Core i5-13400F SRMBG and SRMBN
In the vast majority of Intel Core i5-13400F processor tests (including ours), you’ve studied the results of the variant built on the Golden Cove cores from the Alder Lake generation. But there is also an iteration from Raptor Lake (with Raptor Cove cores). However, this processor is harder to get hold of, its availability is considerably weaker, but it is obtainable. You’ll find out if it’s worth the extra effort from the comparative analysis.
Which Intel Core i5-13400F processor is “better”?
If you’ve purchased a Core i5-13400F processor separately or are about to do so, you’ll most likely come across a variant that physically has a die from the last generation, Alder Lake. The larger one of course, with 8 P cores and 8 E cores natively – stepping C0.
In order to reliably obtain the stepping B0 (with the Raptor Lake die) you would have to really have your eyes set on it. The chances of you getting to this processor by accident are pretty slim. It’s only on sale as a “tray”, that is, without a cooler (just the bare CPU), intended primarily for aftermarket PC vendors. On the retail market, stepping C0 is common, which is already sold as a “box” (with the Intel Laminar RM1 cooler). Its order number is BX8071513400FSRMBN. The „tray“ variant is then CM8071505093005. Stepping B0 is only available in the “tray” variant (with order number CM8071504821107), which is popular especially in the OEM market. The significantly smaller supply of B0 variants will probably be due to the fact that Intel wants to use them as much as possible for more powerful models, and on the contrary, there is a surplus of older Alder Lake (C0) dies, which will not be gotten rid of elsewhere (as in the 65 W Core i5). The Core i3-13100(F) already uses a different die. Also AL, but “H0” (i.e. the smaller one, physically without E cores).
You can also recognize Stepping B0 (Raptor Lake) in a better catalog by the S-Spec code, which is SRMBG. It differs from Stepping C0 (Alder Lake, S-Spec code SRMBN) in the last letter of the designation – “G” instead of “N”. The physical differences, apart from the different markings on the IHS, are visible from the back, where there is a different SMD composition between the contacts. For stepping B0, these components are the same as in the more powerful Raptor Lake processors, and for stepping C0 again as in Alder Lake processors, that is, outside of those with a smaller die with only 6 P cores. CPUs that have the latter are Core i3s and Pentiums, but also the Core i5-12400 stepping H0.
Quite significant differences across steppings (H0 and C0) are also present in Ci5-12400, but in this generation it may be even more interesting. Last time it was about one of the dies being significantly smaller, but still manufactured using the same process (Intel 7). This time the difference in the size of the dies and their native features is quite a bit smaller, but the manufacturing process is different, with stepping B0 being the more modern Intel 7 Ultra. All parameters are otherwise the same, yet these processors may perform differently. And that’s what we’ll focus on in the next pages of the article.
Testing is performed according to standard processor measurement methods. But we don’t go through everything in order and the test set is on the smaller side. It contains those measurements (+ memory tests) in which, in addition to computing or gaming performance, we also record operational characteristics – power draw, temperature and achieved CPU core clock speeds.
Which methods, settings and conditions we use to measure each variable are described in detail in the following links – temperature, core clock speeds and power draw. Regarding power draw, just briefly note that it is measured with current clamps. And just so you don’t have to hunt for key components from other articles, the motherboard is Asus ROG Strix Z790-E Gaming WiFi (BIOS v0502) and the memory is Kingston Fury Beast (2×16 GB, 5200 MHz/CL40) with a 1300 MHz memory controller (Gear 2). The CPU cooler used is the Noctua NH-U14S.
- Core i5-13400F SRMBG and SRMBN
- Performance tests
- Memory and cache tests
- CPU power draw curve
- Average CPU power draw
- Achieved CPU clock speeds
- CPU temperature