PCIe Gen3/Gen4是否會造成RTX3080的瓶頸? - 3C

評測解禁後，很快也有RTX3080搭配Intel (10900K)和AMD (3900XT)的比較...
其實在之前多數遊戲評測上都可以清楚知道，在這部分的應用，還是Intel略勝一籌，
所以這個交叉評測主要重點在於目前兩家分別最高支援PCIe Gen 3和PCIe Gen 4，
到底會不會對於效能大躍進的RTX3080產生實際上的瓶頸與影響。


We already have a general idea of how the Ryzen 9 3900XT compares to the
i9-10900K when tested with a GeForce RTX 2080 Ti in its dedicated review of
the processor. However, one of the questions we're trying to answer is
whether PCIe Gen 4 helps the 3900XT gain on the i9-10900K. Our testing data
should also give you insights into whether the Ryzen 9 3900XT suits your
needs as a gaming and productivity machine combined, in which your line of
work can benefit from the extra two cores.

在這部分的測試，從評測結果可以得知PCIe Gen3/4幾乎沒影響，也就是說即使是RTX 3080，
也還無法撐到PCIe Gen 3的頻寬上限...

After finishing the "normal at stock" testing, I got curious about how much
of the performance difference can be attributed to the PCI-Express link speed
advantage Ryzen has over the i9-10900K. Remember, Intel's Comet Lake CPUs
still max out at PCI-Express Gen 3. The NVIDIA GeForce RTX 3080 introduces
PCIe 4.0 support, so the assumption could be that Ampere will work better on
AMD CPUs than on Intel, because the former support the faster PCI-Express Gen
4 mode. That's what the second AMD data point is for, colored in light red.
However, we see only minor differences that average out to 1% vs. the Gen 4
results, no matter the resolution. Even the RTX 3080 isn't anywhere close to
saturating the PCI-Express Gen 3 interface so that Gen 4 could provide an
increase in performance.

有興趣可以看下面評測原文：
NVIDIA GeForce RTX 3080 with AMD Ryzen 3900XT vs. Intel Core i9-10900K
https://reurl.cc/2gWoRr


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