How important is RAM latency 16 replies

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Sgt. D. Pilla

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#11 10 years ago
No. No difference between FPS/ anything else. You'd only notice a tiny difference in synthetic benchmarks. Latency does very little to performance and theres less than a 1% difference between 1600mhz and 1800mhz

My experiance begs to differ. I gained 5FPS average in all games when I changed my Kingston CL6 800 (@939MHz) (4GB, 2*2GB Kits) to G.Skill PI CL5 1066 (@1095MHz) (8GB, 2* 4GB Kits)




Chocu1a

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#12 10 years ago

Pilla, you also doubled the speed & capacity. Your post has little to do with latency. Get the OCZ. They are a solid memory maker & you can't beat the price.




Sgt. D. Pilla

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#13 10 years ago

I'm aware I did count, but Kow is saying speed and latency makes no difference in real world situations, but in my real world situations I saw a huge performance gain for faster and slower latency. And you like the others here know that going from 4GB to 8GB isn't going to make a performance increase. If I went 1/2GB to 8GB then yeah it would.




Chocu1a

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#14 10 years ago

Well, not so. I noticed a small difference going from 4 to 6 gigs in loading. Also, I believe the difference you might be noticing is the doubling of RAM speed. But whatever. It is a matter of 1-2%...nothing really worth while. I only recall Kow saying latency. He made no mention of speed.




kow_ciller

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#15 10 years ago

That 4-5fps boost would most likely have more to do with your FSB having more available bandwidth, thus reducing the bottlneck that the ram is for every CPU and increasing your FPS. That, or you just got lucky and happen to get a couple more FPS for some reason or another. Latency makes Almost no difference even in synthetic benchmarks. The only places you see differences are when you compare massive differences in latency (3cas and 9cas) and benchmarks that test memory bandwidth. Besides that, it should make NO difference in games.

Bandwidth is in the same court as latency. While it may look pretty to run super-high speed ram in bandwidth benchmarks, when it comes to real world performance there really isn't a point to having 1066 over 800mhz. The only reason benchers get super-low latency ram with high speeds is the fact that it allows them to loosen up the timings and push the ram as hard as possible. High-end ram is made for those who need to find the perfect ballance of latency and pure speed for benchmarks like superpi or pifast where that .000001 second can be the difference between making the top 10 in the world for an overclock and being in the top 1000.




Sgt. D. Pilla

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#16 10 years ago
That 4-5fps boost would most likely have more to do with your FSB having more available bandwidth, thus reducing the bottlneck that the ram is for every CPU and increasing your FPS.

Thats more acceptable to me then saying it just doesn't happen, like count said. Count, FYI.

Latency does very little to performance and theres less than a 1% difference between 1600mhz and 1800mhz

He said latency and speed.

I noticed a small difference going from 4 to 6 gigs

Yes but a game that uses 2GB of my 4GB, isn't going to suddenly give me FPS increase when it starts using 2GB of my 8GB, it doesn't work like that, I wish it did heck, I'd throw 16GB in to get another 5FPS.




C38368

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#17 10 years ago

Despite what some here erroneously believe, latency alone will have little impact on the life of a daily user.

Every now and again you'll come across a situation where lower latencies is perceptibly faster, but it's usually third in line for consideration (behind capacity and rated speed@voltage, respectively).

Personally, I'd pay, say, a $10 or $20 premium for otherwise comparable RAM with better latencies (all else being equal, they'll probably have better overclocking headroom), but not $70. Not in this day and age.

And OCZ makes excellent memory.




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