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Don't waste money chasing RAM speed for gaming on AMD or Intel
By Chris Szewczyk published October 05, 2020
Revisiting the question that every gamer considers when building a new gaming system: does RAM speed matter?
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(Image credit: Teamgroup)
The relevance of RAM speed to PC gaming is one of the most enduring of component discussions. If you're putting together a gaming PC build how much attention and money should you pay towards dropping a chunk of high speed RAM into your rig?
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We’re taking a look at a mix of games, some brand new, and one oldies but goodies, to see just how RAM speed affects both Intel and AMD systems in 2020. On paper, faster memory is desirable, but is it really necessary and worth the expense? We all know that a faster GPU will lead to a higher frame rate, and a faster CPU will lessen a potential bottleneck, but RAM speed seems to be one of those things that doesn’t have as clear an answer.
Let’s begin with a look at the system architectures.
AMD and Intel architectures and topology are fundamentally different. The topology in particular has a measurable impact on RAM performance and the resulting bandwidth and latency. As it stands now, Intel CPUs are widely regarded as having an advantage when it comes to gaming performance, particularly at the high end with several models benefiting from 5 GHz+ clock speeds, but that’s not the only reason for Intel’s advantage.
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A big part of Intel’s gaming advantage comes from its monolithic die architecture. Having all the cores, cache, I/O, and memory controller on the same die is inherently advantageous for latency, which is usually something that games benefit from.
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On the other hand, AMD’s chiplet topology, and accompanying Infinity Fabric interconnect, cannot match the latency that would be achieved on a single die. AMD includes a very large L3 cache to help minimize this deficit (32MB for the 3700X vs 12MB for the i5-10600K). It keeps more data ‘close to the metal’ so to speak.
Some game engines are not sensitive to a few nanoseconds of latency here and there, while others derive benefit from AMD’s very large cache. Others hardly see any benefit at different RAM speeds.
Here’s a look at the latency of both Intel and AMD systems tested across various speeds, where the lower the latency the better the result.

(Image credit: Future)
Intel clearly has the advantage here. We also get our first indicator of the ‘wall’ on AMD systems above DDR4-3600. We’ll come back to that. (Spoiler: DDR4-3600 is the sweet spot for AMD Ryzen 3000 systems)
We’ve tested four games. Admittedly it’s not a massive sample size, but they have been selected because they are very different from one another. We’ve got F1 2020, Horizon Zero Dawn, Metro Exodus and finally Civilization VI. They represent a driving game, a third person shooter, a first person shooter and a strategy game.
RAM speed test systems
Intel test systemAMD test systemCPUCore i5 10600KRyzen 7 3700XMotherboardAsus Maximus XII ApexMSI X570 GodlikeGraphics cardNvidia GeForce RTX 2080 Ti Founders EditionNvidia GeForce RTX 2080 Ti Founders EditionPower SupplyAntec HCP-1200Antec HCP-1200StorageSamsung 860 Pro 1TB (OS) & Western Digital Black SN750 1TB (Games)Samsung 860 Pro 1TB (OS) & Western Digital Black SN750 1TB (Games)CoolingNZXT X73 360mm AIONZXT X73 360mm AIOOperating SystemWindows 10 Pro 64 Bit 2004Windows 10 Pro 64 Bit 2004
We’ve tested at 3 different settings: 1080p at low settings, 1080p at maximum settings and 4K at maximum settings. This covers a good chunk of use
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