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Samsung 2x4Gb Low Voltage DDR3 1600 kit (OCing to 2400+) Discussion - Page 61

post #601 of 1835
3/23/12 at 6:45pm
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Quote:
Originally Posted by ericeod View Post

I finally get to post some results! I am running VCSSA at 1.05v, so I didn't have to go to 1.10v for these modules to run at this speed.
I've gotten 32Gb (8x4Gb) of the Samsung 30nm modules stable at DDR3 1866 9-9-9-28 1T with 1.55v:
http://valid.canardpc.com/show_oc.php?id=2306851
2306851.png

Have you tried the same timings and clock speed with 4x4GiB? If so, how much DRAMV did you need? I know I need less than 1.35DRAMV and 1.05VCCIO to get 4x4GiB stable with your primary timings, and clock speed. So I thought it was strange you needed 1.55DRAMV, over more VCCIO.

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post #602 of 1835
3/23/12 at 9:01pm
so after upgrading from 4x2gb of elpida ddr3-1066 to 4x4gb of these samsungs, my boot time has increased....from 13 seconds to 18-20 seconds :/ twice the capacity and twice the speed too!
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post #603 of 1835
3/23/12 at 9:08pm
Quote:
Originally Posted by Jagged_Steel View Post

So what is the final verdict on using this Samsung in AMD rigs? I don't see anybody posting their specs in the AMD MaxxMemm page . From what I can glean from the few AMD users in this thread, this Samsung can run @ 1600 8-8-8-24 1.5 v with ease, but it has problems when trying to hit 7s? What kind of latency are people seeing with a rig similar to mine ? I have to go to town tonight (Phoenix) and I might just poke my head in Fry's. If I do, I might not be able to resist grabbing a set of these for $39.99. I have been thinking of doing a RAM upgrade for while now, but was hoping to get into some 7CL 1600 stuff. It is awful tempting to get 16 GB of this for the same price or less than 8 GB of some 1600 7 Cl.
Also, in the not so distant future I will be going FX (probably after Piledriver hits but ya never know) so the higher speeds (1866 CL8? drool.gif )with moderate timings will be more beneficial in that case than they will be to me with my current Phenom2 setup I guess. What say ye with AMD systems using this Samsung WonderMemory? Should I go for it? thinking.gif
Edit to add" @ihatelolcats: I see you have finally gotten your Samsung, and since your rig is as close to mine as I have seen using this memory, what results are you seeing? I see lots of Intel rigs getting down in the mid 40s for latency, I would be tickled pink if I could get down somewhere in the low 50s.With the best stable settings I can manage with my Corsair 4 GB (1626 8-8-8-24 1.7v NB 2448) is around 59 ns latency.

440
just got them tonight. having trouble going below cas8 using 1.45v
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post #604 of 1835
3/24/12 at 7:42am
Your numbers look great Ihatelolcats. You are running above 1700Mhz, so 8 CL isn't too shabby up in that range. I did get a set of these, you can see my numbers in the previous page. I can get 7CL, but it requires upping the voltage to 1.65 to be stable, and I am not comfortable running that high. It's ok for a quick MaxxMem run, but probably not long term. I have settled on running 1632 Mhz 8-8-8-17 1.35 volts and it is rock solid stable.I also tried setting the tRAS very low ( tCL+tRCD+1) and the tWCL to tCL-1 . I also set the tRC to 25 . It is recommended to be no lower than tRAS+tRP. These settings were per advice from cadaveca over at Tech Power Up. That guy knows his $^it when it comes to memory. I had never messed with timings other than the first four before, and I had always ran the tRP @ 2 x tCL + tRCD per some old advice, but it really can go as low as tCL+tRCD. cadaveca said a safe bet for stability is to go tCL+tRCD+1.

440402

These timings blow away what I could get with my 4 GB Corsair 2000 Mhz set. I might just grab another set of these this weekend if I go to town.
Edited by Jagged_Steel - 3/24/12 at 8:18am
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post #605 of 1835
3/24/12 at 8:20am
How does this look? No voltage adjustments. Went straight out with the Techpowerup reviewer's recommendations. One of the two for that matter. On my Maximus IV they can do 2133 at their default 11-11..

Trouble is i think this setting is beast for them. I can probably try for more aggressive timings too. Any opinions please chime in323
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post #606 of 1835
3/24/12 at 11:39am
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Quote:
Originally Posted by nawon72 View Post

Have you tried the same timings and clock speed with 4x4GiB? If so, how much DRAMV did you need? I know I need less than 1.35DRAMV and 1.05VCCIO to get 4x4GiB stable with your primary timings, and clock speed. So I thought it was strange you needed 1.55DRAMV, over more VCCIO.

More modules always makes it more challenging to OC. I was happy to get 1866 out of 8 modules. I will test lower voltage, but my last 3930k needed 1.55v, so thats what I dialed in. I will see if I can lower the voltage to the dimms and test again. I would like to get to at least 1.50v.
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post #607 of 1835
3/24/12 at 1:59pm
Quote:
Originally Posted by Jagged_Steel View Post

Your numbers look great Ihatelolcats. You are running above 1700Mhz, so 8 CL isn't too shabby up in that range. I did get a set of these, you can see my numbers in the previous page. I can get 7CL, but it requires upping the voltage to 1.65 to be stable, and I am not comfortable running that high. It's ok for a quick MaxxMem run, but probably not long term. I have settled on running 1632 Mhz 8-8-8-17 1.35 volts and it is rock solid stable.I also tried setting the tRAS very low ( tCL+tRCD+1) and the tWCL to tCL-1 . I also set the tRC to 25 . It is recommended to be no lower than tRAS+tRP. These settings were per advice from cadaveca over at Tech Power Up. That guy knows his $^it when it comes to memory. I had never messed with timings other than the first four before, and I had always ran the tRP @ 2 x tCL + tRCD per some old advice, but it really can go as low as tCL+tRCD. cadaveca said a safe bet for stability is to go tCL+tRCD+1.
440402
These timings blow away what I could get with my 4 GB Corsair 2000 Mhz set. I might just grab another set of these this weekend if I go to town.

good info...thanks
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post #608 of 1835
3/24/12 at 8:10pm
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post #609 of 1835
3/24/12 at 8:14pm
^^ Probably felt weird going in and out using those coupons. upsidedwnsmiley.gif
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post #610 of 1835
3/24/12 at 8:19pm
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Quote:
Originally Posted by mistax View Post

359

Did you use the Microcenter coupon 6 times?

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