ALL with SSDs read this for a boost in performance

TheMorningStar · 19 Aug 2011 at 17:27

My SSD performance on my M3A79-T seemed low after some research disabling C1E in bios seems to have brought it up a fair bit, even above reviews on better MOBOs in some instances.

I have an AMD SB750 chipset, but this may help with others.

Give it a try and post your before/afters .. FOR SCIENCE!

I made other changes but I believe this to be the cause, will track down the other changes if need be.

I know of no issues with disabling this but if anyone does please enlighten me. From what I know It is simply power scheme management.

with C1E (hd tune pro)
Access time upto and beyond .563ms
Peak 174MBps
Burst 161MBps

Without
Access time .144ms
Peak 211MBps
Burst 190MBps

IOPS Is also way up but also much more stable too (so far) try this for yourself as I didn't take to much note but im consistently over 6k when i was anywhere between 1-5k before. (hd tune pro - extra tests)

I hope this helps a few of you as i was getting a little disappointed with my SSD but now I'm all like "HELL YEAH" even if I am still on sata2

TheMorningStar · 20 Aug 2011 at 18:32

No one trying this and posting back?

It really is a quite nifty tweak.

Philtor · 20 Aug 2011 at 18:44

There's no need to do this tweak. If you think it works then bench your drive before and after, then report back.

prt · 20 Aug 2011 at 20:37

If it works for you all well and good

it makes mine worse on parts of the score, so of course i turned it back on.
always worth a small test

Orcvader · 20 Aug 2011 at 20:41

No difference for me...

.

TheMorningStar · 20 Aug 2011 at 23:06

The chipset and SSD could be a variable. Perhaps AMD systems such as mine are more susceptible to this tweak.

Art · 21 Aug 2011 at 09:47

I'm also running an SB750 system, with a Kingston SSDNow V+ 64GB SSD.

C1E on:
Minimum transfer rate = 111.2 MS/s
Max = 176.9MB/s
Avg = 160.1 MB/s
Burst = 137.5 MB/s
Access Time = 0.2ms

C1E off:
Minimum transfer rate = 116.4 MS/s [+4.7%]
Max = 207.0MB/s [+17.0%]
Avg = 184.5 MB/s [+15.2%]
Burst = 185.1 MB/s [+34.6%]
Access Time = 0.1ms

(HD Tune 2.55 free version)

The numbers look good, but I don't think I've actually noticed a difference in day-to-day use yet. I'll keep it off for a while, and maybe switch it back on if I don't spot any differences.

ginjaninja · 21 Aug 2011 at 11:09

For those with different hardware,
why do you think this setting is relevant for you and how might it translate to other rigs.
thanks

TheMorningStar · 22 Aug 2011 at 03:00

Thanks for the numbers Art, pretty much what I saw

ginjaninja said:
For those with different hardware,
why do you think this setting is relevant for you and how might it translate to other rigs.
thanks

Well that's what I'm interested in seeing. On AMD systems at least SSDs seem quite sensitive to power scheme management, There is also quite a difference if CnQ is enabled, with my testing anyway, I would quite like to test my ssd with a t1100 clocked around 4ghz to see if the performance gap with intel could close up a bit... or test a force 3 ssd on a core2 rather than the mega machines that the review sites are testing with.

Broken Hope · 22 Aug 2011 at 10:43

Power saving does make a difference with SSD speed, though on mine it's mainly the 4K benchmark and I've managed to come up with a combination that gives me almost full performance with most of the power saving enabled.

For people trying to rubbish the OP try reading this.

http://www.tomshardware.co.uk/ssd-hdd-power,review-31532.html

I see the exact same issues on my Gigabyte board when I enable all the C states in the BIOS, my 4K reading drops from 21-23MB/s down to around 14MB/s

prt · 22 Aug 2011 at 22:39

not trying to rubbish the op, only stating a fact that it had the opposite effect on my system.