GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
AMD Radeon RX 6600
291%
291%
AMD Radeon HD 6990
38%
38%
AMD Radeon RX 6600 is approximately 253% faster
Technical Specifications
| Specification | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| Graphics ProcessorDifferent | Navi 23 | Antilles x2 |
| CoresDifferent | 1792 | 1536 x2 |
| TMUsDifferent | 112 | 96 x2 |
| ROPsDifferent | 64 | 32 x2 |
| Memory SizeDifferent | 8 GB | 2 GB x2 |
| Memory TypeDifferent | GDDR6 | GDDR5 |
| Bus WidthDifferent | 128 bit | 256 bit x2 |
Graphics Processor
| Feature | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| GPU NameDifferent | Navi 23 | Antilles |
| GPU VariantDifferent | Navi 23 XL(215-130000016) | Antilles XT(215-0807027) |
| ArchitectureDifferent | RDNA 2.0 | TeraScale 3 |
| Foundry | TSMC | TSMC |
| Process SizeDifferent | 7 nm | 40 nm |
| TransistorsDifferent | 11,060 million | 2,640 million |
| DensityDifferent | 46.7M / mm² | 6.8M / mm² |
| Die SizeDifferent | 237 mm² | 389 mm² |
| Chip PackageDifferent | BGA-1269 | N/A |
Graphics Card
| Feature | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| Release DateDifferent | Oct 13th, 2021 | Mar 8th, 2011 |
| GenerationDifferent | Navi II(RX 6000) | Northern Islands(HD 6900) |
| PredecessorDifferent | Navi | Evergreen |
| SuccessorDifferent | Navi III | Southern Islands |
| ProductionDifferent | Active | End-of-life |
| Launch PriceDifferent | 329 USD | 699 USD |
| Current PriceDifferent | Amazon/Newegg | N/A |
| Bus InterfaceDifferent | PCIe 4.0 x8 | PCIe 2.0 x16 |
| ReviewsDifferent | 21 in our database | 47 in our database |
Clock Speeds
| Feature | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| Base ClockDifferent | 1626 MHz | N/A |
| Game ClockDifferent | 2044 MHz | N/A |
| Boost ClockDifferent | 2491 MHz | N/A |
| Memory ClockDifferent | 1750 MHz14 Gbps effective | 1250 MHz5 Gbps effective |
| GPU ClockDifferent | N/A | 830 MHz |
Memory
| Feature | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| Memory SizeDifferent | 8 GB | 2 GB |
| Memory TypeDifferent | GDDR6 | GDDR5 |
| Memory BusDifferent | 128 bit | 256 bit |
| BandwidthDifferent | 224.0 GB/s | 160.0 GB/s |
Render Config
| Feature | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| Shading UnitsDifferent | 1792 | 1536 |
| TMUsDifferent | 112 | 96 |
| ROPsDifferent | 64 | 32 |
| Compute UnitsDifferent | 28 | 24 |
| RT CoresDifferent | 28 | N/A |
| L0 CacheDifferent | 32 KB per WGP | N/A |
| L1 CacheDifferent | 128 KB per Array | 8 KB (per CU) |
| L2 CacheDifferent | 2 MB | 512 KB |
| L3 CacheDifferent | 32 MB | N/A |
Theoretical Performance
| Feature | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| Pixel RateDifferent | 159.4 GPixel/s | 26.56 GPixel/s |
| Texture RateDifferent | 279.0 GTexel/s | 79.68 GTexel/s |
| FP16 (half)Different | 17.86 TFLOPS (2:1) | N/A |
| FP32 (float)Different | 8.928 TFLOPS | 2.550 TFLOPS |
| FP64 (double)Different | 558.0 GFLOPS (1:16) | 637.4 GFLOPS (1:4) |
Board Design
| Feature | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| Slot Width | Dual-slot | Dual-slot |
| LengthDifferent | 190 mm7.5 inches | 310 mm12.2 inches |
| HeightDifferent | 110 mm4.3 inches | 115 mm4.5 inches |
| Width | 40 mm1.6 inches | 40 mm1.6 inches |
| TDPDifferent | 132 W | 375 W |
| Suggested PSUDifferent | 300 W | 750 W |
| OutputsDifferent | 1x HDMI 2.13x DisplayPort 1.4a | 1x DVI4x mini-DisplayPort 1.2 |
| Power ConnectorsDifferent | 1x 8-pin | 2x 8-pin |
| Board NumberDifferent | D532 | 109-C20647-00 |
Graphics Features
| Feature | AMD Radeon RX 6600 | AMD Radeon HD 6990 |
|---|---|---|
| DirectXDifferent | 12 Ultimate (12_2) | 11.2 (11_0) |
| OpenGLDifferent | 4.6 | 4.4 |
| OpenCLDifferent | 2.1 | 1.2 |
| VulkanDifferent | 1.3 | N/A |
| Shader ModelDifferent | 6.8 | 5.0 |
Comparison Summary
7
Specifications Compared
8
Feature Categories
55
Detailed Features
More Comparisons with AMD Radeon RX 6600
Compare AMD Radeon RX 6600 with other GPUs of similar performance
AMD Radeon RX 6600 vs GeForce RTX 2070 SUPER
GeForce RTX 2070 SUPER Performance118%
GeForce RTX 2070 SUPER is 18% faster than AMD Radeon RX 6600
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AMD Radeon RX 6600 vs GeForce GTX 1080 Ti
GeForce GTX 1080 Ti Performance117%
GeForce GTX 1080 Ti is 17% faster than AMD Radeon RX 6600
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AMD Radeon RX 6600 vs Arc A770
Arc A770 Performance117%
Arc A770 is 17% faster than AMD Radeon RX 6600
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AMD Radeon RX 6600 vs GeForce RTX 3060 12 GB
GeForce RTX 3060 12 GB Performance113%
GeForce RTX 3060 12 GB is 13% faster than AMD Radeon RX 6600
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AMD Radeon RX 6600 vs Radeon RX 6600 XT
Radeon RX 6600 XT Performance111%
Radeon RX 6600 XT is 11% faster than AMD Radeon RX 6600
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AMD Radeon RX 6600 vs Radeon VII
Radeon VII Performance111%
Radeon VII is 11% faster than AMD Radeon RX 6600
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More Comparisons with AMD Radeon HD 6990
Compare AMD Radeon HD 6990 with other GPUs of similar performance
AMD Radeon HD 6990 vs GeForce GTX 1650
GeForce GTX 1650 Performance119%
GeForce GTX 1650 is 19% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Radeon RX 6400
Radeon RX 6400 Performance117%
Radeon RX 6400 is 17% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Arc A380
Arc A380 Performance115%
Arc A380 is 15% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs GeForce GTX 780
GeForce GTX 780 Performance115%
GeForce GTX 780 is 15% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Radeon HD 7970 GHz Edition
Radeon HD 7970 GHz Edition Performance104%
Radeon HD 7970 GHz Edition is 4% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs GeForce GTX 590
GeForce GTX 590 Performance104%
GeForce GTX 590 is 4% faster than AMD Radeon HD 6990
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