Are PCIe 4.0 and PCIe 3.0 backward and forward compatible?
Both PCIe 4.0 and PCIe 3.0 are backward and forward compatible.
Remember those high-speed components (GPUs, NVME SSDs, etc.) that use PCIe slots to interface with the motherboard and provide additional functionality?
Thanks to backward and forward compatibility, the new can be used with the old (backward compatibility), and the old can be used with the new (forward compatibility).
For example, a PCIe 4.0 graphics card can be inserted into a motherboard’s PCIe 3.0 slot; however, the Gen 4 card’s bandwidth would be bottlenecked by the Gen 3 slot’s bandwidth limitations.
Similarly, a PCIe Gen 3 graphics card can be inserted into a motherboard’s PCIe Gen 4 slot, but the Gen 3 graphics card will be incapable of fully utilizing the higher bandwidth capabilities of the Gen 4 slot due to the card’s intrinsic bandwidth limitations.
Your expansion card doesn’t have to be installed on a slot with the same number of lanes, either.
For example, a PCIe 4.0 SSD with four lanes can be inserted into a x16 slot.
But the inverse doesn’t work.
So, a PCIe 3.0 x16 graphics card won’t fit in a x1, x2, x4 or x8 slot.
In short, the slot into which the expansion card is being inserted must have an equal or greater number of lanes.
Otherwise, the card can’t physically be inserted into the slot.
Photo: There are a few things to keep in mind when choosing PCIe 4.0 SSDs and PCIe 4.0 GPUs, mainly the population and PCIe generation of your motherboard's PCIe slots.
How fast is PCIe 4.0 vs. PCIe 3.0?
PCIe 4.0 is twice as fast as PCIe 3.0.
PCIe 4.0 has a 16 GT/s data rate, compared to its predecessor’s 8 GT/s. In addition, each PCIe 4.0 lane configuration supports double the bandwidth of PCIe 3.0, maxing out at 32 GB/s in a 16-lane slot, or 64 GB/s with bidirectional travel considered.
Table: The speed differences between PCIe 4.0 and PCIe 3.0 in each lane configuration.
Let’s use the 16-lane slot configuration to put the speed differences between PCIe 4.0 and 3.0 into perspective and make all this computer lingo a little more relatable.
For the purposes of this analogy, we’ll employ unidirectional bandwidth for both generations.
Photo: Aerial drone photograph of traffic in a metropolitan area, used to illustrate PCIe lanes.
Imagine 16 lanes of cars (data) traveling in 16 adjacent lanes (configuration) on the major PCIe 3.0 Highway (generation).
The cars are traveling at the posted PCIe 3.0 speed limit of 15 miles per hour (bandwidth).
Several miles in the opposite direction, however, the state (PCI-SIG) has just opened the PCIe 4.0 Highway and doubled the speed limit.
The cars on this highway are traveling faster at the newly posted PCIe 4.0 speed limit of 30 miles per hour.
And a couple of years from now, cars will be cruising on the PCIe 5.0 Highway, where they’ll be allowed to travel at a posted speed limit of 60 miles per hour.
And so on with each new PCI Express generation that PCI-SIG introduces.
Kiểm tra điểm chuẩn
Bên cạnh thông số thì thông tin về điểm chuẩn hiệu năng cũng là yếu tố rất quan trọng để đánh giá sức mạnh của hai chipset này. Vì với được ra mắt nên chưa có quá nhiều thông tin điểm chuẩn về chip Snapdragon 8s Gen 3. Tuy nhiên, kiểm tra GeekBench 6 với thiết bị đầu tiên cho thấy rõ phần nào sức mạnh của Snapdragon 8s Gen 3. Trong bài kiểm tra lõi đơn, Snapdragon 8 Gen 3 có điểm số cao hơn 26% so với bản Snap 8s Gen 3. Đến với bài kiểm tra đa lõi nó cao hơn 55%. Điều này cho thấy Snapdragon 8s Gen 3 sẽ nhỉnh hơn so với đa số chipset tầm trung hiện tại.
Kiểm tra điểm chuẩn GeekBench 6
Ở bài kiểm tra điểm chuẩn AnTuTu, Snapdragon 8s Gen 3 cũng mang tới điểm số rất cao. Nó chỉ kém hơn 45% so với chipset mạnh nhất của Qualcomm hiện tại. Dù con số này khá cao nhưng với phân khúc cận cao cấp thì mức hiệu năng như vậy là quá đủ. Kết quả này cao hơn so với chip Snapdragon 7 Plus Gen 3 ra mắt trước đó.
Kiểm tra điểm chuẩn AnTuTu 10
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How does PCIe 4.0 influence SSD and GPU selection?
As previously mentioned, PCIe 4.0 is backward and forward compatible. So, you can insert a PCIe 4.0 GPU into a PCIe 3.0 slot, but you'll be bottlenecked by the bandwidth limitations of Gen 3. In other words, you won't be able to take full advantage of the increased speeds of that awesome PCIe 4.0 GPU. The same goes for PCIe SSDs, so keep this in mind when you're shopping around.
If you're in the market for a high-speed PCIe 4.0 SSD, such as an PCIe 4.0 NVMe SSD, take comfort in knowing that you'll have the access to the latest and greatest that the PCIe specification has to offer with Gen 4, including increased data transfer rates, bandwidth, and decreased latency on the PCIe bus. This is assuming, of course, that your motherboard is equipped with PCIe Gen 4 slots into which you can insert these PCIe 4.0 SSDs.
Remember: the PCIe generation used on your motherboard's PCIe slots determines the data transfer rate and bandwidth of whatever expansion card you insert into it. PCIe 4.0 SSDs can only match the speeds of a PCIe 4.0 slot, and PCIe 3.0 SSDs can't leap in data transfer rate and bandwidth to PCIe 4.0. So, if you insert any PCIe 4.0 SSDs into previous-generation PCIe slots, you won't receive the bandwidth and data transfer rate increases you're expecting from PCIe 4.0, only the bandwidth and data transfer rate of that slot's particular PCIe generation.
There's also widespread use of PCIe 4.0 NVMe SSDs, specifically, mainly because NVMe has become the industry standard for PCIe SSDs, but also because NVMe SSDs reduce power consumption, further reduce latency, and incorporate 1,000,000 input/output operations per second (IOPS) compared to a SATA SSD's 200,000. This offers an obvious performance increase to users shopping around for PCIe 4.0 SSDs.
The same bandwidth and data transfer rate rules that apply to PCIe 4.0 SSDs apply to PCIe 4.0 GPUs. If you purchase a PCIe 4.0 GPU for your system and seek to benefit from PCIe Gen 4's performance increases and reduced latency, then your motherboard will need to be populated with a PCIe 4.0 slot of appropriate lane size to support your PCIe 4.0 GPU.
Otherwise, your PCIe 4.0 GPU will be stuck with previous-generation speeds, and who wants to purchase a new, shiny, expensive PCIe 4.0 GPU without, you know, reaping the benefits of PCIe 4.0?
We're starting to see more and more PCIe 4.0 GPUs pop up on the market, and it's clear that they'll play a pivotal role in streamlining and boosting the performance of data-intensive artificial intelligence (AI) and machine learning (ML) applications of the future. But the last thing you want to do is purchase one for your system and find out it's useless.
Is upgrading to PCIe 4.0 worth it?
PCIe 4.0 supports double the bandwidth of PCIe 3.0, so if you want to take advantage of the bandwidth capabilities of that PCIe 4.0 expansion card you just purchased, then you’ll need PCIe 4.0 slots on your motherboard.
It’s as simple as that.
But if you’re comfortable with a certain degree of bandwidth limitation and don’t want to spend the money to upgrade to a PCIe 4.0 motherboard, then upgrading to Gen 4 probably won’t be worth it to you.
Plus, if you’re working with PCIe 3.0 expansion cards and slots, anyway, and they’re providing you with the speeds that your application needs, then don’t worry about upgrading to Gen 4.
When deciding whether to upgrade, ask yourself two key questions:
Contact Trenton Systems today or chat with a member of our team to discuss whether upgrading is right for you.
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Trenton Systems creates rugged computer systems to help customers around the world meet their rugged computing needs. We stress-test our computer systems to the max, ensuring that customers can carry out industry-specific operations comfortably, effectively and smack dab in the middle of the world's harshest conditions. In other words, we stress so you don't have to.
We pride ourselves in being highly agile and responsive in tailoring our connectivity solutions and service delivery to your locational challenges, your unique industry needs, and specific business goals.
Trên thị trường hiện tại thì Snapdragon 8 Gen 3 là con chip cao cấp được yêu thích nhất. Tiếp nối sự thành công của nó, Qualcomm đã mang tới một phiên bản hạ cấp của nó dành cho phân khúc thấp hơn với tên Snapdragon 8s Gen 3. Dù là phiên bản hạ cấp nhưng nó vẫn mang đầy đủ công nghệ từ bản gốc và chỉ giảm bớt nhẹ về hiệu suất. Vậy Snapdragon 8s Gen 3 có sức mạnh kém hơn Snapdragon 8 Gen 3 bao nhiêu? Hãy cùng so sánh Snapdragon 8s Gen 3 vs Snapdragon 8 Gen 3 trong bài viết dưới đây.
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So sánh Snapdragon 8s Gen 3 vs Snapdragon 8 Gen 3
So sánh tổng thể hiệu năng
So sánh tổng thể Snapdragon 8s Gen 3 vs Snapdragon 8 Gen 3
Đánh giá tổng thể hiệu năng của Snapdragon 8s Gen 3 vs Snapdragon 8 Gen 3. Đây là hai con chip mạnh mẽ trong dòng 8 series. Phiên bản Snapdragon 8s Gen 3 mang tới mức hiệu suất kém hơn nhưng các tính năng hỗ trợ thì gần như ngang ngửa với đàn anh của nó. Nói về ưu điểm của từng chipset thì bạn có thể tham khảo chi tiết dưới đây.
Ưu điểm của Snapdragon 8 Gen 3:
Ưu điểm của Snapdragon 8s Gen 3:
Cùng so sánh Snapdragon 8s Gen 3 vs Snapdragon 8 Gen 3, hai vi xử lý di động với cái tên gần như giống hệt nhau, nhưng liệu rằng hiệu năng của chúng có mang tới sự tương đồng hay không? Hay có sự phân cấp nào giữa chúng hay không? Câu trả lời chi tiết nằm ngay trong bài viết so sánh Snapdragon 8s Gen 3 vs Snapdragon 8 Gen 3 dưới đây.
