GDDR6X or GDDR5 Graphics Cards? Compared by Specs
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
You are looking at a GDDR6X vs GDDR5 graphics card comparison. Both models deliver gaming performance, but they use different memory technologies. The EVGA RTX 3090 uses GDDR6X with 24GB of memory. The XFX RX 580 uses GDDR5 with 8GB. This difference in memory type and capacity is the main distinction. You need to know how these specs affect your system. We break down the key differences below.
Key differences
| Aspect | EVGA GeForce RTX 3090 24GB | XFX RX 580 GTS XXX 8GB |
|---|---|---|
| Memory Type | GDDR6X | GDDR5 |
| Memory Size | 24GB | 8GB |
| GPU | GeForce RTX 3090 | Radeon RX 580 |
| Interface | PCIe 4.0 | not listed |
| Boost Clock | 1800MHz | 1386MHz |
Which one should you choose?
Choose EVGA GeForce RTX 3090 24GB if
- You need high memory capacity for 4K gaming or content creation.
- You want the latest PCIe 4.0 interface support.
- You prefer higher clock speeds for faster rendering.
Choose XFX RX 580 GTS XXX 8GB if
- You are on a tighter budget for entry-level 1080p gaming.
- You have an older system without PCIe 4.0 support.
- You want a smaller card that fits in compact cases.
Verdict: The EVGA RTX 3090 is for users who need maximum memory and modern interfaces. The XFX RX 580 suits those seeking a reliable option for standard 1080p gaming. Your choice depends on your specific resolution and budget needs.
Specs: GDDR6X vs GDDR5 Cards
Memory Type
The EVGA RTX 3090 uses GDDR6X memory. This newer standard offers higher bandwidth and efficiency compared to older technologies. The XFX RX 580 relies on GDDR5. While GDDR5 is reliable and proven, it lacks the speed potential of GDDR6X. For tasks requiring rapid data access, GDDR6X provides a clear technical advantage. You benefit from faster texture streaming and reduced bottlenecks with the newer memory type. The older GDDR5 remains functional but is outpaced by the modern standard in raw throughput capabilities.
Memory Size
The EVGA RTX 3090 comes equipped with 24GB of video memory. This large capacity allows you to handle high-resolution textures and complex scenes without running out of space. The XFX RX 580 includes 8GB of memory. This amount is sufficient for standard gaming at lower resolutions but may limit performance in demanding modern titles. The significant difference in capacity means the RTX 3090 can manage heavier workloads more effectively. You will find the larger buffer on the EVGA card more future-proof for high-end gaming.
GPU Model
The EVGA card features the GeForce RTX 3090 processor. This is a high-end GPU designed for maximum performance. The XFX card uses the Radeon RX 580. This is an older mid-range processor. The RTX 3090 has significantly more computational power and core count. You will see much higher frame rates and better ray tracing support with the RTX 3090. The RX 580 is a capable card for its era but cannot match the raw power of the newer RTX architecture.
Interface
The EVGA RTX 3090 utilizes a PCIe 4.0 interface. This allows for faster data transfer between the graphics card and the rest of your system. The XFX RX 580 uses a PCIe interface, though the specific generation is not listed in the provided data. Generally, older cards use PCIe 3.0 or earlier. The PCIe 4.0 connection on the RTX 3090 ensures minimal bandwidth limitations. You gain better communication speeds with the newer interface standard compared to the older technology likely used by the RX 580.
Physical Length
The EVGA RTX 3090 measures 11.8 inches in length. This is a large card that requires ample space in your case. The XFX RX 580 is 10.6 inches long. It is slightly more compact. If you have a smaller computer case, the RX 580 might fit more easily. The RTX 3090 demands a larger chassis. You should check your case dimensions before purchasing either card, but the EVGA model is the longer of the two options.
Which graphics card fits your needs
High-end gamers seeking maximum resolution performance
You need the EVGA RTX 3090 for its 24GB GDDR6X memory. This large buffer handles 4K textures without bottlenecks. The 1800MHz boost clock ensures fast frame delivery. PCIe 4.0 support provides the necessary bandwidth for modern titles and creative workloads requiring heavy data throughput.
Budget users wanting reliable 1080p gaming
The XFX RX 580 offers 8GB GDDR5 memory at a lower price point. It delivers solid 1080p performance for standard gaming. The dual BIOS feature allows for easy tuning. Its smaller physical size fits many mid-tower cases, making it a practical choice for building a cost-effective system.
Creators needing extensive video memory capacity
Content creators benefit from the RTX 3090’s 24GB GDDR6X memory. This capacity supports complex 3D renders and large video files. The higher memory bandwidth accelerates data transfer. The RTX architecture also provides optimized drivers for professional applications, ensuring stability and speed during intensive processing tasks.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | EVGA GeForce RTX 3090 24GB | High-end 4K gaming and professional rendering | Check price of EVGA GeForce RTX 3090 24GB on Amazon |
| 2 | XFX RX 580 GTS XXX 8GB | VR-ready gaming with 8GB GDDR5 memory | Check price of XFX RX 580 GTS XXX 8GB on Amazon |
The products compared
EVGA GeForce RTX 3090 24GB
Best for: High-end 4K gaming and professional rendering
- Memory Type
- GDDR6X (what this guide is about)
- Graphics Processor
- GeForce RTX 3090
- Memory Size
- 24GB
- Boost Clock
- 1800MHz
- PCIe Interface
- PCIe 4
- Use
- Gaming
View on Amazon: EVGA GeForce RTX 3090 24GB Affiliate link
This EVGA GeForce RTX 3090 features 24GB of GDDR6X memory and a 1800MHz boost clock. It uses the PCIe 4.0 interface for high bandwidth. The card is large, measuring 11.8 inches long and weighing 2.5 pounds. It suits gamers who need substantial video memory for high-resolution textures and complex rendering tasks in modern titles.
Pros
- 24GB GDDR6X memory capacity
- 1800MHz boost clock speed
- PCIe 4.0 interface support
- Triple fan cooling design
Cons
- Large 11.8-inch length requires spacious cases
- Heavy 2.5-pound build may stress mounting brackets
- High power draw typical of flagship GPUs
Good fit if
- You require 24GB of VRAM for 4K gaming
- You have a large case with strong PCIe slots
- You prioritize maximum memory bandwidth for rendering
Skip if
- You need a compact card for small form factor builds
- You are on a strict budget for entry-level gaming
- You only play esports titles with low VRAM needs
Verdict: EVGA RTX 3090 24GB GDDR6X delivers flagship memory capacity and speed for demanding 4K gaming and professional workloads. It fits users with ample case space and high performance requirements.
XFX RX 580 GTS XXX 8GB
Best for: VR-ready gaming with 8GB GDDR5 memory
- Memory Type
- GDDR5 (what this guide is about)
- Graphics Processor
- Radeon RX 580
- Memory Size
- 8GB
- Boost Clock
- 1386MHz
- Dimensions
- 10.6 × 1.57 × 4.88 inches
- Weight
- 2.7 pounds
View on Amazon: XFX RX 580 GTS XXX 8GB Affiliate link
The XFX Radeon RX 580 GTS XXX Edition uses 8GB of GDDR5 memory on the Polaris architecture. It features a base clock of 1366MHz and an OC+ boost of 1386MHz. The card includes dual BIOS support and Double Dissipation cooling. This setup suits users who need VR-ready performance with a stable, efficient 14nm design for standard gaming tasks.
Pros
- 8GB GDDR5 memory capacity
- 1386MHz OC+ boost clock speed
- Double Dissipation cooling technology
- AMD VR Ready Premium certification
Cons
- Uses older GDDR5 memory instead of GDDR6X
- 10.6-inch length requires spacious cases
- Heavier at 2.7 pounds than lighter cards
Good fit if
- You want 8GB of VRAM for texture-heavy games
- You need VR-ready performance with low latency
- You prefer a card with dual BIOS flexibility
Skip if
- You require the latest GDDR6X memory bandwidth
- You have a small form factor case under 10 inches
- You want the highest possible clock speeds available
Verdict: XFX Radeon RX 580 8GB GDDR5 is a solid choice for gamers who prioritize VR compatibility and ample 8GB memory over newer memory types. It fits users with standard mid-range cases who value stable cooling and factory overclocks.
Specifications side by side
| Spec | EVGA GeForce RTX 3090 24GB | XFX RX 580 GTS XXX 8GB |
|---|---|---|
| Graphics Processor | GeForce RTX 3090 | Radeon RX 580 |
| Memory Size | 24GB | 8GB |
| Memory Type | GDDR6X | GDDR5 |
| Boost Clock | 1800MHz | 1386MHz |
| PCIe Interface | PCIe 4 | not stated |
| Memory | 24GB | 8GB |
| GPU | GeForce RTX 3090 | Radeon RX 580 |
| Interface | PCIe 4.0 | not stated |
| Use | Gaming | not stated |
| Dimensions | 11.8 × 5.38 × 0.1 inches | 10.6 × 1.57 × 4.88 inches |
| Weight | 2.5 pounds | 2.7 pounds |
| Size | not stated | RX 580 |
| Model | not stated | FBA_RX-580P8DFD6-cr |
Frequently asked questions
Is GDDR6X better than GDDR5 for 4K gaming?
Yes, GDDR6X is superior for 4K gaming. It offers higher bandwidth and larger memory capacity. The EVGA RTX 3090 uses GDDR6X with 24GB of memory. This large buffer handles high-resolution textures without bottlenecks. GDDR5, found in cards like the XFX RX 580, has only 8GB. This limits its effectiveness at 4K resolutions compared to the newer standard.
What is the main difference between GDDR6X and GDDR5 memory?
The main difference is speed and capacity. GDDR6X provides higher bandwidth and efficiency. GDDR5 is an older, reliable technology with lower speed potential. GDDR6X supports modern high-performance tasks. GDDR5 is suitable for standard gaming but lacks the throughput needed for demanding workloads. Choose GDDR6X for maximum performance and GDDR5 for budget-friendly stability.
Can I use a GDDR5 card for professional rendering?
GDDR5 cards can handle basic rendering, but GDDR6X is better. The EVGA RTX 3090 with GDDR6X offers 24GB of memory. This capacity is ideal for professional workloads. The XFX RX 580 has only 8GB of GDDR5. This smaller buffer may limit performance in complex professional tasks. GDDR6X provides the necessary resources for heavy rendering jobs.
Does GDDR6X require a specific motherboard slot?
GDDR6X memory type does not dictate the slot. However, the EVGA RTX 3090 uses a PCIe 4.0 interface. This connects to a compatible motherboard slot. The memory type itself is internal to the graphics card. You need a PCIe slot that matches the card's interface requirement. GDDR5 cards often use PCIe 3.0, but both fit standard slots.
How much memory do GDDR6X cards typically have?
GDDR6X cards often feature large memory capacities. The EVGA RTX 3090 includes 24GB of GDDR6X memory. This supports high-end gaming and professional use. GDDR5 cards vary but often have less. The XFX RX 580 has 8GB of GDDR5. GDDR6X models generally offer more VRAM to handle modern high-resolution games and applications efficiently.
Is GDDR5 still relevant for VR gaming?
Yes, GDDR5 remains relevant for VR gaming. The XFX RX 580 uses 8GB of GDDR5 memory. This amount is sufficient for VR-ready performance. It provides stable cooling and factory overclocks. While GDDR6X is faster, GDDR5 delivers solid VR compatibility. It fits users who prioritize VR support over the absolute latest memory technology.