The Samsung D Die model does not reach 2600MHz even when overclocked.
The Samsung D Die model does not reach 2600MHz even when overclocked.
I own a Samsung D-Die RAM (m378a5143db0-cpb) which isn't ideal but should be straightforward to install near 3000MHz, right? No matter what I adjust, it still fails to boot at 2600MHz. I experiment with timings 20-20-20-44 at 2T, 1.4V, but nothing works. My motherboard is X99 Deluxe II with an i7 5820K CPU. The RAM only boots at 2400MHz (though it was unstable even in the BIOS).
To a point, they will.
I'm not claiming the difference in being completely identical is the reason for the problem... it’s highly improbable. What I’m saying is, if you aim to determine the limit of a specific DIMM, you need to consider it separately. Otherwise, the weaker one—when it comes to voltage or timing requirements—always has the chance to maintain the better option.
In this situation, it doesn’t appear either of these DIMMs can exceed 2400MHz, so the matter is essentially closed.
Are you attempting to increase the frequency from 2100MHz to 2600MHz? How is the RAM being cooled? If you could raise the 2100MHz RAM to 3000MHz simply by adjusting timings and voltage... then very few people would be interested in higher-speed RAM.
I strongly question whether a 4GB 2133MHz, single-rank module can handle 3000MHz at 1.4V, no matter the timing settings. I expected 2666MHz might work, particularly with such relaxed timings.
Are you posting only this module installed? Or are you using multiple copies of the same or mismatched units?
If that doesn't work, try booting with CL22—the most lenient option for a 1x4GB DDR4 DIMM. With suitable timings and voltage, the Samsung DIMM should reach 2400-2666MHz. While this timing/voltage combination may not be ideal for performance, it should still function. 3000MHz is probably too far out of range for stable operation, at least that's my concern.
Ultimately, there's a reason (some) modules are sold as what they are. If a kit could've been (easily) clocked to 2666MHz, it would've been so, and sold for a slightly higher price vs. 2133MHz.
Samsung chips in general are pretty good at bumping clocks without having to go crazy loose on timings, but there's no guarantee. Especially when those DIMMs are some of the cheapest 1x4GB DIMMs out there.
Try with only one, and see if you have any more success. Not a great solution but, as far as I can tell, those weren't sold in 2x4GB kits, they were strictly 1x4 - so may just not be 'playing nice' with each other.
I used one of each stick with the same settings and timing at 2600mhz, but it didn't work. The two sticks I had from HP desktops were identical.
It seems likely that 2400MHz will be sufficient without pushing the voltage too high. They aren't exactly the same. Even when two DIMMs are sold together, they aren't identical—they're only assured to meet their advertised specifications. There are minor differences between each DIMM, but they all follow the same tolerances, which match what they claim. Once you begin overclocking, things change completely.
It's strange they share the same settings but differ in posts.
To a point, they will.
I'm not claiming the difference in being completely alike is the reason for the problem... it’s highly improbable that’s the case. I’m just highlighting that, if you aim to determine the limit of a specific DIMM, you must analyze it separately, because the smaller one—when considering voltage or timing requirements—always has the chance to offer the superior option.
In this situation, neither DIMM appears to support speeds above 2400MHz, making the matter irrelevant.