Samsung 840 EVO 1TB Benchmarks



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I bought this drive because of this glowing review. Later, I began seeing references elsewhere that what I spent $600 on is TLC, not MLC as the review led me to believe. Samsung's website describes this as incorporating their "new 3 bit MLC NAND..." I logged into my Samsung account and wrote their customer support for clarification, but after three weeks passed without a reply, I called them on the phone and got confirmation that EVO SSD's are TLC. No wonder it has a three year warranty.

I love Maximum PC and have relied on their reviews over many years, but I wouldn't have wasted $600 on TLC had Josh Norem made that clear. Now I'm using an SSD in maximum reliability mode so that my TLC NAND doesn't burn out in a few years and don't enjoy blistering speed. What I did was essentially like buying a car advertised as having DOHC, which everyone thinks is double overhead camshaft, and find out after the fact that it's really diameter overhead camshaft. I'm disappointed with Maximum PC and Samsung. Don't trust everything you read in Maximum PC.


John Pombrio

I just bought four of the Samsung 840 EVO 250GB brand new drives, $129 each with free shipping. This is the price of the 120GB drive. What WAS this lady thinking at the beauty site where I bought them? Came from in Ohio. I have installed 3 of them so far and they are the real deal. Best buy will replace the drive if defective according to the invoice.



SATA 3 is essentially double the bandwidth of SATA 2.

The SATA 2 bus tops out around 300 MB/sec, and SATA 3 tops out around 600 MB/sec. Actual, real-world measured speed will always be slightly lower, even when fully saturated - closer to 280 MB & 580 MB respectively.



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I hope Samsung gives people the option to disable Rapid Mode for writes. Caching data that is going to be written isn't a good idea, from a data loss point of view at least (like roberto.tomas said, you lose power/PC crashes/other bad stuff while you've got data in the cache, your data is gone).

Also, noticed some people talking about Linux compatibility. If you're only looking to get the speed benefits from Samsung Magician's Rapid Mode, I don't _think_ you really have to worry about it. I think the Linux kernel automatically caches recently used files in RAM (assuming of course there's enough available), so it basically does the same thing as Samsung's software. I haven't used Linux in a while though, so would probably be best to search this up to confirm...

Anyway, after using my 840 Pro for a while, I don't think I'll be going back to traditional HDD's. At least not for storage of my games and apps. The speed benefits are just awesome, plus they're cool, power efficient and completely silent. Still a little weary about reliability of future NAND as the manufacturing processes continue to get smaller and therefore less reliable. Not to mention the firmware hiccups that so many SSDs seem to have.

Hoping to go all flash storage for my next build though. Probably won't be for a while as my 2500K is still kicking ass, but we'll see. Would love a quiet, fast, m-ITX system to sit on the desk, rather than the monstrous thing I have now. For now I'll have to resist the sexy beast that is ASUS' ROG Impact, and hope SATA Express SSDs come along soon too. :P


Renegade Knight

I just got the Micron M500 960gb drive. Can't speak to how fast it is relative to Samsung but it's a lot faster than the Seagate 2.5" 7K rpm drive it replaces.



How does this not saturate SATA III?

I don't understand how benchmark results like this are possible... if SATA III is 6 gigaBITs, and 6 gigaBITS equals .75 gigaBYTES, how is a result of 1 gigaBYTE possible?



"Rapid Mode" creates a cache in your system RAM of up to one gigabyte. So when your CPU requests data that you've cached, that data isn't limited by the speed of the SATA bus.



cant wait to try out that caching software on my dual 840 Pro's in raid. hot damn, thatll be nice.



When the Samsung Magician softwware 4.2 comes out it should allow it - we just don't know when they'll release it.



Dammmmmm, I didn't think they were gonna be that fast. I just bought a 250GB samsung 840 like 2 weeks ago. I would have gladly wait and spend the extra 10$ for that kind of performance.



Keep in mind though that it is the 1TB version that is being tested.



RAPID is in the next Samsung Magician update — any older Samsung drives can use it too. Mind you, if you have power outages or the like, you might want to think about this, as power failure could (will) corrupt data unless you have a UPS to give you a few extra milliseconds.

The review of this drive over at TomsHardware is really good. They explain the stats at each capacity — there is an SLC cache in these drives that gets better the larger you go — so whereas with most Samsung drives, and the basic numbers you see here, you want to just go over 120GB, but if you move large files often you will want as large a drive as you can get — it keeps getting better (more SLC cache). Hopefully their next generation EVO drives will have the same size SLC cache on all drives.



you know- if this comes out and stays affordable i will finally make the plunge

however i doubt if it will, none of these are on newegg, the older models are still regular price

so it looks like they will come out priced a lot higher than advertised



they are not supposed to come out until August. :)


Insula Gilliganis

If I had known about this SSD two weeks ago when I predicted what Dream Machine 2013 would consist of (, I would have picked two of the 1TB models in RAID 0. I have a feeling you guys got a couple of these a month ago to test for fun and amusement, and somehow they ended up in DM 2013!!


Optimus Prime

I am so glad for this review. Is it compatible with Linux?



Yes, it would work with Linux. Samsung magician software, however, is not available for Linux.


Bullwinkle J Moose


Does that caching scheme give you a bigger performance boost on the older SATA 2 interface?

(Percentage wise)

How big is the improvement on SATA 2 vs SATA 3?

This sounds like it might be the number one upgrade for older systems as well



With #'s like that, I think you might finally be saturating Sata 2 my friend.

I can't remember the bandwidth #'s off the top of my head, so don't hold me to it.

Definitely not worth it to raid 0 these if you are on Sata 2.

I want two please! :D