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Samsung 840 or Sandisk Extreme?

Discussion in 'Solid State Drives (SSDs) and Flash Storage' started by anirbanhere, Mar 21, 2013.

  1. anirbanhere

    anirbanhere Notebook Enthusiast

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    I want to buy 120 GB SSD around 100$ and currently I see samsung 840 (non pro) and sandisk extreme for about 100$ (except OCZ). Which one will be good to buy?
     
  2. TheBlackIdentity

    TheBlackIdentity Notebook Evangelist

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    The samsung is pretty awesome. I'd say go with that. It has extremely fast read and decent write speeds. Great for general use.
     
  3. davidricardo86

    davidricardo86 Notebook Deity

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    Samsung 840
     
  4. anirbanhere

    anirbanhere Notebook Enthusiast

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    Thank for reply, but according to benchmarks isn't sandisk faster? Also read that samsung 840 does not use MLC chips? howz that gonna make a difference?
     
  5. TheBlackIdentity

    TheBlackIdentity Notebook Evangelist

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    The Samsung uses TLC nand and the sandisk uses MLC. TLC nand only effects write performance but I doubt you'll be doing any write heavy stuff.. Go with the Samsung. Personally I wouldn't buy any ssd brand other than samsung or intel. Both have great track records and are regarded as the two most reliable brands. Forget the sandisk!
     
  6. tilleroftheearth

    tilleroftheearth Wisdom listens quietly...

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    Don't listen to anyone above, 128GB SSD's are a poor choice at this time.

    Samsung especially makes a very laggy/stuttering version.

    See:
    Samsung 840 Pro 512GB SSD Review :: TweakTown




    While I won't go so far as to recommend a Vector (as in the quote above...), I would pick an M4 256GB (Crucial) or a Sandisk Extreme 240GB SSD over either of your options above.


    Simply put: anything smaller than 240/256GB is asking for (performance) trouble - whether you write 'a lot' to it or not.

    Yeah; overall 'performance' lower than HDD based systems in some cases...


    Good luck.
     
  7. anirbanhere

    anirbanhere Notebook Enthusiast

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    120 GB will meet my requirements pretty easily, It says that in 128 GB class vector is winner. I read somewhere that vector underperforms when above 50% full.
     
  8. Marksman30k

    Marksman30k Notebook Deity

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    I did this research a while ago except I was looking for a 256gb drive. The situation with the vector is really complex. From what i could gather from the OCZ forums it has really aggressive garbage collection that specially kicks in when 50-75 percent (depending on firmware) of all NAND on the drive has been used, during the collection period is when you will notice the performance drop. However things go back to normal after.

    TLC Nand has a penalty to access times and for some reason, plus the TLC drives seem to need a much larger reserve Nand pool to maintain smooth performance. I believe this is because the 840 has much more conservative garbage collection imposed by samsung to reduce the Write Amplification on the relatively fragile TLC NAND.

    Likewise, the vector is difficult to recommend for a laptop due to its high idle power consumption.

    The crucial drives are solid all round performers though consider the Plextor m5s which uses the same controller but is tuned for faster random reads (I. E. The better system responsiveness) at the cost of lower random writes.

    You always have to be wary of Sandforce drives in that their incompressible speeds suffer greatly vs their compressible speeds. The high compressible speeds used to be a big thing when most other controllers had difficulty breaching 500mb/s but nowadays it seems very moot. Furthermore, they are very intolerant when fully filled up (which is very likely due to the small 120gb capacity) with regards to garbage collection. Simply because of the performance superiority of the Samsung 840 or the brute reliability of the Crucial drives am hesitant to recommend the Sandisk Extreme. The drawbacks of TLC NAND seem preferable compared to the caveats of Sandforce. As a final note, Sandforce extreme drives have had issues with non-working TRIM in the past. I'm not certain if it has been resolved.

    Essentially, this would be my summary of the 120-128gb SSD market:
    1. Samsung 840 pro: High power efficiency coupled with excellent all round read performance (for a snappy desktop and fast boot times) very jack of all trades
    2. OCZ Vector: one of the fastest possible SSDs when it comes to write speeds, very competitive read speeds but lower power efficiency
    3. Crucial m4: very well proven, not absolutely the fastest but very reliable
    4. Plextor M5s: cheap, same controller and NAND as the M4, tuned for fast Random Read at the cost of lower Random Write performance. I can personally confirm that DIPM works for this drive so it consumes <0.3W at idle
    5. Samsung 840: excellent read speeds, poor write speeds, conservative garbage collection leads to wild fluctuations in performance, cheap and very good power efficiency. Biggest drawback is the questionable lifespan of the TLC NAND with heavy writes
     
  9. Link4

    Link4 Notebook Evangelist

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    I wouldn't give recommendation for either of those two SSDs since I havn't used them, but I know that while the 128GB Samsung 840 Pro performs similarly to the 256GB and 512GB models when less than halfway full that is not the case with the 120GB 840. Not only is the 250GB 840 slower than the 128GB 840 Pro, but the 120GB 840 is even slower. It's write speeds are over 2X slower than the 128GB 840 Pro. Just the OS and a few programs are going to saturate more than half of the 120GB 840 and turn a slow SSD even slower.
    You can sometimes find the 250GB 840 on sale for $150 with no Tax on Tigerdirect, so get that if you find one on at that price, or just get the 840 Pro.
    As for the Sandisk Extreme I don't know much about it other than it being a low cost solution for OEMs and being a relatively slow SSD.
     
  10. Captmario

    Captmario Notebook Consultant

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    i have a question, if i have Samsung 840 as my OS drive with some programs ( abit less then halfway full ) will it really slow down alot? i mean even slower then HDD as said above? Any more details on this can be useful, please suggest as i am planning to buy one 120gb 840 just for OS not storage, so it will be less then halfway full
     
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