Quick Answer
The Radeon RX 6600 XT and RX 5700 XT are both capable graphics cards from the same manufacturer, built on different architectures. The RX 5700 XT generally offers slightly higher raw performance, while the RX 6600 XT provides significantly better power efficiency and supports newer features like hardware-accelerated ray tracing.
Radeon RX 6600 XT vs Radeon RX 5700 XT: Full Comparison
Introduction
When comparing graphics cards from different generations, the choice often involves weighing raw performance against newer technologies and efficiency. The Radeon RX 5700 XT, a previous-generation flagship, and the Radeon RX 6600 XT, a mid-range offering from a newer generation, present such a scenario. This comparison will break down their specifications, gaming performance, feature sets, and power characteristics to help clarify their respective positions in the current landscape.
Architecture and Specifications
The core difference between these two cards lies in their underlying architecture. The RX 5700 XT is based on the older RDNA 1 architecture, while the RX 6600 XT utilizes the more recent RDNA 2 design. This generational shift brings fundamental changes.
- RX 5700 XT: Built on the 7nm process with RDNA 1. It features 40 Compute Units (CUs) and 2560 stream processors. It typically comes with 8GB of GDDR6 memory on a 256-bit bus.
- RX 6600 XT: Also uses a 7nm process but with the RDNA 2 architecture. It has 32 CUs and 2048 stream processors. It pairs 8GB of GDDR6 memory with a narrower 128-bit bus, but includes a larger 32MB Infinity Cache to help mitigate the bandwidth difference.
While the RX 5700 XT has more raw compute resources, the RDNA 2 architecture in the 6600 XT is more efficient per clock, includes dedicated ray accelerators, and supports advanced features like DirectX 12 Ultimate.
Gaming Performance
In traditional rasterization performance (non-ray traced games), the two cards are often close, with the outcome depending on the game and resolution.
- At 1080p: The RX 6600 XT is highly competitive and can sometimes match or slightly exceed the RX 5700 XT, especially in titles that leverage the newer architecture’s efficiencies.
- At 1440p: The RX 5700 XT’s wider memory bus often gives it a slight advantage in this resolution, as higher resolutions are more demanding on memory bandwidth. Its performance lead can become more noticeable here.
- Ray Tracing: The RX 6600 XT holds a clear advantage due to its dedicated hardware for ray tracing (Ray Accelerators). While ray tracing performance is not its primary strength compared to some competitors, it is a functional feature that the RX 5700 XT lacks entirely.
Power Efficiency and Thermals
This is one of the most significant areas of differentiation. The RDNA 2 architecture provides a substantial leap in performance-per-watt.
- RX 6600 XT: Has a typical board power (TBP) of around 160W. It is known for running relatively cool and quiet, making it suitable for smaller form-factor cases.
- RX 5700 XT: Has a higher TBP, generally around 225W. It can consume significantly more power under load and often requires more robust cooling solutions, which can affect noise levels.
The RX 6600 XT’s superior efficiency translates to lower heat output and potentially lower electricity costs over time.
Feature Set and Technologies
The newer generation card supports a more modern suite of features.
- DirectX 12 Ultimate: The RX 6600 XT supports this API, which includes features like Mesh Shaders and Variable Rate Shading (VRS). The RX 5700 XT does not have full support.
- Smart Access Memory (SAM) / Resizable BAR: Both cards can support this feature when paired with a compatible CPU and motherboard, which can provide a performance boost in some games by allowing the CPU full access to the GPU’s memory.
- AV1 Decode: The RX 6600 XT includes hardware decoding for the modern AV1 video codec, which is becoming more common for streaming. The RX 5700 XT lacks this.
Comparison Table
| Feature | Radeon RX 6600 XT | Radeon RX 5700 XT |
|---|---|---|
| Architecture | RDNA 2 | RDNA 1 |
| Process Node | 7nm | 7nm |
| Stream Processors | 2048 | 2560 |
| Game Clock | Typically ~2359 MHz | Typically ~1755 MHz |
| VRAM | 8GB GDDR6 | 8GB GDDR6 |
| Memory Bus | 128-bit | 256-bit |
| Infinity Cache | 32MB | N/A |
| Ray Tracing | Yes (Ray Accelerators) | No |
| Typical Board Power (TBP) | ~160W | ~225W |
| PCIe Interface | PCIe 4.0 x8 | PCIe 4.0 x16 |
| Key Features | DirectX 12 Ultimate, AV1 Decode, SAM | DirectX 12, SAM (with update) |
Frequently Asked Questions (FAQ)
Which card is faster, the RX 6600 XT or RX 5700 XT?
In many games at 1080p, their performance is quite similar. At 1440p, the RX 5700 XT often holds a slight performance advantage due to its higher memory bandwidth. However, the RX 6600 XT is significantly faster in any workload involving ray tracing.
Does the RX 5700 XT support ray tracing?
No, the RX 5700 XT is based on the RDNA 1 architecture, which does not include dedicated hardware for real-time ray tracing. Ray tracing effects can only be handled via slower software emulation on this card.
Why does the RX 6600 XT have a smaller memory bus?
The RX 6600 XT uses a large 32MB Infinity Cache on the GPU die. This cache acts as a high-speed buffer, dramatically reducing the need to fetch data from the slower VRAM, which helps compensate for the narrower 128-bit bus, especially at 1080p resolution.
Which graphics card consumes less power?
The Radeon RX 6600 XT is notably more power-efficient, with a typical board power around 160W compared to the RX 5700 XT’s 225W. This generally results in lower heat output and quieter operation.
Final Thoughts
The choice between the Radeon RX 6600 XT and the RX 5700 XT illustrates a common trade-off between generations. The RX 5700 XT remains a competent performer, particularly for 1440p gaming without ray tracing. The RX 6600 XT, while sometimes slightly behind in pure rasterization at higher resolutions, brings substantial benefits in power efficiency, thermals, and support for modern features like hardware-accelerated ray tracing and AV1 decoding. The decision often hinges on whether raw performance in older titles or future-ready features and efficiency in a newer architecture is the higher priority for a user’s specific needs.