So when i got my PC, my motherboard down clocked my RAM to 1333MHz and instead of using DOCP (i think it's called that for AMD) i manually changed the speed. Originally my RAM was CL 9 but after resetting my MOBO at one point to fix some issues it had downclocked ram to 1333MHz and CL to 11, and when i changed the thing to DOCP it increased the speed but not the Latency. I know i can go in and change all the delays manually but im not sure if it did that for a reason and from putting it to CL 9 from CL 11 what performance difference would there be in Gaming and photo/video editing. I notice that RAM Latencies have increased over the years as ram speed increased, why is this?
What effect does CAS latency actually have?
- Thread starter xero99
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bigpinkdragon286
Splendid
- Oct 3, 2012
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The reason RAM latencies have increased with bandwidth is that there is not a whole lot new about the newer RAM except for it's bandwidth. They haven't re-engineered the RAM to have better latencies, so to cope with the higher speeds, the latencies have to go up.
The numbers you are looking at, when talking about CAS Latency or other RAM timings, are measures of how many clock cycles it takes to do something. So, the higher the number, the more clock cycles you are waiting for the part to perform a particular task.
Running your RAM at CL 9 instead of CL 11 could theoretically give you a near 20% improvement in CL intensive tasks, but there are other aspects to your RAM's timing, so you have to factor those in as well.
The numbers you are looking at, when talking about CAS Latency or other RAM timings, are measures of how many clock cycles it takes to do something. So, the higher the number, the more clock cycles you are waiting for the part to perform a particular task.
Running your RAM at CL 9 instead of CL 11 could theoretically give you a near 20% improvement in CL intensive tasks, but there are other aspects to your RAM's timing, so you have to factor those in as well.
Unolocogringo
Illustrious
- Dec 31, 2007
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Lower latencies for gaming make very marginal improvements, a couple frames per second. This in on newer DDR2-3 equipment. On older SDRAM it made quite a bit of difference.
If you are using an APU or motherboard chipset video it can make a lot of difference. Because they use motherboard memory for the video functions.
Single photo editing ,nothing noticeable , large batch editing or video editing will see considerable improvement going from cas 11 to cas 9 at the same 1333 or 1600 speed.
If you are using an APU or motherboard chipset video it can make a lot of difference. Because they use motherboard memory for the video functions.
Single photo editing ,nothing noticeable , large batch editing or video editing will see considerable improvement going from cas 11 to cas 9 at the same 1333 or 1600 speed.
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