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Is this CL9 RAM Compatible With a CL11 System

post #1 of 12
Thread Starter 
Dell 9010, i7-3770, Dell 0KV62T mobo, Win 7 Pro, BIOS-rev-08

Crucial, Dell 9010 Compatibility-page, there are 15 choices and they are all CL11 or CL13, none of them are under CL11 http://www.crucial.com/usa/en/compatible-upgrade-for/Dell/optiplex-9010-%28desktop%29

Listed on Crucial Comp-page CAS-CL11: Crucial, 16GB-Kit, 2x 8GB, DDR3, 1600mhz, PC3-12800, Non ECC, Desktop RAM, CL11-800mhz, SDRAM, ( on ebay: $65.00 ).

I found this too on ebay but it is not listed on the Crucial Dell 9010 comp-page: CAS-CL9 w/extended timings, 9-9-9-24: Crucial Ballistix Sport 16GB Kit, 1600mhz, PC3-12800, Dual Channel Kit, 2 x 8GB, CL9, for Desktops, $62.95.

A simple, slick Alum Heat Spreader delivers thermal performance along with standard timings and voltages, making this reliable, quality module ideal for max-stability and compatibility. With industry-stand-specs, little or no BIOS config required, trusted brand, anti-static-pkg.

Is the CAS-CL9 Crucial Ballistix Sport, 16GB Kit, 1600mhz, PC3-12800, Dual Channel Kit, 2 x 8GB, CL9 w/extended timings: 9-9-9-24.

Going to be fully compatible with the Dell 9010 i7-3770, Dell 0KV62T mobo, BIOS rev-08. Performing at the RAM's full lower CAS-CL9-rating, or will it revert to the systems original higher CAS-CL11-rating.

To confirm either way, will the BIOS show the RAM listed as CAS-CL9, and can the actual "active PC in use" CAS-CL-# reading be found on the Start/System-page or somewhere else in the Win-7-OS.

If the Dell 9010's mobo and-or BIOS is just going to revert the CL9 version RAM back to a CAS-CL11 limit, then I don't need to get the CL9 version RAM ...
Edited by walten - 8/16/16 at 9:54pm
post #2 of 12
It doesn't work that way,

Computers (motherboards, BIOS, etc.) don't have CL ratings, only memory does.
The CL rating, along with all the other timings, are programmed into the memory sticks. When a computer starts up it reads those timings and uses them in the BIOS to run the memory.

If you download CPU-Z and look at the SPD tab you will see the timings that are programmed into your memory. Note that there are different timings for different memory speeds. The CPU-Z memory tab shows the speed and timings at which your memory is actually running.

You can use any CL rating in any motherboard just so long as all the other memory specifications match the motherboard's memory specification (ie. amount of memory, size, speed, single/double sided, number of banks and rows, voltage, etc.)

Note that different models of Dell 9010 computers can use different sizes and amounts of memory though. See the memory category here.

So, you can use any 1600 MHz, 2 gig to 8 gig memory sticks with any CL rating.. Using memory faster than 1600 MHZ gets tricky though..
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post #3 of 12
Yeah what billbartuska said.

You can use whatever Cas rated memory you want. However if it has a lower Cas Latency with the same memory frequency, it'll probably be more expensive.

Using RAM that is not in the "supported" list specified by the mainboard manufacturer is generally not an issue (i don't think I've ever set up a system using RAM that was in the "supported" list and have yet to run into issues on desktops - had one issue with a laptop once, where it was very picky about what RAM it would run)
I guess you may see an issue if you buy some very cheap sticks.

You will also be able to run the CL9 Memory @ CL11 if you wish. You may even be able to increase the frequency a step or two by doing so.
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post #4 of 12
Thread Starter 
Dell 9010 DT, i7-3770, 4gb Hynix RAM CL11, Win 7 Pro 64-bit

On page-13, on the dell.com/downloads/global/products/optix/en/optiplex_9010_technical_guidebook RAM set-up-chart, for MT, DT, SFF, USFF, using 1-2-4-6-8-16 or 32 total-gb-RAM, for using 16gb-RAM-total, they only approve using 4 x 4gb-RAM, and the only boxes blocked out in the chart for the MT-DT-SFF, are those 3 option boxes for using 2 x 8gb RAM's.

They're selling Dell 9010 DT 16gb RAM kits everywhere as 2 x 8gb sets. Why on that Dell 9010 chart do they only recommend using 4 x 4 gb RAMs to use a 16gb total, and not include an option for using 2 x 8gb RAMs for a 16gb RAM total, for the MT, DT, and SFF ...
Edited by walten - 8/17/16 at 10:50pm
post #5 of 12
Quote:
Originally Posted by walten View Post

Why on that Dell 9010 chart do they only recommend using 4 x 4 gb RAMs to use a 16gb total, and not include an option for using 2 x 8gb RAMs for a 16gb RAM total, for the MT, DT, and SFF ...

The only reason I can think of is that Dell is stupid.
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post #6 of 12
Thread Starter 
Did you go to the page-13 and see it for yourself dell.com/downloads/global/products/optix/en/optiplex_9010_technical_guidebook.pdf

Is the reason they say-do that because, they want us to only use matched sets: If at 1st we use 2 x 8gb-RAM for a 16gb-RAM total, and then later on down the line, want to upgrade to a 32gb-RAM total by adding another 2 x 8gb-RAM, then we wouldn't end up with 4 x 8gb-RAM from the same set.

Is that the reason or is there any other reason that they don't recommend using 2 x 8gb-RAM and do recommend using 4 x 4gb-RAM, for a 16gb-RAM total.

Is there any difference in the performance or reliability of using 4 x 4gb-RAM vs 2 x 8gb-RAM ... What do you recommend ...
Edited by walten - 8/17/16 at 11:25pm
post #7 of 12
Thread Starter 
"You will also be able to run the CL9 RAM @ CL11 if you wish. You may even be able to increase the frequency a step or two by doing so."

Can you explain that, are you saying that in a "CL11-based-limited-system" or that we can change a setting, ( where-how do we change the setting ) to to run any CL-#-rated RAM at a different CL-#-rating.

What do you mean about increasing the freq-rating and what's more important a lower CL-#-rating or a higher freq-rating ...

What are the benefits and deficits of running the RAM at it's listed CL-rating or at a higher CL-#-rating if the mobo cannot run the RAM at it's listed lower CL-#-rating ...
Edited by walten - 8/17/16 at 11:28pm
post #8 of 12
Memory latency, or timings, like the number 10 in CL 10, are the length of time it takes the memory to complete a step in what it has to do. That "time" is measured in "clock ticks", ie CL 10 takes 10 clock ticks to complete before the memory can move on to it's next operation. The length of one clock tick is the speed at which the memory is running. 1600 MHz memory has a clock tick length of one 1,600,000,000th of a second (1,600,000,000 clock ticks per second), so the CL step takes 10 x 1/1,600,000,000 seconds.

There are two ways to change the performance of a memory stick.
Use the computer's BIOS settings to change the frequency (speed) of the memory - Higher MHz = higher performance
Use the computer's BIOS settings to change the timings of the memory - Lower timings = higher performance

You can not change the timings (ie. CL) of Dell computers.
You can not change the memory speed of Dell computers.

Note that when any computer starts up (posts) the BIOS reads the SPD tables programmed into the memory stick that is closest to the memory controller (ie. closest to the CPU in modern motherboards) and uses that information to calculate the speed and timings that will be applied to all the memory sticks. In an overclockable computer you can manually override these BIOS settings and set them to anything you want to. You have to be careful though because some settings (ie. to fast) will cause the computer to be unstable and crash.
 
Quote:
Originally Posted by walten View Post

What are the benefits and deficits of running the RAM at it's listed CL-rating or at a higher CL-#-rating if the mobo cannot run the RAM at it's listed lower CL-#-rating ...
 
If you run the ram at a higher CL setting than it is capable of running then memory performance will be lowered.
 

Quote:
Originally Posted by walten View Post

Did you go to the page-13 and see it for yourself

Yes:



Is the reason they say-do that because, they want us to only use matched sets: If at 1st we use 2 x 8gb-RAM for a 16gb-RAM total, and then later on down the line, want to upgrade to a 32gb-RAM total by adding another 2 x 8gb-RAM, then we wouldn't end up with 4 x 8gb-RAM from the same set.

Is that the reason or is there any other reason that they don't recommend using 2 x 8gb-RAM and do recommend using 4 x 4gb-RAM, for a 16gb-RAM total....

That explanation makes sense. But, alas, is not true as you can always buy matching ram later. although that may be extremely hard to do for numerous reasons.
Edited by billbartuska - 8/18/16 at 4:51am
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post #9 of 12
Thread Starter 
"That explanation makes sense. But, alas, is not true as you can always buy matching ram later. although that may be extremely hard to do for numerous reasons."

So, do you agree that, that is most likely the reason that Dell is excluding such a commonly used ( and needed ) 2 x 8gb RAM-setup from the recommended RAM set-up chart ... And just to be sure before ordering the new-16gb-RAM-set, do you confirm that using the correct "2 x 8gb" set of RAM is totally ok ...

And when you say, "you can always buy matching ram later," are you referring to buying a new 2cnd matched set of 2 x 8gb RAM to use next to the previously installed 2 x 8gb set of RAM are did you mean that if you wanted to further upgrade to 32gb total RAM, that you could replace the previously installed matched set of 2 x 8gb RAM, with a new 4 x 8gb 32-RAM matched set ...

Going back to the original question:

Dell 9010, i7-3770, Dell 0KV62T mobo, Win 7 Pro, BIOS-rev-08

Listed on Crucial Comp-page CAS-CL11: Crucial, 16GB-Kit, 2x 8GB, DDR3, 1600mhz, PC3-12800, Non ECC, Desktop RAM, CL11-800mhz, SDRAM, ( on ebay: $65.00 ).

I found this too on ebay but it is not listed on the Crucial Dell 9010 comp-page: CAS-CL9 w/extended timings, 9-9-9-24: Crucial Ballistix Sport 16GB Kit, 1600mhz, PC3-12800, Dual Channel Kit, 2 x 8GB, CL9, for Desktops, $62.95.

1) Do you agree that the CL9 version of the 2 similar RAM kits listed above is the better RAM to get ...

2) Is it certain that when installed the 1600-mhz-CL9-version will fully-perform as it's labeled, 1600-mhz-CL9, and show up in the BIOS "and-or-just-in-the" CPU-Z-display-readout-RAM-tab and CPU-Z-readout,txt report, as such ...

3) If you were using the 1600mhz-CL9-version instead of the 1600mhz-CL11-version, what kind of PC use would the better performance really show up ... Would there be better performance as far as less % of RAM being used as per the task manager RAM-meter. Would there be better performance as far as using more than 1 browser with many open tabs, or running multiple programs at the same time, some of each or all at the same time ...

After you answer these questions I will finally order 1 of the 2 1600mhz RAM kits mentioned above, the CL9 or the CL11 version ... Thank you very much for your help ...
Edited by walten - 8/18/16 at 7:07am
post #10 of 12
Quote:
Originally Posted by walten View Post

"That explanation makes sense. But, alas, is not true as you can always buy matching ram later. although that may be extremely hard to do for numerous reasons."

So, do you agree that, that is most likely the reason that Dell is excluding such a commonly used ( and needed ) 2 x 8gb RAM-setup from the recommended RAM set-up chart ... And just to be sure before ordering the new-16gb-RAM-set, do you confirm that using the correct "2 x 8gb" set of RAM is totally ok ...

There are no guarantees in life! All I can say is that if it was me, I'd do it.

And when you say, "you can always buy matching ram later," are you referring to buying a new 2cnd matched set of 2 x 8gb RAM to use next to the previously installed 2 x 8gb set of RAM or (sic) did you mean that if you wanted to further upgrade to 32gb total RAM, that you could replace the previously installed matched set of 2 x 8gb RAM, with a new 4 x 8gb 32-RAM matched set ...

You could do either. But again, just matching speed and the published timings isn't enough,
There are may timings and necessary settings that are not published by the memory manufacturers.


Going back to the original question:

Dell 9010, i7-3770, Dell 0KV62T mobo, Win 7 Pro, BIOS-rev-08

Listed on Crucial Comp-page CAS-CL11: Crucial, 16GB-Kit, 2x 8GB, DDR3, 1600mhz, PC3-12800, Non ECC, Desktop RAM, CL11-800mhz, SDRAM, ( on ebay: $65.00 ).

I found this too on ebay but it is not listed on the Crucial Dell 9010 comp-page: CAS-CL9 w/extended timings, 9-9-9-24: Crucial Ballistix Sport 16GB Kit, 1600mhz, PC3-12800, Dual Channel Kit, 2 x 8GB, CL9, for Desktops, $62.95.

1) Do you agree that the CL9 version of the 2 similar RAM kits listed above is the better RAM to get ...

Yes.

2) Is it certain that when installed the 1600-mhz-CL9-version will fully-perform as it's labeled, 1600-mhz-CL9, and show up in the BIOS "and-or-just-in-the" CPU-Z-display-readout-RAM-tab and CPU-Z-readout,txt report, as such ..

* That I don't know as you're venturing outside any information published by Dell.

3) If you were using the 1600mhz-CL9-version instead of the 1600mhz-CL11-version, what kind of PC use would the better performance really show up ... Would there be better performance as far as less % of RAM being used as per the task manager RAM-meter. Would there be better performance as far as using more than 1 browser with many open tabs, or running multiple programs at the same time, some of each or all at the same time ..

None of those.
Faster memory, be it higher MHz or lower timings doesn't allow you to do more things simultaneously, but whatever you do do will be done faster.
If you put a more powerful engine in you car it won't do your laundry while you drive, but it will get you where you're going faster.


After you answer these questions I will finally order 1 of the 2 1600mhz RAM kits mentioned above, the CL9 or the CL11 version ... Thank you very much for your help ...

* Here's an example of the type of things that can go wrong:

I have a Dell Optiplex 755 that runs 4 x 2 Gigs of 800 MHz Samsung memory at CL6.
That Samsung memory will run CL5 at 800 MHz, but, alas, as you know, that can't be manually set in a Dell BIOS.
I bought a stick of 1066 MHZ memory that has a SPD table for CL5 at 800 MHz Thinking that I could "trick" the computer into running CL5
I put that stick in slot 1 and sure enough all the memory runs at CL5, but, surprise, it was all downclocked to 666 MHz instead of 800 MHz?????
Why didn't it downclock just the 1066 stick to 800 MHz and run all the sticks at CL5 as they are capable of running??????

So, I guess the answer to your question is that you won't know for sure until you actually try it..................
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