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Corsair CMK16GX4M4A2666C16 Vengeance LPX 16GB DDR4 2666MHz Memory — main product image
Corsair CMK16GX4M4A2666C16 Vengeance LPX 16GB DDR4 2666MHz Memory
Corsair CMK16GX4M4A2666C16 Vengeance LPX 16GB DDR4 2666MHz Memory
Corsair CMK16GX4M4A2666C16 Vengeance LPX 16GB DDR4 2666MHz Memory
Corsair CMK16GX4M4A2666C16 Vengeance LPX 16GB DDR4 2666MHz Memory
Corsair CMK16GX4M4A2666C16 Vengeance LPX 16GB DDR4 2666MHz Memory
Corsair CMK16GX4M4A2666C16 Vengeance LPX 16GB DDR4 2666MHz Memory
Corsair

Corsair CMK16GX4M4A2666C16 Vengeance LPX 16GB DDR4 2666MHz Memory

★★★★★4.8 (63874 reviews)
16GB DDR4

Four sticks of DDR4-2666 in a low-profile heatspreader give your X99 or mainstream Intel platform 16GB of overclocking-ready bandwidth headroom.

$69.99*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The Corsair Vengeance LPX CMK16GX4M4A2666C16 is a 16GB DDR4 kit in a 4×4GB configuration, running at 2666 MHz (PC4-21300) with CL16 timings. The numbers tell a specific story: this is a quad-channel-ready kit, designed at a time when Intel's X99 HEDT platform demanded four sticks to fully saturate its memory bus. Four channels at 2666 MHz on X99 delivers meaningful bandwidth headroom for memory-intensive workloads — video editing, 3D rendering, large dataset processing — where a dual-stick configuration left channel bandwidth on the table. The XMP profile makes speed activation simple: enter BIOS, enable XMP, and the kit runs at its rated 2666/CL16 specification without manual intervention.

The low-profile heatspreader is the kit's most immediately practical physical feature — at approximately 34mm tall, it clears the fin stacks of large tower coolers that physically obstruct standard-height DIMM modules, making the LPX a go-to choice for builders prioritizing air cooling without compromising memory slot access. Today, 2666 MHz sits at the lower end of the DDR4 performance range as boards and processors increasingly tune for 3200 MHz and above, so this kit is best matched to platforms where 2666 is the rated ceiling or where budget constraints make the speed trade-off acceptable. For X99 builds, legacy system refreshes, or any Intel platform where stability and cooler clearance matter more than peak bandwidth, the Vengeance LPX delivers exactly what it promises.

Key Features

Designed for high-performance overclocking

Designed for great looks

Performance and Compatibility

Low-profile heat spreader design

Specifications

Capacity
16GB (4×4GB)
Memory Type
DDR4
Speed
2666 MHz (PC4-21300)
CAS Latency
CL16
Heatspreader Profile
Low-profile (~34mm)
Color
Black
XMP Support
Yes
Primary Design Target
Intel X99 / high-performance overclocking platforms

Corsair Vengeance LPX DDR4 3200MHz — Editorial Review & Buying Guide

The Corsair Vengeance LPX DDR4 3200MHz family (CMK8GX4M1E3200C16, CMK16GX4M2B3200C16, CMK32GX4M2E3200C16 and similar SKUs) is Corsair's mainstream-popular DDR4 desktop RAM line — low-profile aluminum heatspreaders, XMP 2.0 profile for 3200MHz at CL16 latency on Intel Z-series + AMD Ryzen X570/B550/B650 motherboards. Per Corsair's official Vengeance LPX product family page, the line targets gaming + content-creator builds with reliable XMP timings, 8-layer PCB construction for memory signal integrity, and limited lifetime warranty. Available in 8GB single, 2×8GB (16GB), 2×16GB (32GB), and 2×32GB (64GB) kits.

What Vengeance LPX DDR4 3200 Specifically Wins

  • 3200MHz at CL16 is the AMD Ryzen sweet spot — per AMD's official memory documentation for Zen 2 / Zen 3 / Zen 4 platforms, 3200MHz CL16-18-18-36 is the highest officially-supported speed for stable 1:1 FCLK / UCLK / MEMCLK ratio on Ryzen — beyond this you enter 2:1 mode with worse latency
  • Low-profile heatspreader (34mm tall) — clears tower-style CPU coolers (Noctua NH-D15, be quiet! Dark Rock 4, Deepcool AK620) without RAM-slot conflicts. Critical for ATX builds with large coolers
  • XMP 2.0 profile — one-click BIOS enable for advertised speeds; no manual timings configuration needed
  • Lifetime warranty — Corsair stands behind the product; replacement is straightforward via Corsair RMA
  • Wide motherboard compatibility — works with Intel Z270/Z370/Z390/Z490/Z590/Z690/Z790, AMD X470/X570/B550/X670/B650 (where DDR4 motherboards exist for AM5)
  • Single rank (8GB modules) or dual rank (16/32GB modules) — single rank typically benchmarks slightly faster on Intel; dual rank slightly faster on AMD. Either works
  • Consistent SKU naming — CMK[size]GX4M[count][model][speed][cas] — easier to parse than competing brands' codes

Where Vengeance LPX 3200 Specifically Fits

  • Gaming desktop builds (Ryzen 5/7/9 + Intel i5/i7/i9) — 16GB is the modern gaming floor, 32GB is the sweet spot
  • Content creator workstations (video editing, photo, design) — 32GB for moderate work, 64GB for video editing / 3D / VFX
  • Compact ITX builds with low-profile coolers (Noctua NH-L9i, ID-Cooling IS-55) where heatspreader height matters
  • Twitch / YouTube streaming PCs running OBS + game + browser + Discord — 32GB minimum for smooth multi-app workflows
  • Office / productivity builds — 16GB Vengeance LPX provides better-than-default RAM at marginal cost over commodity OEM RAM
  • Mid-tier home server / NAS builds (FreeNAS / TrueNAS / Unraid) needing ECC-compatible motherboard support
  • VR-ready gaming setups — Quest 2/3 Link + heavy game requires 32GB+ for smooth streaming

Honest Limits Buyers Should Know

  • DDR4 only — not for DDR5 motherboards. Current Intel 12th/13th/14th gen + AMD Ryzen 7000 series motherboards mostly use DDR5. Verify the motherboard's memory generation before purchase — DDR4 RAM does NOT fit DDR5 slots
  • 3200MHz is mainstream — not high-end. Faster Vengeance LPX kits exist at 3600/3866/4000MHz with lower CL latencies for enthusiast overclocking. The 3200/CL16 spec is the "safe and stable" default; performance gains from 3600+ are modest for typical use
  • Limited overclocking headroom on AMD Ryzen. Beyond AMD's official 3200MHz sweet spot, manual timing tuning is required + benefits are platform-specific. Intel platforms tolerate higher speeds more easily
  • No RGB. Vengeance LPX is the non-RGB line. For RGB lighting, step up to Vengeance RGB Pro / RGB Pro SL / Dominator Platinum RGB. Note: RGB adds ~30% to memory cost without performance benefit
  • Heatspreader is decorative on DDR4. DDR4 at 3200MHz doesn't generate enough heat to require active cooling; the heatspreader is more cosmetic than functional
  • Compatibility quirks on first-gen Ryzen (Ryzen 1000/2000). Earlier Zen 1 / Zen+ platforms struggled with 3200MHz Hynix die memory. Sample Vengeance LPX kits with Samsung B-die or Micron E-die typically work; pure Hynix CJR / DJR can require manual tuning. Modern Zen 3+ has resolved this
  • Non-ECC. For mission-critical workstations / servers needing error correction, look at Crucial / Kingston Server Premier ECC variants
  • Multi-stick kits required for dual-channel operation. Single-stick installations work but lose ~30% bandwidth vs matched-kit dual-channel. Buy as 2-stick kit, never single + single matched-spec

Where Buyers Should Look Elsewhere

  • DDR5 platforms (Intel 12th+ / AMD Ryzen 7000+) → Corsair Vengeance DDR5 (different SKU prefix), G.SKILL Trident Z5
  • Highest possible RAM speed for Intel → G.SKILL Trident Z Royal / Z5 RGB / Neo at 4000-7600MHz
  • RGB aesthetic → Corsair Vengeance RGB Pro SL, G.SKILL Trident Z5 RGB
  • ECC server / workstation → Kingston Server Premier ECC, Crucial Server ECC
  • Pure budget (acceptable speed loss) → Crucial Ballistix DDR4 2400/2666 or Kingston Fury Beast DDR4 2666/3000
  • Premium SK Hynix die for tight subtimings → G.SKILL Trident Z Royal, Crucial Ballistix RGB

Sources & Citations

  1. Corsair, "Vengeance LPX 3200MHz product page," corsair.com (accessed 2026-05-18)
  2. AMD, "Ryzen memory documentation and supported DDR4 speeds," amd.com (accessed 2026-05-18)
  3. Tom's Hardware, "DDR4 3200 memory comparison and benchmarks," tomshardware.com (accessed 2026-05-18)
  4. AnandTech, "DDR4 memory review coverage," anandtech.com (accessed 2026-05-18)

Last verified: 2026-05-18

Now that you've seen the details — ready to take a closer look?

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Pros & Cons

👍 Pros

  • Low-profile 34mm heatspreader physically clears large air coolers that incompatible with taller DIMM heatspreaders — a genuine engineering fit for dense builds
  • XMP support enables straightforward BIOS-level activation of the rated 2666 MHz speed without manual timing entry
  • Four-stick quad-channel configuration fully populates X99 and HEDT platforms, unlocking maximum memory bandwidth on those architectures
  • DDR4 compatibility ensures broad platform support across Intel mainstream and HEDT chipsets from the DDR4 era
  • 16GB total capacity hits the practical minimum for content creation, multitasking, and light to moderate application workloads

👎 Cons

  • 4×4GB configuration fills all four DIMM slots on a standard board, eliminating any upgrade path without a full kit replacement — 2×8GB offers more future flexibility
  • CL16 timings are not tight by overclocker standards; higher-performance kits at the same 2666 MHz or faster frequencies offer better true latency
  • DDR4-2666 is a mature, now-baseline speed — on modern platforms that support DDR4-3200 and above as standard, this kit will run below the board's optimal bandwidth profile unless the platform's maximum is 2666 MHz
  • No higher-speed rated profiles on this specific model; users wanting headroom beyond 2666 MHz need a different SKU in the Vengeance LPX lineup

Frequently Asked Questions

DDR4-2666 delivers approximately 21.3 GB/s of theoretical peak bandwidth per channel. For the quad-channel X99 platform this kit was designed for, that totals ~85 GB/s combined — enough for virtually all productivity and content creation workloads. On mainstream dual-channel Z-series platforms, 2666 MHz is also a solid baseline that won't bottleneck CPU or GPU performance in the vast majority of use cases.
Yes, and it matters specifically for upgradeability. A 4×4GB kit fills all four DIMM slots on a quad-channel board, leaving no room for expansion without replacing the entire kit. On a dual-channel board with four slots, you occupy all slots as well. If you anticipate needing more than 16GB in the future, a 2×8GB configuration is a more flexible investment that leaves slots open for additional modules.
The Vengeance LPX's reduced heatspreader height — approximately 34mm — is specifically designed to clear large air coolers that would physically conflict with standard or high-profile heatspreaders. If you're running a tower cooler with wide fins that extend over the DIMM slots, LPX is often the only DDR4 kit that will fit without modification.
Yes. DDR4 ships at JEDEC baseline speeds by default — your system will likely POST at 2133 or 2400 MHz until you enable XMP (Intel) or DOCP/EXPO (AMD) in BIOS. Enabling XMP Profile 1 sets the kit to its rated 2666 MHz at CL16 timings automatically. Without XMP enabled, you are leaving rated performance on the table.
CL16 at 2666 MHz gives a true latency of approximately 12 nanoseconds. Higher-frequency kits with the same CL16 timing will have lower true latency — a 3200 MHz CL16 kit hits roughly 10ns. The gap is real but small in absolute terms; real-world application benchmarks show marginal differences in most workloads. For pure competitive gaming or latency-sensitive workloads, a tighter-timed kit at higher frequency is measurably but not dramatically better.

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