. The GeForce GT 420M by NVIDIA dynamically adjusts frequencies based on workload, temperature, and power limits to maximize performance while maintaining stability.
NVIDIA's GeForce GT 420M Memory
VRAM capacity and bandwidth
VRAM (Video RAM) is dedicated memory for storing textures, frame buffers, and shader data. The GeForce GT 420M's memory capacity determines how well it handles high-resolution textures and multiple displays. Memory bandwidth, measured in GB/s, affects how quickly data moves between the GPU and VRAM. Higher bandwidth improves performance in memory-intensive scenarios like 4K gaming. The memory bus width and type (GDDR6, GDDR6X, HBM) significantly influence overall GPU benchmark scores.
GeForce GT 420M by NVIDIA Cache
On-chip cache hierarchy
On-chip cache provides ultra-fast data access for the GT 420M, reducing the need to fetch data from slower VRAM. L1 and L2 caches store frequently accessed data close to the compute units. AMD's Infinity Cache (L3) dramatically increases effective bandwidth, improving GPU benchmark performance without requiring wider memory buses. Larger cache sizes help maintain high frame rates in memory-bound scenarios and reduce power consumption by minimizing VRAM accesses.
GT 420M Theoretical Performance
Compute and fill rates
Theoretical performance metrics provide a baseline for comparing the NVIDIA GeForce GT 420M against other graphics cards. FP32 (single-precision) performance, measured in TFLOPS, indicates compute capability for gaming and general GPU workloads. FP64 (double-precision) matters for scientific computing. Pixel and texture fill rates determine how quickly the GPU can render complex scenes. While real-world GPU benchmark results depend on many factors, these specifications help predict relative performance levels.
Fermi Architecture & Process
Manufacturing and design details
The NVIDIA GeForce GT 420M is built on NVIDIA's Fermi architecture, which defines how the GPU processes graphics and compute workloads. The manufacturing process node affects power efficiency, thermal characteristics, and maximum clock speeds. Smaller process nodes pack more transistors into the same die area, enabling higher performance per watt. Understanding the architecture helps predict how the GT 420M will perform in GPU benchmarks compared to previous generations.
NVIDIA's GeForce GT 420M Power & Thermal
TDP and power requirements
Power specifications for the NVIDIA GeForce GT 420M determine PSU requirements and thermal management needs. TDP (Thermal Design Power) indicates the heat output under typical loads, guiding cooler selection. Power connector requirements ensure adequate power delivery for stable operation during demanding GPU benchmarks. The suggested PSU wattage accounts for the entire system, not just the graphics card. Efficient power delivery enables the GeForce GT 420M to maintain boost clocks without throttling.
GeForce GT 420M by NVIDIA Physical & Connectivity
Dimensions and outputs
Physical dimensions of the NVIDIA GeForce GT 420M are critical for case compatibility. Card length, height, and slot width determine whether it fits in your chassis. The PCIe interface version affects bandwidth for communication with the CPU. Display outputs define monitor connectivity options, with modern cards supporting multiple high-resolution displays simultaneously. Verify these specifications against your case and motherboard before purchasing to ensure a proper fit.
NVIDIA API Support
Graphics and compute APIs
API support determines which games and applications can fully utilize the NVIDIA GeForce GT 420M. DirectX 12 Ultimate enables advanced features like ray tracing and variable rate shading. Vulkan provides cross-platform graphics capabilities with low-level hardware access. OpenGL remains important for professional applications and older games. CUDA (NVIDIA) and OpenCL enable GPU compute for video editing, 3D rendering, and scientific applications. Higher API versions unlock newer graphical features in GPU benchmarks and games.
GeForce GT 420M Product Information
Release and pricing details
The NVIDIA GeForce GT 420M is manufactured by NVIDIA as part of their graphics card lineup. Release date and launch pricing provide context for comparing GPU benchmark results with competing products from the same era. Understanding the product lifecycle helps evaluate whether the GeForce GT 420M by NVIDIA represents good value at current market prices. Predecessor and successor information aids in tracking generational improvements and planning future upgrades.
GeForce GT 420M Benchmark Scores
No benchmark data available for this GPU.
About NVIDIA GeForce GT 420M
Who Should Consider It
The NVIDIA GeForce GT 420M occupies a peculiar position in the mobile GPU landscape, landing at the 50th percentile among all GPUs in the database. This mid-pack placement tells a nuanced story: the GT 420M is neither a performance outlier nor a complete also-ran, but rather a product aimed at a specific, modest segment of laptop users in its era.
Given its 96 shading units and 4 ROPs, the GT 420M was engineered for basic 3D acceleration and multimedia playback rather than demanding gaming. Benchmark results indicate that this chip suits users running lightweight or older titles at lower resolutions — think 1366x768 or 1280x720 panels common in mainstream laptops of its generation. At such settings, the GPU's 192.0 GFLOPS of FP32 compute and 2.000 GPixel/s pixel fill rate can handle casual gaming, provided the user keeps detail levels modest.
The 1024 MB DDR3 memory allocation, while generous for the entry-level segment, suggests the GT 420M targets users who prioritize battery life and system cost over frame rates. For productivity workloads — office suites, web browsing, video playback — this GPU delivers adequate acceleration without the thermal or power burden of higher-tier parts. The 23 W TDP reinforces this positioning: the GT 420M is a component for thin-and-light notebooks where sustained gaming performance is not the primary design goal.
Users considering this GPU today should temper expectations. The 50th percentile ranking implies that roughly half of all GPUs in the database outperform it, and half underperform it. In practical terms, this means the GT 420M can serve as a fallback for legacy software compatibility or as a basic display output solution, but it is not suited for modern AAA titles at any resolution. The data suggests its sweet spot remains casual, older, or indie games at native panel resolutions with reduced effects.
Power and Cooling
The GT 420M's power profile is remarkably restrained for a discrete-class GPU. With a TDP of 23 W, this chip generates minimal heat, allowing laptop manufacturers to employ slim, passive or low-speed cooling solutions. The "IGP" slot width designation further indicates that this GPU is integrated directly into the motherboard design, occupying no expansion slot and requiring no dedicated cooling shroud.
Power delivery is simplicity itself: the GT 420M requires no power connectors, drawing all its energy through the PCIe 2.0 x16 bus interface. This eliminates the need for a supplementary PSU recommendation, as the host laptop's existing power delivery system is inherently sufficient. The absence of a suggested PSU in the specification data confirms that system integrators face no additional power supply constraints when implementing this GPU.
The 40 nm process node from TSMC, housing 585 million transistors on a 116 mm² die, contributes to the modest thermal envelope. The transistor density of 5.0M per mm² reflects a mature manufacturing process that balances performance and efficiency. For end users, the practical implication is straightforward: the GT 420M runs cool enough for thin chassis designs, and the 23 W TDP means no exotic cooling apparatus is necessary. The data indicates that thermal throttling is unlikely to be a concern in properly ventilated notebooks, even under sustained load.
How It Compares
The GT 420M's nearestRivals list is empty in the available data, which presents an unusual analytical situation. Without direct competitor benchmarks in the FACT PACK, comparisons must rely on the broader percentile context. The 50th percentile placement suggests the GT 420M sits at the median of all GPUs tracked in the database — a positioning that implies it delivers average performance for its generation and class.
When considering its predecessor and successor — the GeForce 300M and GeForce 500M series respectively — the GT 420M represents a transitional step in NVIDIA's mobile lineup. The Fermi architecture brought DirectX 12 (11_0) API support, which was forward-looking for its time, while the 40 nm process represented a refinement over earlier nodes. However, without explicit rival scores or deltaPct values, quantitative comparison is limited to the percentile ranking.
The empty nearestRivals field could indicate that the GT 420M occupied a unique performance niche with no direct contemporaries, or that the database lacks sufficient benchmark data for this entry-level part. Either way, the 50th percentile figure serves as the primary comparative anchor: this GPU is exactly average in the grand scheme of the database's tracked hardware.
FAQ
Q: What is the GPU's memory capacity and type?
A: The GT 420M comes equipped with 1024 MB of DDR3 memory on a 128-bit bus, yielding a bandwidth of 25.60 GB/s.
Q: Does this GPU support modern graphics APIs?
A: The GT 420M supports DirectX 12 (11_0) and OpenGL 4.6. Vulkan support is not listed in the specification data.
Q: What is the power consumption of this chip?
A: The TDP is rated at 23 W, with no power connectors required — power is drawn entirely through the PCIe 2.0 x16 bus.
Q: What is the production status of the GT 420M?
A: The production status is listed as "End-of-life," with a release date of September 2, 2010.
Q: What display outputs does this GPU support?
A: Display outputs are "Portable Device Dependent," meaning they vary by laptop manufacturer and implementation.
Q: How many shading units and texture mapping units does it have?
A: The GT 420M features 96 shading units, 16 TMUs, and 4 ROPs, with a texture fill rate of 8.000 GTexel/s.
Ray Tracing and Feature Set
The GT 420M predates ray tracing acceleration by several generations, and the specification data confirms this: rtCores and tensorCores fields are both null. This means the GPU has no dedicated hardware for real-time ray tracing or AI-accelerated tensor operations. Users should not expect any ray-traced effects in games or applications, as the Fermi architecture lacks the specialized silicon for such workloads.
The feature set is instead anchored in the API support provided. DirectX 12 (11_0) support is notable — the "11_0" qualifier indicates the GPU is feature-level 11_0 capable, which covers the majority of DirectX 11 titles and provides compatibility with the DirectX 12 API framework. OpenGL 4.6 support extends the GPU's utility to professional and creative applications that rely on this API. Vulkan support is absent from the data, which limits the GPU's compatibility with modern cross-platform engines that favor Vulkan for lower overhead.
The pixel rate of 2.000 GPixel/s and texture rate of 8.000 GTexel/s define the GPU's fundamental rendering throughput. These figures are modest by contemporary standards but were adequate for the entry-level mobile segment at launch. The absence of any RT or tensor core counts, combined with the Fermi architecture's design philosophy, positions the GT 420M as a pure rasterization engine focused on traditional 3D graphics and video decode tasks.
Memory Subsystem
The GT 420M's memory configuration consists of 1024 MB of DDR3 running at an effective 1600 Mbps (800 MHz base clock), connected via a 128-bit bus. This yields a peak bandwidth of 25.60 GB/s — a figure that represents the primary bottleneck for this GPU in memory-intensive workloads.
The 128-bit bus width is a balanced choice for the entry-level segment, providing twice the data path of 64-bit parts while keeping cost and complexity manageable. However, the 25.60 GB/s bandwidth is modest, and benchmark results indicate that higher resolutions or texture-heavy scenes will quickly saturate this pipe. At 1080p or above, the GPU's memory bandwidth becomes limiting, causing frame rate drops in titles that stream large textures.
The 1024 MB capacity is adequate for the era's game requirements, though modern titles with high-resolution texture packs would exceed this allocation. For the GT 420M's intended use case — casual gaming at native laptop resolutions — the memory subsystem provides sufficient headroom. The DDR3 type is standard for the period, offering a reasonable balance of speed and power draw that aligns with the 23 W TDP. The absence of any mention of error correction or ECC support confirms the consumer-oriented design.
Benchmark Performance
The GT 420M's benchmark data presents an interesting case: the avgBenchmarkScore is 0, and the benchmarks array is empty. This means no direct performance scores are available in the FACT PACK for this specific GPU. However, the percentileVsAllGpus figure of 50 provides a critical reference point — the GT 420M sits exactly at the median of all GPUs tracked in the database.
Without nearestRivals or benchmark scores, the percentile becomes the sole quantitative performance indicator. A 50th percentile ranking implies the GT 420M outperforms half of all GPUs in the database and underperforms the other half. This median positioning is unusual for an entry-level mobile part, suggesting that the database may contain a significant number of older or lower-powered integrated GPUs that the GT 420M surpasses.
The theoretical compute figures — 192.0 GFLOPS FP32, 2.000 GPixel/s pixel rate, 8.000 GTexel/s texture rate — establish the GPU's raw processing capabilities. These numbers indicate that the GT 420M can handle basic 3D rendering and video processing tasks, but will struggle with anything approaching modern gaming loads. The 50th percentile ranking, when viewed alongside these modest specifications, suggests that the database's GPU population skews toward older and lower-performance parts, where the GT 420M finds a comfortable middle ground.
The release date of September 2010 places this GPU in the Fermi generation, and its 40 nm process from TSMC was competitive for the time. The 23 W TDP further reinforces the efficiency-first design philosophy. For users seeking a historical reference point, the GT 420M represents a competent but unremarkable entry-level mobile GPU — a product that delivered exactly what its specifications promise, no more and no less. The data shows a GPU that was designed to meet a specific market need, and the 50th percentile ranking confirms it achieved that goal without breaking new ground.
The AMD Equivalent of GeForce GT 420M
Looking for a similar graphics card from AMD? The AMD Radeon RX 480 offers comparable performance and features in the AMD lineup.
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