maybe you should check if it is possible to return them to the seller.

your last statement is what i bet on. it has happened before (e.g. previous sandisk's incident).

no.. i mean there are many users of 840 evo. samsung must do something to control the damage asap, or their sales of this tlc ssd will be in trouble.

oh. yeah half-sized msata ssd is rare :/ this is why i think it's important to check the internals before new purchase, so as to prevent getting this kind of upgrade inconvenience.

exactly what wildwestgoh said.

i believe it's too early to conclude that this is an issue with tlc chip.

mlc chips have been used in many ssd's that we can find today. it should be relatively more stable. (although i am not sure if the recent shrinking of dies can cause any side effects)

if you searched through results regarding samsung tlc drives getting slow with time at google, you will find that similar issues (slow drives) were reported as early as 840, but no one by then realized that this was related to the age of files, i.e. the most recent finding that can be reproduced. (and most of the questions were tagged as solved) by the way, ssd's do get slower with time. normally people will do a secure erase to regain the speed.

this is a problem with new technologies. when you adopted new technologies, it requires time to prove that it is ok, or not. time is what we don't have, especially for techs like ssd that is still in active development. (bu at the same time people are so eager to own one)

if you think it's risky, you should get old drives that are proven to still work until today. (850 pro also uses new technologies, even if it comes with 10-year warranty)

no, you lose nothing if you make system images and data backups before doing secure erase. it's not like you need to do it every 12 months.

until today, other ssd's in my machines (1 to 2 years+) are still running with good speed imo (350 to 450+ MB/s). i will only do so when they are below 300MB/s.

yes that's the scenario. perhaps that's also why no one noticed the particular case of 840 evo until recently.

you have ample of time to review your options. there are still many alternatives out there if you can't wait hehe.

oh :/

yeah most manufacturers only tell you generic things, like your laptop can fit msata ssd. what they don't tell you is that you need a particular type for your laptop, while there are many form factors for msata ssds. (this has happened before. everyone in a forum who owned asus g46 bought full-sized msata ssd's for upgrades, but later found out that they actually needed the half-sized one. eventually they did all sorts of things, including taping the msata ssd to the laptop in order to secure and use it)

referring to the 3rd image in your post, the size of your ssd should be like the wifi card (intel) just above the msata slot.

i think you should also mention your laptop model.

yes, i have 2x 500gb 840 evo in one of my laptops. i will use defrag to solve its slow drive issues when necessary, until there is a proper fix.

no, for ssd's that behave normally, you do that when you think the ssd's are slow.

i have repeated for some times regarding the defrag method (only if there is no official fix, and your drives are becoming really slow). if this is a thread that is eligible for post counts i might offend some rules. please, it's time for you to pick them up.

yeah it will not work for your laptop. if you don't wanna sell it, an option for you is to get an adapter and use it as storage.

right however, if possible dig a little deeper when you can. there are many known secrets. only for those who do just that hehe

great

many people are taking shortcuts just to ask for suggestions here. i understand to them it's all about budget. i just hope they don't swallow everything blindly.

in my case the defrag method brought back the normal speed. note that there will not be a 100% speed recovery.

forget about those marketing numbers. they are true only when the drives are fresh. in real world usage, it's the speed in steady state that matters.

This post has been edited by horns: Sep 15 2014, 11:19 PM

yeah about reviews, they are written by knowledgeable tech guys, hence they're good as reference. however i have the impression that they only cover part of the whole story. (normally the positive part) that's why i think we need to dig deeper for more information to make better justifications hehe

right now it should be pcie based nvme ssd, examples are intel dc p3500/p3600/p3700, targeted at enterprise space.

we all know common ssd's these days are based on sata, a technology optimized for hdd (in consumer market sas and fiber channel are not common). now most sata ssd have reached speed limit. in order to break that limit certain sata ssd's offer ram-based caching. (which rely on system ram to boost its speed further; not ideal but enough to make someone happy. it's a cheap 'solution' without rising the price of ssd's).

however in terms of raw speed, ssd's need a technology optimized just for them to run better. that technology is nvme. as of now, nvme ssd's run at minimum 4x sata3 speed. if you care to know, w8.1 has native support already.

pcie based ssd have been in the consumer market for a while. (either in the form of bare m.2, or comes with pcie adapter. one example is plextor m6e). however most of them only use pcie x2, which translate to about read speed of 700MB/s. the top m.2 pcie ssd that i know of is samsung xp941 (which uses pcie x4, read speed is over 1GB/s).

now the ugly part: many told us that these m.2 ssd's are great at speed. not many told the story that with the speed it comes with heat problem, and the current packaging does not take care of this. for instance, xp941 directly connected to m.2 slot can reach more than 100c in minutes just by simple large file transfers. (the source of heat is from its controller, not nand flash. maybe this was why no thermal sensor was deployed on xp941). so, a more practical and safer packaging for these m.2 ssd's is to mount them to an pcie adapter with heatsink contacting the ssd directly. (of course if you run it as boot drive the temperature might not be as high. again, better safe than sorry)

hehe what made you think i am not there?

i know. as i mentioned before, the issue is 840/evo specific.

i have 840 pro. they don't have such issues. (the same goes to samsung 830, sm841, sm843, sm843t, and xp941 if you care. i haven't started using 850 pro so i have no comment on that)

i know it's frustrating to get news like this. there is no need to be so panic until losing all your coolness :/

yeah.. warranty is always the main risk to take when you get imported units from sites like Amazon. it's true you save some bucks at the beginning. however i still think sacrificing warranty is a wrong move and not worth the so-called savings, without backup plans that work. (well, unless you are willing to take all associated risks hehe)

this is why imo it's cool to pay a bit extra to get local units for warranty's sake. local units are overpriced? maybe you should think again.

no. xp941 is not affected.

yes, samsung xp 951 is client nvme ssd that is on the way. (again it should be for oem channel) there is no need for air conditioners lol; a m.2-to-pcie adapter with a heat sink is good enough to bring down the temperature to much safer range (55c+) at room temperature.

for samsung 840/840 evo users, this is an updated version of filebench (005a): https://db.tt/QOCTdRFG

source: http://www.overclock.net/t/1507897/samsung...0#post_22867033

this one comes with the rewrite feature. use at your own risks. (safety note: back up you data first before use!)

intel 530? it's the only performance ssd with 5 years of warranty.

old doesn't mean bad. old always means either good or bad records that you can look up on the internet. also, sata ssd's a year ago almost reach the top sata speed already. i think intel 530 is 1 year newer than hyperx 3k.

raid 1 is about read performance and data redundancy only. write speed is about the same as a single disk. maybe you don't need that.

finally, samsung responded to the collective ranting.

http://www.anandtech.com/show/8550/samsung...x-is-on-the-way

so far, samsung responded relatively more promptly than sandisk. (in the previous case, iinm kingston was the first one to release sandforce-related firmware fix) still, we will see if the fix works well.

edit: new filebench (007a): https://db.tt/rwAC7kpl

source: http://www.overclock.net/t/1507897/samsung...0#post_22887168

This post has been edited by horns: Sep 23 2014, 09:50 AM

it depends on how you view the incident. imo the bottom line is to just grab what you want and have fun with it.

by the way, kingston ssd's (older models) were still one of the least problematic after purchase, according to the recent hardware failure rate report.

nice it's too bad my xps cannot make raid.

maybe you should try ask viewnet and see if they can give you a proper contact. or, you can try your luck at mushkin support website.