DDR4 vs DDR5: Which RAM Should You Buy?
Updated for 2026 with real UK pricing data
Choosing between DDR4 and DDR5 RAM is one of the most common decisions when building or upgrading a PC in 2026. DDR5 offers higher speeds and bandwidth, while DDR4 remains more affordable per gigabyte. This guide compares both generations using real pricing data to help you decide which is right for your needs.
DDR4 vs DDR5 at a Glance
| Specification | DDR4 | DDR5 |
|---|---|---|
| Speed Range | 2400-3200MHz | 4800-7600MHz |
| Voltage | 1.2V | 1.1V |
| Max Module Size | 32GB | 128GB |
| Channels per Module | 1 (64-bit) | 2 (32-bit each) |
| On-Die ECC | No | Yes |
| Cheapest per GB | £6.22 | £7.14 |
| Average per GB | £7.79 | £15.39 |
| Platform Support | Intel 6th-12th Gen, AMD Ryzen 1000-5000 | Intel 12th Gen+, AMD Ryzen 7000+ |
32GB Kit Price Comparison
The most popular capacity for gamers and creators. Here's how DDR4 and DDR5 compare for a 32GB kit:
Performance: DDR4 vs DDR5
DDR5 offers significantly higher memory bandwidth than DDR4, which translates into better performance in bandwidth-hungry applications. However, the real-world impact varies by workload:
Gaming
DDR5 at 5600MHz+ typically gives a 5-15% FPS improvement over DDR4-3600 in CPU-bound gaming scenarios (1080p, competitive titles). At 4K resolution where the GPU is the bottleneck, the difference shrinks to 2-5%. For most gamers, either generation provides a good experience.
Content Creation & Productivity
Video editing, 3D rendering, and large dataset processing benefit more from DDR5's higher bandwidth. Applications like Adobe Premiere, DaVinci Resolve, and Blender can see 10-25% improvements with DDR5, especially with large projects.
Everyday Tasks
For web browsing, office work, and general computing, the difference between DDR4 and DDR5 is negligible. Both generations handle everyday tasks comfortably. Your money is better spent on storage or a better CPU if these are your primary use cases.
Compatibility: What Does Your System Support?
DDR4 and DDR5 are not interchangeable. Your motherboard determines which type you can use:
DDR4 Platforms
- Intel 6th Gen (Skylake) to 12th Gen (Alder Lake)*
- AMD Ryzen 1000 to 5000 series
- AMD Ryzen 7000 (X670E boards with DDR4 variant)*
*Some 12th Gen boards support DDR4 or DDR5 (not both)
DDR5 Platforms
- Intel 12th Gen (Alder Lake) and newer
- Intel 13th Gen (Raptor Lake)
- Intel 14th Gen (Raptor Lake Refresh)
- AMD Ryzen 7000 series and newer
- AMD Ryzen 9000 series
The Verdict: DDR4 or DDR5 in 2026?
Buy DDR4 if...
- You're upgrading an existing DDR4 system
- You're on a tight budget and want the most RAM per pound
- You're building a budget PC with an older-gen platform
- You primarily use your PC for everyday tasks and light gaming
Buy DDR5 if...
- You're building a new system from scratch
- You want the best possible gaming performance
- You do content creation, video editing, or 3D rendering
- You want future-proofing (DDR4 is end of life)
- You're on Intel 13th/14th Gen or AMD Ryzen 7000/9000
Frequently Asked Questions
Is DDR5 worth the extra cost over DDR4 in 2026?
It depends on your use case. For new builds on modern platforms (Intel 13th/14th Gen, AMD Ryzen 7000+), DDR5 is worth it as prices have dropped significantly and you get better performance and future-proofing. For upgrading an existing DDR4 system, switching to DDR5 requires a new motherboard and CPU, making it not cost-effective unless you're doing a full platform upgrade.
Can I use DDR5 RAM in a DDR4 motherboard?
No. DDR4 and DDR5 are physically incompatible - they have different pin configurations and notch positions to prevent incorrect installation. You must use the DDR type that your motherboard supports. Some newer Intel motherboards offer both DDR4 and DDR5 variants, so check your specific board's specifications.
Is DDR5 faster than DDR4 for gaming?
DDR5 offers higher bandwidth and can improve performance in some games, particularly at higher resolutions and in CPU-bound scenarios. However, the real-world gaming difference between DDR4-3600 and DDR5-5600 is typically 5-15% in most titles. The gap widens with higher-speed DDR5 kits (6000MHz+). For competitive gaming at 1080p, DDR5 can make a more noticeable difference.
What DDR4 speed should I buy?
DDR4-3200 is the sweet spot for most users, offering the best balance of price and performance. DDR4-3600 offers a small uplift for gaming. Going above DDR4-3600 has diminishing returns and costs significantly more per GB. For Intel systems, DDR4-3200 is typically the best value; for AMD Ryzen, DDR4-3600 with tight timings is ideal.
What DDR5 speed should I buy?
DDR5-5600 to DDR5-6000 offers the best price-to-performance for most users. DDR5-6400 provides a noticeable boost for gaming and content creation. Going above DDR5-6400 is mainly for enthusiasts and overclockers, as the price premium is steep. For AMD Ryzen 7000, DDR5-6000 is the sweet spot due to the 1:1 FCLK ratio.