Would upgrading my memory be worth the price?

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Darktanian

Darktanian

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Jan 15, 2012
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I currently run Corsair Vengeance 1600 that is OC'd to 1800. My MB can support up to 2133.

Would I see a significant difference in gaming, and or benchmarks if I upgraded to the 2133?
 
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Sakkura

Not really. The higher CAS numbers usually do not mean latency is actually any higher, and they don't affect bandwidth (latency and bandwidth being the two sides of memory performance).

The CAS numbers are quoted in clock cycles. So if you have the same latency is nanoseconds, then it will correspond to higher CAS numbers at higher clocks.

For example, DDR3-1600 CL8 has a CAS latency of 10 nanoseconds. DDR3-2400 CL12 also has a CAS latency of 10 nanoseconds, even though the CL number has gone from 8 to...
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jaimelmiel

jaimelmiel

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May 7, 2012
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No. You have an FX processor. It has an onboard memory controller. It is configured to run 1330, 1600. or 1866 Mhz.
I have an FX 9590. Same controller. I have my 2133 Mhz memory underclocked to 1866 Mhz, 1.5 volts. No difference in performance. Go by this chart from AMD. It is on the 8th post down.
http://www.overclock.net/t/1513004/fx-9370-with-1866-ram
In basic you will see no performance increase. If you are using 2 slots 1600 Mhz is recommended if also 4 slots are available.
See the chart.
 
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qlum

qlum

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I can say this: Nope.

maybe I am not using amd but I had 0 improvement going from 1066mhz ram to 2133mhz ram with the same timings on my 3570k so I highly doubt you will.
 
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Darktanian

Darktanian

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I'm using 4 slots.
I did get a gain from 1600 to 1800 using AMD's Overdrive when I OC'd them.

So bottom line is: The CPU will limit any gains I would get by upgrading?

 
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Darktanian

Darktanian

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Looking at my rig, what would you recommend I upgrade? I feel like I'm limited with what I can do using an AMD CPU.
 
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Sakkura

Sakkura

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Aug 22, 2011
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Not really. The higher CAS numbers usually do not mean latency is actually any higher, and they don't affect bandwidth (latency and bandwidth being the two sides of memory performance).

The CAS numbers are quoted in clock cycles. So if you have the same latency is nanoseconds, then it will correspond to higher CAS numbers at higher clocks.

For example, DDR3-1600 CL8 has a CAS latency of 10 nanoseconds. DDR3-2400 CL12 also has a CAS latency of 10 nanoseconds, even though the CL number has gone from 8 to 12. Most DDR3-2400 in fact has a lower CAS latency - CL11 and CL10 are the most common, corresponding to 9.17 and 8.33 nanoseconds respectively. Most DDR3-1600 actually has a higher latency than CL8, with CL9 being standard and CL10 and CL11 still showing up here and there. Those correspond to 11.25, 12.5, and 13.75 nanoseconds respectively.

With higher clocks, the CAS numbers do indeed go up, but the actual latency if anything tends to drop a little. So you end up with significantly higher bandwidth and slightly lower latency - better all around.

The real reason memory speed makes little difference to performance is that performance is simply not bottlenecked by memory to any appreciable degree in the large majority of programs and especially games.
 
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