Xilinx Kintex-7 vs Artix-7: Cost vs Performance Comparison
Xilinx Kintex-7 vs Artix-7: Cost vs Performance Comparison
When designing with Xilinx 7-series FPGAs, the choice between Kintex-7 and Artix-7 families comes down to one question: how much performance do you actually need — and what is your budget? Both families use the same 28nm process node and share the same development toolchain (Vivado), but they target fundamentally different design tiers. This guide breaks down the key differences so you can match the right FPGA to your application.
Architecture Overview
The Artix-7 family is Xilinx's cost-optimized line, designed for high-volume applications where price-per-logic-cell matters most. Kintex-7 sits one tier up, balancing price with significantly higher logic density, more DSP slices, and integrated high-speed transceivers. On paper, Kintex-7 offers roughly 2× to 3× the logic capacity of the largest Artix-7 devices, but the real differentiator is in the I/O bandwidth and signal processing capabilities.
Key Specifications Head-to-Head
| Parameter | Artix-7 (XC7A200T) | Kintex-7 (XC7K325T) |
|---|---|---|
| Logic Cells | 215,360 | 326,080 |
| DSP Slices | 740 | 840 |
| Block RAM | 13 Mb | 16 Mb |
| GTX Transceivers | 16 (up to 6.6 Gb/s) | 16 (up to 12.5 Gb/s) |
| Max I/O Pins | 500 | 500 |
| PCIe Gen2 Blocks | 1 | 1 |
| Typical Unit Price (100+ qty) | $75–$150 | $180–$400 |
When to Choose Which
Choose Artix-7 when: Your design is I/O-bound rather than compute-bound, you need DDR3/LVDS interfaces but not multi-gigabit serial links, or your unit cost target is under $100. Common in industrial cameras, motor controllers, software-defined radios, and portable test equipment.
Choose Kintex-7 when: You need 10G+ serial connectivity (SFP+, PCIe Gen2/Gen3 bridging), heavy DSP pipelines for video or signal processing, or you're prototyping before migrating to UltraScale. Typical applications include broadcast video processing, medical imaging, wireless infrastructure, and high-speed data acquisition.
Watch out for obsolescence: Select 7-series SKUs are moving to "mature" status. Always verify lead times before committing to a specific part number — Kintex-7 devices in larger packages tend to have longer availability than niche Artix-7 packages.
Sourcing Strategy
Both families are widely available across franchise and independent distribution channels. Artix-7 devices benefit from high-volume pricing and are frequently stocked in Asian spot markets. Kintex-7 parts have tighter supply — especially the larger XC7K410T and XC7K480T — and may require 8–16 week lead times through authorized distributors. For production builds, locking in allocation 12 weeks ahead is the safest approach. For prototype and low-volume orders, excess stock from verified independent distributors often provides faster turnaround at competitive prices.
The right choice ultimately depends on your design's throughput requirements and cost sensitivity. If you can achieve your target performance within Artix-7's envelope, you save on BOM cost. But if you need the transceiver bandwidth and DSP headroom that only Kintex-7 provides, the price premium pays for itself in a single board spin.
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