The ever-evolving tech world transforms luxury into necessity in the blink of an eye - take SSD cards, for example. Rarely do you see anyone using HDDs in place of SSDs anymore, because it’s logically the better choice.
This pursuit of ‘better choice’ leads us to one drastically dramatic comparison; that of PCIe 5.0 and 4.0 SSDs. These PCIe are two of the most iconic generations of SSDs. These two gens excel in every aspect; from raw speed to bandwidth and heat, you just ask for it, they’ve got it. But one has to be better than the other, regardless of your need as a speed freak.
This blog will shortlist the general contrasting factors between generation 5.0 and 4.0 SSDs. So, put on your reading glasses and unveil the better brother.
What is a PCIe SSD?
PCIe is short for Peripheral Component Interconnect Express, whereas SSD stands for Solid State Drive. As is common knowledge, an SSD is a storage card, often taken as a replacement for RAM. It is used to hoard (permanently) and supply data to your system, boost acceleration, and support graphics-intensive workloads.
But where does PCIe fit in this scenario? It is the force that connects an SSD to all its various components present on the motherboard. The various components in question include GPUs, WiFi cards, storage controllers and other peripheral devices. It uses the ‘lane-like’ architecture; to understand this, it’s better to imagine PCIe as a series of lanes to transfer information to the CPU.
The number of lanes in each generation differs, though you’ll always find four wires in every lane, and that too in sets of two. One set of wires is responsible for receiving information, while the other delivers it. This translates to meaning that more lanes equal to more wires, which is better for speedy data processing and better communication.
Key Differences Between PCIe 5.0 & 4.0
Features | PCIe 4.0 | PCIe 5.0 |
Bandwidth | 16 GT/s | 32 GT/s |
Average Latency | 200 nanoseconds | 100 nanoseconds |
Performance Speed | 7000-7400 MB/s | Up to 14000 MB/s |
NVMe Version | 1.3/1.4 | 2.0 |
Average Price | Under $100 | Under $200 |
Power Usage | Moderate | High |
No. of Heatsink Fans | Moderate | High |
Max Bandwidth
The frequency of data transmission matters the most when determining which PCIe is the best. It's public knowledge that if you need flashy information access, you should opt for the highest bandwidth count. A good memory bandwidth allows smooth transition of high-resolution video files, runs heavy data simulations, and ensures multitasking.
Version 4 supports a bandwidth speed of 16 GT/s. It calculates to 64 GB/s, which is enough for some users, depending on their workload. However, version 5 doubles the Gigatransfer rate to 32 GT/s, which prevents your system from choking under pressure. It roughly calculates to 128 GB/s, which also theoretically prevents system lagging.
Latency
We guess everyone agrees that the loading sign is a universal ick, regardless of how much time you have. High latency means you have to wait a good few seconds at least before whatever program you’re using responds to you. This is why the pace at which the files start moving is measured in nanoseconds, because even seconds can’t suffice.
There isn’t an exact latency measurement of the generations, mainly because it differs from application to application. On average, version 4 offers round-trip latencies of around 200 n/s, which is 100 n/s more than version 5. Version 5 is the clear winner here, and it owes its low latency to the comparatively high bandwidth and improved signal integrity.
Power Consumption
It’s common sense that low power consumption in devices is always the way to go. Low energy intake equals low heat, long battery, and system stability with minimum to no voltage fluctuations. One of the major risks of high power is thermal throttle, in which your device automatically slows down to protect itself from a potential heatstroke.
Between generations 4.0 and 5.0, the latter consumes more energy. The 6-10 watts average load power is justified by the low information retrieval and moderate latency. On the contrary, the generation 5.0 consumes on average 10-15 watts, which is shown by the system efficiency.
NVMe Version
With NVMe, your SSD card can communicate with the CPU faster and more efficiently, compared to other technologies like SATA. It works in collaboration with the PCIe, ensuring that data is optimised while it is being transferred and processed. Without an NVMe, it’s not possible for an SSD to achieve its full potential.
Version 4 utilises NVMe 1.3 and 1.4, which are not the latest technology, hence a bit obsolete. Even though these ensure data security and thermal management, they’re nowhere near as good as the NVMe 2.0 employed by generation 5. The 2.0 adaptation future-proofs your system, making it ready for large-scale AI processing.
Heatsinks
Just like a CPU and GPU, SSD cards also generate heat during operation, especially when handling vigorous tasks. The obvious consequence of this heat emission is thermal throttling, which is countered by heatsinks. It sucks in the heat from around the SSD with the help of its fans.
Version 4 features a compact heatsink that is usually not that thick and has integrated thermal pads. Since version 5 utilises more resources, it also generates more heat and employs a chunky heatsink with miniature fans. This maintains performance speed without risking hardware safety.
Performance
At the end, it boils down to the real-world performance to determine which generation is better. That said, this factor does not matter for everyone, especially those involved in regular lightweight tasks like web browsing. Though if you’re after raw tasks where transferring multiple gigabyte video files is mandatory, the Gen-5 can max out at around 14000 MB/s.
With the Gen-4, you should have sequential read speeds of over 7000 MB/s. Hence, in terms of productivity gains of professional use, the latter generation, Gen-5, is a gem. It will benefit you from a smooth performance even with multiple tabs open.
Final Verdict - Which One is Better?
It’s obvious that the gains from PCIe 5.0 are much more than those of 4.0. Yes, both offer fast speed, low latency, and NVMe support, but for different target bases. If you’re into light computing with no graphics-intensive tasks, then generation 4 is a great match for you. It is, in fact, better for you than the generation 5, which is more expensive.
However, if you have to deal with heavier workloads and have absolutely zero tolerance for transfer wait time and system lags, we recommend you opt for generation 5.0. It is more compatible with your needs and aligns with your work type. Not to mention, generation 5.0 also paves the path for future computing for you.
