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C300 speeds dropped dramatically, why?

post #1 of 12
Thread Starter 
Hey guys, I got a C300 128GB a week or two ago and was getting speeds that I was happy with (reads of ~250Mbps) and for some reason they have dropped to almost half of what they were a few days ago.

I have installed a couple games onto the drive and applied a small OC on the CPU (2.1 -> 2.63Ghz) and now I am seeing read speeds that won't break 140Mbps. I haven't changed any drivers or configurations on my system and I'm pretty confused as to why this has happened. If anyone can offer suggestions I would greatly appreciate it.

I did test the speeds once after applying the OC and saw that they were still in an acceptable range a few days ago so I don't think that would be the issue. I can't think of any explanation for this performance loss unless having more data on the drive can almost cut speeds in half?
Edited by Degausser - 2/24/11 at 6:14am
Degausser
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Degausser
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post #2 of 12
If you fill th drive it can slow to a crawl (like any HDD for that matter).

Post how much % of free space do you have and check if TRIM is enabled.
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post #3 of 12
Thread Starter 
My drive is almost exactly 50% filled, it's at 60.7/119GB free. I do have TRIM enabled though I just realized that the nForce drivers for my board probably don't actually support it. I've uninstalled them through the device manager but AS SSD still tells me that the nvidia drivers are being used, not the MS ones. Specifically the nVidia one is calle nvstor and I should be using msahci, correct?

I'm going to run driver sweeper real quick and see if that helps anything.
Degausser
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Degausser
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post #4 of 12
Thread Starter 
Well, after running driver sweeper and restarting the system I got stuck in and infinite BSOD loop that would occur when trying to boot into windows.

I did a fresh install and my speeds were right where they should be directly after installing only windows and AS SSD. Now that I've gotten some other programs and COD: Black Ops installed my speeds have dropped down to super low rates again.

I haven't installed any nvidia drivers except my display ones but for some reason I cannot get AS SSD to show that I'm using the msachi drivers. My device manager doesn't show any nvidia drivers at all. I'm thinking this is the problem because I doubt that the nvidia drivers will allow TRIM commands to be executed which is why I'm losing performance.

Here is my AS SSD benchmark from just now.


And this one is from exactly a week ago, shortly after I received my drive and did my first Win7 install on it.


In the second picture I had installed nVidia's drivers.

If anyone could shed some light on this subject I would be really grateful, thanks.
Degausser
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Degausser
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post #5 of 12
Use ATTO benchmark and see if the values are more like they should be cause CDM sucks in benching SSD's as well as AS SSD Bench. Then make sure you are on AHCI and have the latest AHCI drivers installed, run a CCleaner reboot and run ATTO and see how it goes
post #6 of 12
Thread Starter 
Alright, here is my ATTO bench after running CCcleaner and rebooting.



I'm capping out at almost exactly 140Mbps

This one is from a week ago.



ACHI is enabled in the BIOS and in Windows. I just did a fresh install of Windows about 2 hours ago and I have not installed any chipset drivers for my motherboard so I should be using the default Microsoft storage driver, it says I am in the device manager. The only thing that messes with my head is that AS SSD displays my storage driver as an nvidia one, I don't get it.

Also confusing is that right after I did the fresh install of Win7 this morning I checked and was getting 250+ Mbps read speeds but since installing other programs and such it drops to where I am at now.

EDIT: Thank you for your help by the way guys, I do appreciate it.
Degausser
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Degausser
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post #7 of 12
Do Crucial drives have the built in "throttle" that Sandforce drives have, if you write too much too fast?

This is sticky right on the OCZ Sandforce forum.

Here is what you should NOT do with a brand new sandforce based SSD drive

1 Buy a new drive...install it, do NOT note what Firmware is on the drive.

2 Immediately flash the drive to a new FW...you do this even though you have no idea what was already on the drive.

3 Now...run ATTO, followed by CDM (twice) and 2 runs of AS-SSD...so now you have induced a lifetime write throttle which has slowed down the drive anyway as you just wrote over 70GB worth of data in under 5 minutes. This will last for 5 maybe 7 days....it all depends on how much panicking you do over that 5 day period and how many more benchmarks you run.
    
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post #8 of 12
Thread Starter 
That's a good idea actually. I have no idea, can anyone else confirm it for us?

I'm currently going to do a sanitary erase on the drive because I've seen it recommended for every time you install a fresh OS on an SSD and I haven't done it yet.

But yeah, about the throttling thing I would love to hear from someone who knows.
Degausser
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Crucial C300 128GB & Samsung Spinpoint F3 1TB Windows 7 Home 64 bit Logitech G15 Corsair HX620 
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Degausser
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Crucial C300 128GB & Samsung Spinpoint F3 1TB Windows 7 Home 64 bit Logitech G15 Corsair HX620 
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post #9 of 12
It may just be a Sandforce thing, but OCZ recommends 3 full reboots after installing Windows and its updates. Maybe try it. I dont know.
    
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post #10 of 12
Well depends on how long you;ve had the ssd for, if its a while might be best to upgrade the firmware, otherwise you might already have the current firmware if you bought it recently.

I seem to remember some SSd drives will activate TRIM if you leave it at the windows 7 screen login for a while, might be good idea to check and see if your drive has this feature.
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