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The RX 6600 XT is only a small step up from the RX 5700, about 10-15% faster at 1080p and roughly even at 1440p, with the same 8 GB of VRAM, so for most RX 5700 owners it is a sidegrade that is not worth paying for; the exceptions are players who need hardware ray tracing or DirectX 12 Ultimate support, or who want a shorter, lower-power card for a small case.
That answer surprises people because the RX 6600 XT is a full generation newer and launched at a higher price. The explanation sits in its design: AMD built it as a 1080p card with a narrow memory bus and a small Infinity Cache, and those choices cap how much it can pull ahead of the older, wider RX 5700 once resolution goes up.
MSI Gaming Radeon RX 5700 Boost Clock: 1750 MHz 256-bit 8GB GDDR6 DP/HDMI Dual Torx 3.0 Fans Crossfire Navi AMD Radeon FreeSync Graphics Card (RX 5700 MECH GP OC) (Renewed)
Picked as a relevant option in this category.
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Sapphire Technology Pulse AMD Radeon RX 6600 XT Gaming Graphics Card with 8GB GDDR6, AMD RDNA 2 (11309-03-20G) (Renewed)
Chosen because it specifies AMD RDNA 2 (11309-03-20G) (Renewed).
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ASUS Dual AMD Radeon RX 6600 XT OC Edition 8GB GDDR6 Gaming Graphics Card (AMD RDNA 2, PCIe 4.0, 8GB GDDR6 Memory, HDMI 2.1, DisplayPort 1.4a, Axial-tech Fan Design, 0dB Technology) (Renewed)
Chosen because it specifies PCIe 4.0 and 8GB GDDR6 Memory.
View on AmazonWhere the Two Cards Differ on Paper
| Spec | RX 5700 | RX 6600 XT |
|---|---|---|
| Architecture | RDNA 1.0 | RDNA 2.0 |
| Release date | 7 July 2019 | 30 July 2021 |
| Launch MSRP | $349 | $379 |
| Stream processors | 2304 | 2048 |
| Boost clock | 1725 MHz | 2589 MHz |
| Process | 7 nm | 7 nm |
| TDP | 180 W | 160 W |
| Memory | 8 GB GDDR6 | 8 GB GDDR6 |
| Memory bus | 256-bit | 128-bit |
| Bandwidth | 448.0 GB/s | 256.0 GB/s |
| Cache | 4 MB L2 | 2 MB L2 + 32 MB L3 (Infinity Cache) |
| Interface | PCIe 4.0 x16 | PCIe 4.0 x8 |
| Power connectors | 1x 6-pin + 1x 8-pin | 1x 8-pin |
| Length / width | 268 mm, 2-slot | 190 mm, 2-slot |
| Display outputs | 1x HDMI 2.0b, 3x DisplayPort 1.4a | 1x HDMI, 2x DisplayPort |
The RX 6600 XT has fewer stream processors but runs them about 860 MHz faster. Against that, it has a 128-bit bus and 256 GB/s of bandwidth, a big drop from the RX 5700’s 256-bit bus and 448 GB/s. The 32 MB Infinity Cache covers the gap well at 1080p, where the working set of a frame is smaller, but its hit rate falls as resolution climbs.
Real-World Performance by Resolution
TechPowerUp’s RX 6600 review data shows the RX 6600 XT about 13% ahead of the RX 5700 at 1080p across its game suite. The same outlet noted that the RX 6600 family loses ground at 1440p and 4K because of the small cache. Aggregated benchmark sites tell a similar story: around 9% for the RX 6600 XT at 1080p, close to a tie at 1440p, and the RX 5700 pulling ahead at 4K.
- 1080p: RX 6600 XT roughly 10-15% faster. In a game where the RX 5700 averages around 70 FPS at High, the 6600 XT tends to land around 78-80 FPS; exact numbers vary with settings, CPU and game patch.
- 1440p: effectively a draw, within a few percent either way depending on the game.
- 4K: the RX 5700 can be the faster card thanks to its much higher raw bandwidth, although neither is a 4K card in modern titles.
Neither card escapes the 8 GB VRAM limit. Recent releases at High or Ultra textures can exceed 8 GB even at 1080p, and both cards respond the same way: lower texture settings or accept stutter. A move that does not add memory does not fix the most common modern complaint about the RX 5700.
What You Actually Gain Beyond Frame Rates
The case for the RX 6600 XT rests on features and form factor, not speed.
- Hardware ray tracing and DX12 Ultimate: the RX 5700 lacks both, which locks it out of games that now require ray tracing hardware. The RX 6600 XT can launch and run those games, although its RT performance is limited and works best at 1080p with upscaling.
- Driver-level frame generation: AMD Fluid Motion Frames 2 is supported on RX 6000 and newer, not on RDNA 1.
- Efficiency and size: 160 W instead of 180 W, a single 8-pin connector, and a 190 mm reference length that fits compact cases the RX 5700 cannot.
Upscaling is roughly a wash. Both cards support FSR 3.1 upscaling and FSR 3 frame generation in games that implement it, and neither officially supports FSR 4, which is reserved for RDNA 4. XeSS works on both through its compatibility mode.
The PCIe x8 Catch on Older Motherboards
The RX 6600 XT uses only eight PCIe lanes. On a PCIe 4.0 board that is a non-issue. Many RX 5700 owners, though, run B450, X470 or Intel 9th/10th generation platforms limited to PCIe 3.0, where the 6600 XT gets half the host bandwidth of the RX 5700’s x16 link. The penalty is small when everything fits in VRAM, but when a game spills past 8 GB, data shuttles over that narrower link and the slowdown gets worse. On a PCIe 3.0 system, the already thin 1080p advantage can shrink further in memory-heavy titles.
Cost of the Swap, Worked Out
At launch, the value comparison already favored neither card strongly. Taking the RX 5700 as 100 and the RX 6600 XT as about 113 at 1080p:
- RX 5700: $349 / 100 = $3.49 per performance point.
- RX 6600 XT: $379 / 113 = about $3.35 per performance point at 1080p, and worse than the RX 5700 at 1440p, where performance is roughly equal.
Used, an RX 5700 usually sells for about $100-$140, while an RX 6600 XT commonly goes for $150-$200. Selling one and buying the other typically costs $30-$80 for roughly a 10% gain at 1080p and nothing at 1440p. That money is better pooled toward a card that adds VRAM and a real performance tier, such as a used RX 6700 XT or a new RX 9060 XT 16GB or Arc B580.
PSU and Case Notes
Power is the one area where the RX 6600 XT is easier to live with. Sizing as GPU TDP plus CPU plus about 150 W headroom:
- RX 5700: 180 + 125 + 150 = about 455 W.
- RX 6600 XT: 160 + 125 + 150 = about 435 W, so a quality 450-550 W unit is ample.
The single 8-pin connector simplifies cabling, and the short reference length suits mini-ITX and small micro-ATX cases. Note the reduced display outputs on the reference design: one HDMI and two DisplayPort versus one HDMI and three DisplayPort on the RX 5700, which matters for triple-monitor setups. Partner cards may differ.
Pick-the-Right-Move Table
| If you… | Then |
|---|---|
| Play at 1440p on an RX 5700 | Skip the RX 6600 XT; performance is about the same |
| Play at 1080p and want more FPS | A 10-15% bump is rarely worth a swap; aim higher |
| Need to run ray-tracing-required games | The RX 6600 XT works, but a newer card with more VRAM is a better long-term buy |
| Are building a small-form-factor PC | The 190 mm, single 8-pin RX 6600 XT is a sensible used option |
| Are on a PCIe 3.0 motherboard | Avoid x8 cards with 8 GB if VRAM-heavy games are the priority |
Verdict
Calling the RX 6600 XT an upgrade over the RX 5700 overstates it. It trades a bit of 1080p speed and modern feature support for the same VRAM and no gain at 1440p. Owners who simply want more performance should keep the RX 5700 and save toward a card one class higher, while anyone who must run DX12 Ultimate games or shrink their build has a legitimate reason to choose the RX 6600 XT, ideally bought used at the low end of its price range.
Frequently Asked Questions
Is the RX 6600 XT faster than the RX 5700?
Slightly, at 1080p. TechPowerUp’s data puts it about 13% ahead at that resolution. At 1440p the two are roughly even, and at 4K the RX 5700 can come out ahead because of its wider memory bus.
Is upgrading from the RX 5700 to the RX 6600 XT worth it?
For most people, no. Both cards have 8 GB of VRAM and similar performance at 1440p. The swap only makes sense if hardware ray tracing support, lower power or a much shorter card is the real goal.
Does the RX 6600 XT lose performance on PCIe 3.0?
It runs as PCIe 3.0 x8 on older boards, which halves host bandwidth compared with the RX 5700’s x16 link. The loss is small when games fit in 8 GB, but it grows in titles that overflow VRAM.
Which card is better for ray tracing?
The RX 6600 XT, because the RX 5700 has no ray tracing hardware at all. The 6600 XT’s RT performance is still entry-level, so expect to use 1080p, lighter RT settings and FSR upscaling.
What is a better upgrade from an RX 5700?
Cards that add both performance and VRAM make more sense, such as a used RX 6700 XT or a new RX 9060 XT 16GB or Arc B580. These move the system into a new performance class instead of trading features at the same speed.
