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840 Pro with 290 MB/s Write speeds.... Confused as heck - Page 2

post #11 of 19
Thread Starter 

Hi KPO.

I followed those exact instructions, and my data box showed a 0 (changed it earlier today) and still doesn't show AHCI enabled. Odd? However, when I enabled the Marvel as AHCI in Bios I get BSOD.
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post #12 of 19
Thread Starter 
So very strange.

Went back in and tried the BIOS again and it worked. Install new Marvell drivers and all is well. Speeds are much better, in the 370's, but I'll try SATA 2 now.
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post #13 of 19
Unless you have more modern SSDs than you have Intel SATA 6.0Gbps ports, you should never plug them into anything else.

Marvell's and several other budget 3rd party SATA 6.0Gbps controllers are often slower in practical use than Intel's integrated 3.0Gbps ports.

Also, hammering most SSDs with tons of write benchmarks in a short period of time may temporarily reduce performance.
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post #14 of 19
Thread Starter 
Alright guys, let me know what you think.

On the left is Marvell SATA III and Intel SATA II on the right.

Is the Seq Read as important? I'm noticing everything else is higher on the Intel except for that, so I'm assuming I should stick with Intel? Gotta say, I'm bummed that I'm only receiving half the speed benefits. I should have bought a different SSD I'm assuming if I'm onyl recieving half the speeds. Are there any PCI-e adapters worth looking at?

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post #15 of 19
Punker1234 the Asus Rampage III Formula motherboard uses the Marvell 9128 controller to provide third party SATA3. Unfortunately the 9128 controller only uses one PCIe lane (max of approx 380mb/sec) so is not capable of providing full SATA3 performance. Some of the higher end X58 motherboards used a Marvell 9182 which uses two PCIe lanes and this was a much better controller capable of passing trim with msahci drivers.

Also there is some debate about the Marvel 9128 controller supporting trim support. The Marvell drivers definitely do not support trim (but they do allow hotswap). The windows 7 built in msahci drivers provide trim support and the 9128 controller might pass the trim command (but the msahci drivers do not allow hotswap).

The bottom line is the 9128 controller is pretty much a lame duck and you would be much better off with the Intel SATA2 controller which passes trim and allows hotswap. The 4K figures are the most important for PC's running applications typically used by a home computer.
Edited by EasterEEL - 8/22/13 at 12:06pm
    
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post #16 of 19
go with the port that gives you higher 4k speeds. i choose to run my 840 pro on intel sata 2. windows "runs" faster with higher 4k speeds some guy at this forum told me.
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post #17 of 19
Use the Intel ports.
Quote:
Originally Posted by Punker1234 View Post

Are there any PCI-e adapters worth looking at?

The only PCI-E adapters that are faster than your Intel ports cost more than your motherboard.
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post #18 of 19
Quote:
Originally Posted by Punker1234 View Post

Alright guys, let me know what you think.

On the left is Marvell SATA III and Intel SATA II on the right.

Is the Seq Read as important? I'm noticing everything else is higher on the Intel except for that, so I'm assuming I should stick with Intel? Gotta say, I'm bummed that I'm only receiving half the speed benefits. I should have bought a different SSD I'm assuming if I'm onyl recieving half the speeds. Are there any PCI-e adapters worth looking at?


It's no comparison. Without a doubt use the Sata 2 ports. Seq Read/Write means almost nothing when you are already that fast.
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post #19 of 19
Thread Starter 
Got it. That solves that smile.gif

Well, looks like I should have done some mild research before diving in and purchasing, but lesson learned and I did learn quite a bit today. Thanks for your input everyone, I appreciate the help immensely!
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