NVIDIA GeForce GTX 645 OEM
NVIDIA graphics card specifications and benchmark scores
At a Glance
NVIDIANVIDIA GeForce GTX 645 OEM Specifications
GeForce GTX 645 OEM GPU Core
Shader units and compute resources
The NVIDIA GeForce GTX 645 OEM 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.
GTX 645 OEM Clock Speeds
GPU and memory frequencies
Clock speeds directly impact the GeForce GTX 645 OEM'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 GTX 645 OEM by NVIDIA dynamically adjusts frequencies based on workload, temperature, and power limits to maximize performance while maintaining stability.
NVIDIA's GeForce GTX 645 OEM Memory
VRAM capacity and bandwidth
VRAM (Video RAM) is dedicated memory for storing textures, frame buffers, and shader data. The GeForce GTX 645 OEM'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 GTX 645 OEM by NVIDIA Cache
On-chip cache hierarchy
On-chip cache provides ultra-fast data access for the GTX 645 OEM, 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.
GTX 645 OEM Theoretical Performance
Compute and fill rates
Theoretical performance metrics provide a baseline for comparing the NVIDIA GeForce GTX 645 OEM 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.
Kepler Architecture & Process
Manufacturing and design details
The NVIDIA GeForce GTX 645 OEM is built on NVIDIA's Kepler 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 GTX 645 OEM will perform in GPU benchmarks compared to previous generations.
NVIDIA's GeForce GTX 645 OEM Power & Thermal
TDP and power requirements
Power specifications for the NVIDIA GeForce GTX 645 OEM 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 GTX 645 OEM to maintain boost clocks without throttling.
GeForce GTX 645 OEM by NVIDIA Physical & Connectivity
Dimensions and outputs
Physical dimensions of the NVIDIA GeForce GTX 645 OEM 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 GTX 645 OEM. 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 GTX 645 OEM Product Information
Release and pricing details
The NVIDIA GeForce GTX 645 OEM 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 GTX 645 OEM by NVIDIA represents good value at current market prices. Predecessor and successor information aids in tracking generational improvements and planning future upgrades.
GeForce GTX 645 OEM Benchmark Scores
No benchmark data available for this GPU.
About NVIDIA GeForce GTX 645 OEM
The NVIDIA GeForce GTX 645 OEM is a Kepler-architecture graphics card manufactured by NVIDIA, built on TSMC's 28 nm process. It integrates 2,540 million transistors on a 221 mm² die, yielding a transistor density of 11.5 million per mm². The card was released on April 21, 2013, and is now end-of-life. It belongs to the GeForce 600 generation, sitting between the GeForce 500 and GeForce 700 series. As an OEM part, it was designed for pre-built systems, and its specifications reflect a low-power, mainstream orientation.
Memory Subsystem
The GTX 645 OEM is equipped with 1024 MB of GDDR5 memory, connected via a 128-bit bus. The memory clock runs at 1000 MHz, producing an effective data rate of 4 Gbps. This configuration yields a memory bandwidth of 64.00 GB/s. For a card of its class, this bandwidth is moderate, and the 1 GB frame buffer is a limiting factor at high resolutions. When textures and anti-aliasing demand more than 1 GB of video memory, the card will resort to system memory or cause texture thrashing, which can result in stuttering and reduced frame rates. The 128-bit bus width further constrains memory throughput; even if the capacity were larger, the narrow interface would bottleneck the transfer of high-resolution texture data. The pixel rate of 9.888 GPixel/s and texture rate of 39.55 GTexel/s depend on the memory subsystem to feed them; in memory-intensive scenarios, these theoretical rates will not be sustained. For standard high-definition gaming with modest settings, the memory subsystem is adequate, but it is not designed for ultra-high resolutions or high-fidelity texture packs.
Who Should Consider It
Based on its percentile rank of 50 among all GPUs, the GTX 645 OEM sits exactly at the median of the performance distribution. This places it as a mainstream part, suitable for entry-level to mid-range gaming. Users who play older titles, esports games, or less demanding indie titles will find it serviceable at standard high-definition resolutions with reduced graphical settings. The card's 1024 MB memory capacity and 64 GB/s bandwidth are sufficient for such workloads. However, modern AAA games with large texture sets will likely exceed the frame buffer, forcing the user to lower resolution or texture quality. The card's low 65 W TDP and single-slot design make it an easy drop-in for compact or OEM systems with limited power and space. It is not intended for high-refresh-rate or ultra-high-resolution gaming; those use cases require a more capable GPU. Given its end-of-life status, the card is only available on the used market or in legacy pre-built systems.
How It Compares
The FACT PACK provides no nearestRivals data for this card, so a direct comparative analysis against specific competing models is not possible from the available information. The card's predecessor is the GeForce 500 series, and its successor is the GeForce 700 series, placing it in the middle of NVIDIA's product stack at the time. Without benchmark scores from rivals, we cannot state percentage differences or performance deltas. The card's own theoretical performance metrics—949.2 GFLOPS of FP32 compute, 39.55 GTexel/s texture fill, and 9.888 GPixel/s pixel fill—can be used as reference points, but no rival numbers are available for context. The percentile rank of 50 indicates that it is exactly average relative to all GPUs in the database, but this does not provide a direct comparison to any specific model. As an OEM part, it may have been sold in pre-built systems, and its performance relative to retail cards is not documented in this dataset.
FAQ
Q: What is the memory size and type of the GTX 645 OEM?
A: It has 1024 MB of GDDR5 memory.
Q: What is the memory bus width and bandwidth?
A: The bus width is 128 bit, and the bandwidth is 64.00 GB/s.
Q: Does the card require external power connectors?
A: No, it uses no power connectors; it draws power entirely from the PCIe slot.
Q: What is the suggested power supply wattage?
A: The suggested PSU is 250 W.
Q: What display outputs are available?
A: It has 1x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2.
Q: What is the process node and transistor count?
A: The process node is 28 nm, and it contains 2,540 million transistors.
Q: What is the TDP of the card?
A: The TDP is 65 W.
Benchmark Performance
The GTX 645 OEM does not have any recorded benchmark scores in the FACT PACK; its average benchmark score is listed as 0. However, its percentile rank among all GPUs is 50, meaning it falls exactly at the median of the distribution. This percentile is based on the database's overall performance ranking, which likely incorporates various benchmark results. The card's theoretical compute capabilities are as follows: FP32 (single-precision) performance is 949.2 GFLOPS. Its pixel fill rate is 9.888 GPixel/s, and its texture fill rate is 39.55 GTexel/s. These numbers indicate a modest level of throughput that aligns with its mid-pack percentile. The card has 576 shading units, 48 texture mapping units (TMUs), and 16 render output units (ROPs). These resource counts directly influence the fill rates and compute throughput. For instance, the pixel rate is determined by the ROP count and the operating clock, while the texture rate is a product of TMUs and clock speed; the exact clock is not listed, but the rates are provided. The 28 nm process and 2,540 million transistors suggest a moderate chip size; the die measures 221 mm². The transistor density of 11.5 million per mm² is typical for the Kepler generation. The card's API support includes DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175, which are adequate for many applications. Overall, the benchmark performance, as inferred from the percentile and theoretical rates, positions the GTX 645 OEM as a competent entry-level card for its time, but it is not competitive with modern GPUs.
Power and Cooling
The GTX 645 OEM has a TDP of 65 W, which is quite low. This allows for a single-slot cooling solution, as indicated by its slot width. The card does not require any external power connectors, meaning it draws all its power from the PCIe 3.0 x16 slot. The suggested PSU rating is 250 W, which is very modest and compatible with most standard power supplies. The card's physical length is 147 mm (5.8 inches), making it suitable for compact cases. The low power consumption and lack of power connectors simplify installation in OEM systems that may have limited PSU capacity. The card's architecture is Kepler, fabricated on a 28 nm process at TSMC, with a transistor count of 2,540 million. The die size is 221 mm². The cooling solution is not detailed in the FACT PACK, but the single-slot design implies a low-profile heatsink and fan. Given the 65 W TDP, a simple aluminum heatsink with a small fan is likely sufficient. The card supports PCIe 3.0 x16, ensuring compatibility with modern motherboards. The display outputs include DVI, HDMI 1.4a, and DisplayPort 1.2, covering common monitor connections. The card's API support includes DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175, which are adequate for many applications. Overall, the power and cooling requirements are minimal, making this an easy card to integrate into a system without additional power cabling.
The AMD Equivalent of GeForce GTX 645 OEM
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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