GPU

Matrox Parhelia 256 MB

Unknown graphics card specifications and benchmark scores

256 MB
VRAM
MHz Boost
TDP
256
Bus Width

Matrox Parhelia 256 MB Specifications

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Matrox Parhelia 256 MB GPU Core

Shader units and compute resources

The Matrox Parhelia 256 MB 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.

TMUs
16
ROPs
4
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Matrox Parhelia 256 MB Clock Speeds

GPU and memory frequencies

Clock speeds directly impact the Matrox Parhelia 256 MB'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 Matrox Parhelia 256 MB by Unknown dynamically adjusts frequencies based on workload, temperature, and power limits to maximize performance while maintaining stability.

GPU Clock
200 MHz
Memory Clock
250 MHz 500 Mbps effective
GDDR GDDR 6X 6X

Unknown's Matrox Parhelia 256 MB Memory

VRAM capacity and bandwidth

VRAM (Video RAM) is dedicated memory for storing textures, frame buffers, and shader data. The Matrox Parhelia 256 MB'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.

Memory Size
256 MB
VRAM
256 MB
Memory Type
DDR
VRAM Type
DDR
Memory Bus
256 bit
Bus Width
256-bit
Bandwidth
16.00 GB/s
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Matrox Parhelia 256 MB Theoretical Performance

Compute and fill rates

Theoretical performance metrics provide a baseline for comparing the Matrox Parhelia 256 MB 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.

Pixel Rate
800.0 MPixel/s
Texture Rate
3.200 GTexel/s
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Parhelia Architecture & Process

Manufacturing and design details

The Matrox Parhelia 256 MB is built on Unknown's Parhelia 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 Matrox Parhelia 256 MB will perform in GPU benchmarks compared to previous generations.

Architecture
Parhelia
GPU Name
Parhelia-512
Process Node
150 nm
Foundry
UMC
Transistors
80 million
Die Size
174 mm²
Density
459.8K / mm²
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Unknown's Matrox Parhelia 256 MB Power & Thermal

TDP and power requirements

Power specifications for the Matrox Parhelia 256 MB 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 Matrox Parhelia 256 MB to maintain boost clocks without throttling.

Power Connectors
None
Suggested PSU
200 W
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Matrox Parhelia 256 MB by Unknown Physical & Connectivity

Dimensions and outputs

Physical dimensions of the Matrox Parhelia 256 MB 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.

Slot Width
Single-slot
Length
175 mm 6.9 inches
Bus Interface
AGP 4x
Display Outputs
2x DVI
Display Outputs
2x DVI
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Unknown API Support

Graphics and compute APIs

API support determines which games and applications can fully utilize the Matrox Parhelia 256 MB. 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.

DirectX
8.1
DirectX
8.1
OpenGL
1.3
OpenGL
1.3
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Matrox Parhelia 256 MB Product Information

Release and pricing details

The Matrox Parhelia 256 MB is manufactured by Unknown 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 Matrox Parhelia 256 MB by Unknown represents good value at current market prices. Predecessor and successor information aids in tracking generational improvements and planning future upgrades.

Manufacturer
Unknown
Release Date
Jun 2002
Production
End-of-life

Matrox Parhelia 256 MB Benchmark Scores

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No benchmark data available for this GPU.

About Matrox Parhelia 256 MB

Considering the Matrox Parhelia 256 MB today requires a hard look at its value proposition. With its unique 256 MB of DDR memory on a 150 nm process, it was a technical marvel upon its 2002 release. Yet, its cost analysis is tricky against period competitors like the ATI Radeon 9700 Pro, which offered superior performance in most 3D gaming scenarios. The AGP 4x interface of the Matrox Parhelia 256 MB feels inherently limiting for any modern system retrofit. So, are you paying for a collector's piece or genuine, usable legacy performance? The price must be exceptionally low to justify its niche as a secondary display card or for specific multi-monitor tasks.

Future-proofing was never this card's strong suit, and its competitive alternatives have only aged more gracefully. Pairing suggestions are equally challenging; you'd need an older AGP platform running Windows XP to even approach its driver support. The architectural focus of the Matrox Parhelia 256 MB on image quality and multi-display support over raw speed narrows its appeal significantly. Could it serve a purpose in a retro build focused on 2D precision or triple-head setups of the era? Perhaps, but for period-accurate gaming, other options simply deliver more frames. Ultimately, acquiring the Matrox Parhelia 256 MB is a deliberate choice for hardware historians, not performance seekers.

The NVIDIA Equivalent of Matrox Parhelia 256 MB

Looking for a similar graphics card from NVIDIA? The NVIDIA GeForce GTX 260 offers comparable performance and features in the NVIDIA lineup.

NVIDIA GeForce GTX 260

NVIDIA • 896 MB VRAM

View Specs Compare

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