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post #951 of 1055
Quote:
Originally Posted by ~kRon1k~ View Post

I'm running 1.655v. Any lower and there are stability issues.

1.655v is a lot more than i needed (i'm using 1.6 for my most aggressive oc when probably don't need to)
Quote:
Wow! Are these at stock voltage? I took them up to 2000 MHz but the performance increase was trivial.

Timings will automatically loosen as you increase frequency, you can manually set stuff like trfc. 128 trfc is a safe-ish bet - i'm using 104 right now @2200mhz, 1.6v. It helps for performance a lot.

Other than that, giving up timings for frequency can hurt. ~2133c9/2400c10 are good. 2133c10/2400c11 if you want low volts, maybe. I don't see a reason for that though, so oc ends up something like 2133c9, 2400c10, 2200c9 (i prefer last one as it benchmarks highest)
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post #952 of 1055
I dunno what Samsung was thinking, these were dirt cheap, I bet they were just showing off against Gskill.

Anyway, there is a difference if you look closely:





post #953 of 1055
and yet when they were 40 and could oc to 2133 cl9 they were the best, i personally like them
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post #954 of 1055
Quote:
Originally Posted by cab2 View Post

I dunno what Samsung was thinking, these were dirt cheap, I bet they were just showing off against Gskill.

Anyway, there is a difference if you look closely:






Great price/performance for the price when they were $40, although some of the mem kits people were replacing & selling off were even nicer for benching memory. Picked up a couple 1600Mhz 2 x 2Gb kits that can run 2400mhz c7 - c9 for under $10 around that time.

I generally run the Samsung HYKO kits at 2133 c9 at ~ 1.54V to 2400 c9 at ~ 1.67V for benchies

    
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post #955 of 1055
Quote:
Originally Posted by Cyro999 View Post

1.655v is a lot more than i needed (i'm using 1.6 for my most aggressive oc when probably don't need to)

I think AMD seems to need a little more volts to be stable at a certain speed than Intel setups.
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post #956 of 1055
I have 30nm Samsung Wonder RAM, 4x4GBs, but I don't over clock it yet.
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post #957 of 1055
Well, Samsung Wonder RAM wasn't available in my area. I picked up a relatively cheap 2133 c11 corsair kit, because it was actually cheaper than most 1866 c9 1.65v kits, and a little costlier than 1600 c9 kits.

This was the best I was able to achieve with this kit:

NM2l7R3.png

Its at 1.6v

The tRAS I believe, 30, I've tried 29, it hanged in hyperPI, so I kinda left it at 30.
One thing I noted, that dropping the tRFC from 283 ~ 313 (the kit defaults) to 213 (the lowest it can go) reduced my latency quite a bit.

Also, a relative chart of my experiments:
11-11-11-27-2T @ 2133Mhz -> 48.8ns (283 tRFC)
11-12-12-31-2T @ 2400Mhz -> 46.2ns (313 tRFC)
11-12-12-31-2T @ 2400Mhz -> 45.2ns (213 tRFC)
10-10-12-30-1T @ 2400Mhz -> 42.6ns (213 tRFC)

I've tried 2666mhz @ 12-14-14-36,
9-10-12-30 @ v1.65v
Both failed.

I think c9 2133mhz might be possible, but kinda want higher frequencies, lol.

Is this a good kit?
post #958 of 1055
Quote:
Originally Posted by i5-4670k View Post

Well, Samsung Wonder RAM wasn't available in my area. I picked up a relatively cheap 2133 c11 corsair kit, because it was actually cheaper than most 1866 c9 1.65v kits, and a little costlier than 1600 c9 kits.

This was the best I was able to achieve with this kit:

NM2l7R3.png

Its at 1.6v

The tRAS I believe, 30, I've tried 29, it hanged in hyperPI, so I kinda left it at 30.
One thing I noted, that dropping the tRFC from 283 ~ 313 (the kit defaults) to 213 (the lowest it can go) reduced my latency quite a bit.

Also, a relative chart of my experiments:
11-11-11-27-2T @ 2133Mhz -> 48.8ns (283 tRFC)
11-12-12-31-2T @ 2400Mhz -> 46.2ns (313 tRFC)
11-12-12-31-2T @ 2400Mhz -> 45.2ns (213 tRFC)
10-10-12-30-1T @ 2400Mhz -> 42.6ns (213 tRFC)

I've tried 2666mhz @ 12-14-14-36,
9-10-12-30 @ v1.65v
Both failed.

I think c9 2133mhz might be possible, but kinda want higher frequencies, lol.

Is this a good kit?

Looks pretty good to me

Did you try 2200 at for example 9-10-12-30-1t? I played with 2133c9 / 2400c10 and then ultimately pushed to 2200@9 and it was better performing
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post #959 of 1055
2200, there isn't any 22.0x multiplier

I'll have to OC the fsb to 103.15 to reach 2200, and well, that could create other problems, though I could give it a shot.
post #960 of 1055
Quote:
Originally Posted by i5-4670k View Post

2200, there isn't any 22.0x multiplier

I'll have to OC the fsb to 103.15 to reach 2200, and well, that could create other problems, though I could give it a shot.

Aha, scratch that then, probably not worth for you. I could just get better perf with 2200c9 than with 2133c9/2400c10 and was able to nudge up to it, though it's of course marginal with RAM and i had 22x multi i assume (as i'm running 100.01 base clock and 2200mhz RAM on my 4770k+ud3h)
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