XC7K420T vs XCKU040
A comparison of the AMD Kintex-7 XC7K420T and the AMD Kintex UltraScale XCKU040 using the data from both vendors' selection guides.
Side-by-side specifications
| XC7K420T | XCKU040 | |
|---|---|---|
| Vendor / family | AMD Kintex-7 | AMD Kintex UltraScale |
| LUTs as published | 260,600 LUT6 | 242,400 LUT6 |
| LUT type | 6-input look-up table, fracturable into two LUT5 with shared inputs | 6-input look-up table, fracturable into two LUT5 with shared inputs |
| LUT4 equivalent (approx.) | ≈416,960 | ≈387,840 |
| CoreScore (SERV cores) | 1,276 | 1,024 |
| Vendor logic figure | 416,960 LC | 530,000 SLC |
| DSP | 1,680 DSP slices | 1,920 DSP slices |
| Block RAM | 29.4 Mb | 21.1 Mb |
| Large RAM | — | — |
| Max. user I/O | 400 | 520 |
| Transceivers | 32 × GTX 12.5 Gb/s | 20 × GTH/GTY 16.3 Gb/s |
| Hard PCI Express | Gen2 | Gen3 |
| Hard processor | None | None |
| Process | 28 nm | 20 nm |
| Configuration memory | SRAM | SRAM |
| Packages | 2 | 4 |
| Design tool | AMD Vivado | AMD Vivado |
Highlighted values are higher. LUT counts are shown as published; the LUT4 equivalent is an approximation to compare different LUT types, see how FPGA vendors count logic. Add up to two more devices to this comparison.
Key differences
The XC7K420T has about 8% more logic capacity (417K vs 388K LUT4 equivalents).
For arithmetic, the XCKU040 has 1,920 DSP slices against 1,680 DSP slices on the XC7K420T.
The XC7K420T has more on-chip memory (29.4 Mb vs 21.1 Mb).
Both have transceivers: 32 at up to 12.5 Gb/s on the XC7K420T and 20 at up to 16.3 Gb/s on the XCKU040.
In the CoreScore benchmark the XC7K420T fits 1,276 SERV cores and the XCKU040 fits 1,024.
The XC7K420T is designed with AMD Vivado and the XCKU040 with AMD Vivado.
Full specifications
See the complete spec sheets with packages and grades: XC7K420T (Kintex-7) and XCKU040 (Kintex UltraScale).