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Can't get ram to run at 1866.

post #1 of 12
Thread Starter 
I'm working with a GIGABYTE GA-870A-UD3 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard. (And a AMD Phenom II X4 955 Black Edition. And an entry level Radeon HD 5570 1GB video card.) The ram description on the mother board says:

"DDR3 1866(OC)/1333/1066 *To reach DDR3 1866MHz or above, you must install two memory modules and install them in the DDR3_3 and DDR3_4 memory sockets."

I have tried getting the ram to run at 1866 with no success. First of all I've tried it in what the mobo documentation calls socket 3 and 4. And what CPUZ sees as 3 and 4. Which is different. Both run at 1600.

I've also tried changing the mulitplier. But it only goes up to 8x equalling 1600.

I've contacted Gigabyte. They said it was my problem. And that I had to overclock it at my own risk. Nice huh?

I've also have the most current version of the bios installed.

How can I get this ram to run at the advertised 1866?
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post #2 of 12
Err the motherboard only supports 1866mhz when the RAM is overclocked. So Gigabyte is completely in the right. Though it's hard enough getting RAM to run at 1600mhz with a Phenom II, I would probably just leave it how it is.
 
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post #3 of 12
You need to oc the whole to oc the ram to 1866 and you need a CPU-NB close to 2800.
Example and near stock speed.
CPU : X14 3.26ghz
FBS : 233
CPU/NB : x12 2796
CPU/NB Voltage 1.4-1.50v
HT : x8 1864 or x9 2097
Ram Mulitplier : x8 1866mhz
Edited by dixson01974 - 5/28/11 at 1:41pm
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post #4 of 12
Thread Starter 
Maybe I'll just leave it alone. Would the fact that the ram was optomized for Intel be part of the problem. I'm just wondering if I switched to non specific ram if that would change the problem.

I think I'll just leave it alone. And be glad I got 1600 without overclocking anything.
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post #5 of 12
Quote:
Originally Posted by moab View Post
Maybe I'll just leave it alone. Would the fact that the ram was optomized for Intel be part of the problem. I'm just wondering if I switched to non specific ram if that would change the problem.

I think I'll just leave it alone. And be glad I got 1600 without overclocking anything.
Optomized for Intel or Design for Intel is a marketing thing. Look up G.Skill ECO and then look at my sig rig. I have G.Skill ECOs.
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post #6 of 12
like dixson01974 said, you need to up the 'cpu frequency' from 200 to 233 or even higher to get your ram frequency up, but it's gonna cause instability to your overall system which takes a bit of messing about with voltages and stability tests to fix.

1600mhz is plenty anyway, tighten the timings, you should be good to go.
post #7 of 12
Thread Starter 
Thanks so much guys. At least this is an answer. I can live with the 1600. It runs fine. And at least now I can stop hunting for a solution. LOL!!!!! This has been driving me nuts.

Kind of ****ty marketing on Gigabytes part though.
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post #8 of 12
Quote:
Originally Posted by moab View Post
Thanks so much guys. At least this is an answer. I can live with the 1600. It runs fine. And at least now I can stop hunting for a solution. LOL!!!!! This has been driving me nuts.

Kind of ****ty marketing on Gigabytes part though.
Gigabyte didn't screw up on there marketing. That is what 1866(oc) mean. Hell 1600 is ocing on any AMD and Intel out on the market today. Officially AMD and Intel only support DDR 3 1333.
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post #9 of 12
Here is a handy chart showing how increasing the "reference clock/cpu frequency/FSB" will affect the other parts of the system http://www.overclock.net/amd-cpus/59...ram-chart.html.

Good luck

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post #10 of 12
Though anything above 1333 is an OC, AMD platforms support running 1600Mhz via an x8 multiplier that is often undisclosed. For anything above that, you are truly on your own, you have to OC the bus clock and most everything else.

If you can lower your timings at 1600Mhz you could possibly match the results you would get on 1866Mhz (assuming higher timings).
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