Radeon RX 6600
AMDconsumer| Overview | |
|---|---|
| Architecture | RDNA 2 (2021) |
| Launch date | 2021-10-13 |
| Transistor count | 11.1B |
| GPU target (gfx) | gfx1032 |
| Memory | |
| VRAM | 8 GB GDDR6 |
| Memory bandwidth | 224 GB/s |
| Cache | 32 MB |
| Compute — vector | |
| FP32 | 8.93 TFLOPS |
| FP16 | 17.86 TFLOPS |
| Cores & clocks | |
| Compute Units | 28 |
| Shader cores | 1,792 |
| Peak clock | 2,491 MHz |
| Board & system | |
| TDP | 132 W |
| Interconnect | PCIe only (no Infinity Fabric multi-GPU link) |
Compatible ROCm versions
none — no ROCm release has ever listed gfx1032 as a supported GPU target (gfx). ROCm support is granted per target, so this card is not covered by any version, including the current one. The unofficial HSA_OVERRIDE_GFX_VERSION workaround is the usual route people take — see ROCm on consumer Radeon GPUs for what it does and where it breaks.
Deliberately included as an *unsupported* card, same reasoning as the RX 6700 XT. This is Navi 23 = gfx1032, which appears in no ROCm release's supported-target list in this collection. It is a very widely owned budget card, so "does ROCm work on my 6600?" is a common question with a firm answer: not officially, ever. The community route is HSA_OVERRIDE_GFX_VERSION=10.3.0 (borrowing gfx1030's ABI from the same RDNA 2 family) — unofficial, self-managed, and not reflected in this site's compatibility data. Note also that 8 GB of VRAM is the binding constraint for local LLM work regardless of ROCm status; run it through /vram-calculator/ before planning around it.
fp16TFLOPS and fp8TFLOPS intentionally omitted — RDNA 2 has no matrix/AI-accelerator cores; AMD's page lists only "Peak Half Precision (FP16 Vector) Performance: 17.86 TFLOPs" (captured as fp16TFLOPSVector) with no "AI Accelerators" count, so matrixCoreCount is omitted too.
peakClockMHz uses the published Boost Frequency ("Up to 2491 MHz"), not the 2044 MHz Game Frequency. No PCIe "Bus Type" line is published on 6000-series pages, so pcieGen is left unset (this card is commonly reported as a PCIe 4.0 x8 part, but AMD does not state a bus width on the spec page, so nothing is recorded here). AMD publishes no MSRP on this page, so msrpUSD is omitted. Source: amd.com/en/products/graphics/desktops/radeon/6000-series/amd-radeon-rx-6600.html ("Expand All" spec accordion), pulled 2026-09-20.