Samsung 840 evo 120gb low speeds!

Kostas Sar · Mar 19, 2014

Hello everyone,

I just got an SSD (samsung 840 evo 120gb).
After installing Samsung magician software and enabling everything on my computer that could boost its performance (sata 3, AHCI mode and Rapid Mode) i got awful results! Around 150mb/s read and 280mb/s write.

PC specs:

Windows 8 pro x64
Intel i5 760
Asrock p55 extreme4.
Samsung 840 EVO 120GB SSD
3 more sata III HDDs
4GB RAM
AMD Radeon 6870

Any suggestions?!!

Thank you in advance.

dustinhunt78 · Mar 19, 2014

I see this almost every day in the forum. Ok.....the performance numbers that they advertise are given in a PERFECT, controlled in every way to optimize the speed of the SSD's way. You, me or the Dhali Lama won't ever get those numbers in real world computing. I know.....you wanted to see the numbers through the roof. I felt the same way. LOL BUT.....that's how it is.

dustinhunt78 · Mar 19, 2014

One more thing to point out......look at the chart where it says "Up to 540" or "Up to 410". It's giving the absolute most in a perfect environment, but you'll never see it.

Freakboi_pa · Mar 19, 2014

When you say you enabled RAID mode, what are you RAIDing this with?
Make sure you have the drive connected to one of the white SATA ports, not the blue.

Memhorder · Mar 19, 2014

No no that looks low here's mine and look at the difference. awww need know how to upload pics lol

dustinhunt78 · Mar 19, 2014

Memhorder :

Look where?

And I can tell you the difference in yours and his right off the bat. Look at your CPU. Look at his. You're running something with a benchmark dang near 10,000! LOL I would HOPE that it is capable of faster speeds in reading/writing. His CPU isn't capable of pushing the SSD to it's limit. It is bottlenecked performance.

Freakboi_pa · Mar 19, 2014

Actually, the CPU has little to do with transfer speeds. The southbridge controller handles all the data passed to and from the hard drives. See diagram http://en.wikipedia.org/wiki/Northbridge_(computing)

Kostas Sar · Mar 19, 2014

Freakboi_pa :

I said Rapid mode, from the samsung magician software, not raid.

dustinhunt78 · Mar 19, 2014

Freakboi_pa :

His technology is several years old now. Yours is new. New processor, new chipset on the motherboard, new controller, new EVERYTHING. 3 years is FOREVER in computer terms. What was state of the art then is so so now.

Kostas Sar · Mar 19, 2014

dustinhunt78 :

I wish it wasn't a problem (that way i wouldn't mind that much) but a friend of mine with the same ssd gets way better results...and i'm talking like double speed from my results...

Memhorder · Mar 19, 2014

dustinhunt78 :

Ahh yes you have a valid point. I gotta figure out how to upload lol.

dustinhunt78 · Mar 19, 2014

Kostas Sar :

I'm guessing that his entire system is newer/more powerful. I bet that I could plug that same SSD into my desktop (the parts for it are listed in my "signature" at the bottom of all my posts) and get double what you're getting. But my system is brand new with the latest, greatest CPU/chipset/controller.

dustinhunt78 · Mar 19, 2014

Read this article. It should solve your doubts:

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCoQFjAA&url=http%3A%2F%2Fh20564.www2.hp.com%2Fbc%2Fdocs%2Fsupport%2FSupportManual%2Fc03336018%2Fc03336018.pdf&ei=RCYqU6LJN5On0gG414CYDA&usg=AFQjCNGeYXGvTPhuJmgPqyWrjSMz4tylXw&sig2=knTTyCMYzb0lHBbPvrTIHg&bvm=bv.62922401,d.dmQ

Memhorder · Mar 19, 2014

Did you enable the Over Provisioning? That helps

Freakboi_pa · Mar 19, 2014

They have been using the Northbridge and Southbridge chipsets since Pentium 4 days.

Kostas Sar · Mar 19, 2014

Memhorder :

Yes, it is enabled

Memhorder · Mar 19, 2014

https://imageshack.com/i/0sdpulp

Memhorder · Mar 19, 2014

Well all I can say is that you are getting substantial performance from it still. My HDD only Reads 85 and writes 48 so huge

dustinhunt78 · Mar 19, 2014

Memhorder :

That is a good point. And you're not alone in those numbers. I'll bet that 85 to 90 percent of computers with HDD's are getting no better. Maybe a higher number than that! The bottom line is SSD's are faster. MUCH faster.

popatim · Mar 19, 2014

The problem has nothing to do with his cpu and everything to do with his motherboard. The marvell 912x sata3 controller cannot actually handle sata3 speeds. Move the ssd to one of the intel sata2 ports for best performance.

Theres quite a bit more mis-information in this thread.
- Intel does not use Northbridge/southbridge and hasn't in years. I think core2 was the last one to use it.
- Sequential read/write speeds are mostly useless to typical users & gamers. Its the random and access times where you get the most out of your drives. Toms SSD raid article should be proof enough of that.
- and as already stated by Freakboi, the cpu has little to do with drive I/O and everything to do with the chipset.

Memhorder · Mar 19, 2014

If Sequetial Read/Write wasn't all that important then why wouldn't Companies base their specs on Random. 94000 MB sounds a lot better than 540.
They are equally important. Hey Kostas. Did you by any chance install Windows while the BIOS settings were set to IDE or AHCI? Did you migrate Windows from a HDD?

Kostas Sar · Mar 20, 2014

popatim :

You were right! Moved my ssd to one the sata 2 ports and got way better results.

Thank you!

Memhorder · Mar 20, 2014

Good show! Good thinking popatim. How much gain did you get Kostas? Can you post results?

popatim · Mar 20, 2014

Memhorder - random reads are the slowest and thus the worst thing an advertiser wants to use.

840 pro (not mine)

but still way faster than any HDD. Below is a Seagate 3tb barracuda, one of the fastest 7200rpm drives made.

CDM-Seagate-Barracuda-XT-3TB-Hard-Drive-ST33000651AS.png

@ Kostas Sar - Your Welcome.

Memhorder · Mar 20, 2014

Yeah sorry popatim for doubting you. I wasn't paying attention. The Sequential R/W are in MB/s and the Random is IOPS. My mistake. Glad you caught this because I thought Kostas Sar was reaping all the benefits he could get out of his SSD. They still were higher than HDD. Good job!

Samsung 840 evo 120gb low speeds!

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