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Noobie overclocking question

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March 16, 2013 3:25:23 AM

Hi,

My system:

Asus P8Z77-V Pro
Intel i5-3570K, 3.4 Ghz
Corsair Vengeance DDR3-1600, 4x4Gb, XMP, 1.5v

I've been searching several hours for an answer to my questions, and can't seem to find them and now I'm thinking I don't understand the concept clearly.

My intent is to overclock the memory to higher speeds. When I enable XMP the only profile available is "DDR3-1600 9-9-9-24" for my memory which is exactly the listed specs for it. My expectation was that since my memory is already rated 1600 that the profile should be higher than that if it can be overclocked.

Is this due to a limitation to what the processor can support, or am I thinking about this all wrong? I was hoping to clock the memory up to 2133.

And if this is a hardware related limitation is there anyway of knowing what the XMP profile would be for any given set of memory before purchasing it?

a b K Overclocking
a b } Memory
March 16, 2013 3:32:48 AM

You should have gotten DDR3-2133 then. Some memory will OC but to get 2133 out of DDR-1600 RAM is likely too optimistic without increasing the voltage. The increase in memory speed will do little for your game performance.
-Bruce
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a b K Overclocking
a b } Memory
a b Ĉ ASUS
March 16, 2013 3:35:17 AM

its not about those, when you OC, you increase them (most of the time manually) above it's rated speed. Whether it is GPU , CPU or rams. set things to manual and adjust accordingly.
i would suggest that you do some reading first. just to be safe.

also, note that oc'ing memory does not yield (as far as i know) that much performance increase compared to oc'ing a cpu. a modern cpu like yours can go from 3.x to 4.x without much problem. even 5ghz is not surprising unlike before.
those will give you benefits,
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March 16, 2013 3:36:07 AM

Neoeclectic said:
Hi,

My system:

Asus P8Z77-V Pro
Intel i5-3570K, 3.4 Ghz
Corsair Vengeance DDR3-1600, 4x4Gb, XMP, 1.5v

I've been searching several hours for an answer to my questions, and can't seem to find them and now I'm thinking I don't understand the concept clearly.

My intent is to overclock the memory to higher speeds. When I enable XMP the only profile available is "DDR3-1600 9-9-9-24" for my memory which is exactly the listed specs for it. My expectation was that since my memory is already rated 1600 that the profile should be higher than that if it can be overclocked.

Is this due to a limitation to what the processor can support, or am I thinking about this all wrong? I was hoping to clock the memory up to 2133.

And if this is a hardware related limitation is there anyway of knowing what the XMP profile would be for any given set of memory before purchasing it?



The XMP profile is simply the JEDEC memory extension that allows you to default to that DDR3-1600 setting. Your problem is that to get a higher memory speed you need to manuallychange the memory divider in your BIOS to 1:7 for DDR3-1866 for example; other memory speeds will need a different divider. Now to actually hit that higher speed you'll need to loosen up your memory timings as well.

Btw, I have that same RAM and processor and I've only been able to overclock it to DDR3-1866 CAS 10-11-11-30 1T @ 1.56V. I could maybe go higher but I'm not willing to turn my voltage anywhere near 1.6 or higher.
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March 16, 2013 3:37:23 AM

Cons29 said:
its not about those, when you OC, you increase them (most of the time manually) above it's rated speed. Whether it is GPU , CPU or rams. set things to manual and adjust accordingly.
i would suggest that you do some reading first. just to be safe.

also, note that oc'ing memory does not yield (as far as i know) that much performance increase compared to oc'ing a cpu. a modern cpu like yours can go from 3.x to 4.x without much problem. even 5ghz is not surprising unlike before.
those will give you benefits,


I don't know what you've been reading but hitting 5GHz using an Ivy Bridge processor would be surprising.
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a b K Overclocking
a b } Memory
a b Ĉ ASUS
March 16, 2013 3:38:45 AM

oh, my bad, i was thinking of my sandy bridge :) 
yeah i heard that ivy's dont oc as much as sandy's
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March 16, 2013 3:46:21 AM

Cons29 said:
oh, my bad, i was thinking of my sandy bridge :) 
yeah i heard that ivy's dont oc as much as sandy's


Yeah you'd be a lucky person to have a stable 4.8GHz OC using water with Ivy Bridge and only about 1-2% of Ivy Bridge processors have been shown to hit near that 4.8-5GHz mark and be stable. Typical OC max for i5-3570K is 4.4-4.6GHz.
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a b K Overclocking
a b } Memory
March 16, 2013 3:46:37 AM

if you wanted 1600mhz ram that seriously overclocks should have got this

http://www.overclockers.co.uk/showproduct.php?prodid=MY...

and its tiny--fits under big heatsinks no problems

they tested it at

- 1600MHz (7-8-8-24 1N) @ 1.40v
- 1866MHz (9-9-9-27 1N) @ 1.40v
- 2000MHz (9-10-10-28 1N) @ 1.45v
- 2133MHz (10-10-10-28 1N) @ 1.45v
- 2400MHz (11-11-11-28 2N) @ 1.50v
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March 16, 2013 3:50:31 AM

s3anister said:
Neoeclectic said:
Hi,

My system:

Asus P8Z77-V Pro
Intel i5-3570K, 3.4 Ghz
Corsair Vengeance DDR3-1600, 4x4Gb, XMP, 1.5v

I've been searching several hours for an answer to my questions, and can't seem to find them and now I'm thinking I don't understand the concept clearly.

My intent is to overclock the memory to higher speeds. When I enable XMP the only profile available is "DDR3-1600 9-9-9-24" for my memory which is exactly the listed specs for it. My expectation was that since my memory is already rated 1600 that the profile should be higher than that if it can be overclocked.

Is this due to a limitation to what the processor can support, or am I thinking about this all wrong? I was hoping to clock the memory up to 2133.

And if this is a hardware related limitation is there anyway of knowing what the XMP profile would be for any given set of memory before purchasing it?



The XMP profile is simply the JEDEC memory extension that allows you to default to that DDR3-1600 setting. Your problem is that to get a higher memory speed you need to manuallychange the memory divider in your BIOS to 1:7 for DDR3-1866 for example; other memory speeds will need a different divider. Now to actually hit that higher speed you'll need to loosen up your memory timings as well.

Btw, I have that same RAM and processor and I've only been able to overclock it to DDR3-1866 CAS 10-11-11-30 1T @ 1.56V. I could maybe go higher but I'm not willing to turn my voltage anywhere near 1.6 or higher.


I appreciate the great and quick replies.

Okay, so if I understand the only way to really overclock the memory is to manually adjust the timings and the voltage. I read up on adjusting timing and voltage but obviously got it wrong since my PC was failing to POST or boot the OS.

Is there a resource I can read that clearly explains memory dividers and how to adjust timing for the purpose of overclocking?

To clarify is there something I can read that will tell me try setting timings to X and adjusting voltage by Y amount?
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March 16, 2013 3:55:34 AM

Neoeclectic said:
s3anister said:
Neoeclectic said:
Hi,

My system:

Asus P8Z77-V Pro
Intel i5-3570K, 3.4 Ghz
Corsair Vengeance DDR3-1600, 4x4Gb, XMP, 1.5v

I've been searching several hours for an answer to my questions, and can't seem to find them and now I'm thinking I don't understand the concept clearly.

My intent is to overclock the memory to higher speeds. When I enable XMP the only profile available is "DDR3-1600 9-9-9-24" for my memory which is exactly the listed specs for it. My expectation was that since my memory is already rated 1600 that the profile should be higher than that if it can be overclocked.

Is this due to a limitation to what the processor can support, or am I thinking about this all wrong? I was hoping to clock the memory up to 2133.

And if this is a hardware related limitation is there anyway of knowing what the XMP profile would be for any given set of memory before purchasing it?



The XMP profile is simply the JEDEC memory extension that allows you to default to that DDR3-1600 setting. Your problem is that to get a higher memory speed you need to manuallychange the memory divider in your BIOS to 1:7 for DDR3-1866 for example; other memory speeds will need a different divider. Now to actually hit that higher speed you'll need to loosen up your memory timings as well.

Btw, I have that same RAM and processor and I've only been able to overclock it to DDR3-1866 CAS 10-11-11-30 1T @ 1.56V. I could maybe go higher but I'm not willing to turn my voltage anywhere near 1.6 or higher.


I appreciate the great and quick replies.

Okay, so if I understand the only way to really overclock the memory is to manually adjust the timings and the voltage. I read up on adjusting timing and voltage but obviously got it wrong since my PC was failing to POST or boot the OS.

Is there a resource I can read that clearly explains memory dividers and how to adjust timing for the purpose of overclocking?

To clarify is there something I can read that will tell me try setting timings to X and adjusting voltage by Y amount?


Yes. Start here: http://www.masterslair.com/memory-ram-overclocking-guid...

Be forewarned though, just take that guide as general information as it was intended for use with a much older core architecture. Also, you might want to try setting your timings to 11-11-11-30 2T at 1.6V just to see if you can POST. Once you've managed to POST and get into windows that's when you start playing around with tighter timings and/or less voltage.
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March 16, 2013 3:59:18 AM

Thanks, s3anister. I appreciate the help.
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a b K Overclocking
a b } Memory
March 16, 2013 4:03:26 AM

yeah be carefull thats for older gen

and the ram voltage was higher then 1.65v to 1.5v on your ivy

not sure i would happily put 1.6v through my vengeance on sandybridge

my 1600mhz vengeance will do just over 1700mhz on 1.5v by upping the bclk

but upping the bclk has its own issues
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March 16, 2013 4:44:02 AM

Neoeclectic said:
Thanks, s3anister. I appreciate the help.

No problem, glad I was able to help.
mcnumpty23 said:
yeah be carefull thats for older gen

and the ram voltage was higher then 1.65v to 1.5v on your ivy

not sure i would happily put 1.6v through my vengeance on sandybridge

my 1600mhz vengeance will do just over 1700mhz on 1.5v by upping the bclk

but upping the bclk has its own issues


You really shouldn't be touching the base clock on Sandy/Ivy unless you have access to LN.
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