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Author Topic: Not Understood - Spec = 1600MHz DDR3 (OC)  (Read 8892 times)

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Klaus.S

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Not Understood - Spec = 1600MHz DDR3 (OC)
« on: 18-January-10, 21:03:46 »

I do not understand this motherboard spec.

When I contacted a supplier for RAM, they suggested that only 1333MHz DDR3 was "tested" and that is what they recommended for RAM.

Is this RAM only functional for overclocked settings ?

Am I missing out on higher RAM bandwidth using only 1333MHz DDR3 ?

TIA
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Henry

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« Reply #1 on: 18-January-10, 21:13:33 »

 What CPU and MB?

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Klaus.S

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« Reply #2 on: 18-January-10, 21:25:01 »

The spec is listed on a lot of motherboards.

I have the X48C.

I'm also looking at the 790GX-65 to build for someone else.

I'm just trying to understand this spec & obtain the fasted supported RAM, not here to brag about my motherboard.

Klaus
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Klaus.S

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« Reply #3 on: 18-January-10, 21:49:49 »

Here's a link to one.

It seems now I cannot find the same spec for the X48C, but I'll dig it up eventually.

This is for the 790GX-G65

http://www.msi.com/index.php?func=prodmbspec&maincat_no=1&cat2_no=&cat3_no=&prod_no=1739

DDR3 Memory DDR3 800/1066/1333/1600(OC) 

Just another note of confusion along the way ... while we are at this spec versus reality issue.

Spec = Max Memory (GB) 16 

Reality = KingMax FLGE85F-B8KG9 2GB (from the "test report")

from ...

http://www.msi.com/uploads/test_report/TR10_1739.pdf
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X48C Platinum
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X9770 QUAD 12MB L2
Mushkin Blockline PCS-12800 7-8-7-20
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+12V 56A
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Mike

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« Reply #4 on: 18-January-10, 23:19:31 »

DDR3 @ 1600 is an overclock spec.
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Klaus.S

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« Reply #5 on: 19-January-10, 02:50:44 »

"An overclock spec" doesn't explain enough for me.

1. Buy DDR 1600 RAM first, and then after it is installed one can enable one of the automatic overclock BIOS settings and then the RAM bandwidth will then work ?

Please elaborate.

I've built well over 30 motherboard types.  I simply do not understand.

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RemusM

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« Reply #6 on: 19-January-10, 11:41:18 »

"An overclock spec" doesn't explain enough for me.

Most of the DDR3-1600 modules on the market use overvolted DDR3-1333 chips (CAS 8 or CAS 9).
The real DDR3-1600 chips have the timings 10-10-10-27 or 11-11-11-30 and they work at 1.5V.
And they are very expensive!
Here are the DDR3 chips made by ELPIDA:


p.s.
All the DDR3-1800 ... DDR3-2200 memory modules on the market use overvolted DDR3-1600 chips.
That's marketing ...  :grin:
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note: NO overclocking!
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