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RAM speeds and bottlenecks

post #1 of 6
Thread Starter 
Hi All,

Recently I picked up a gtx780 (water cooled and oc'd to 1280) and have it paired with a 3570K @ 4.8Ghz and 1333Mhz ram (16gb).

My question:
Is it possible that my RAM speed could be bottle-necking my system?
I did some rough tests in BF4 with 64 man domination in lockers and noticed that when my memory was overclocked to 1866 I stayed at 120fps and, when clocked at 1333 it struggled to stay above 100fps. Sometimes dipping as low as 60fps mad.gif
Is this just variability or could my RAM be limiting my fps by that much?

Thanks!
post #2 of 6
Did you do multiple tests with both memory speeds? The load of online BF4 varies hugely depending on what going on in the game. If you only played one game with one and the other then that's not a big enough sample pool to draw any real conclusions.
Edited by Bit_reaper - 3/20/14 at 12:23pm
    
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post #3 of 6
Thread Starter 
No other tests. Like I said just a very rough comparison. But the map and player amount was the same. And both tests were at the same area of the map. I really can't think of another way to judge online activity other than sampling for hours (time I do not have lol). Are there synthetic benchmarks that anyone knows of to test fps in relation to CPU/memory load and not just the video card itself? Still boggles my mind of why a 780 on medium/high settings with all the fancy stuff turned off can not push above 100 fps average unless something else is the bottleneck in my system.
post #4 of 6
Doubt it's the RAM. Multiple sites have already showed that RAM speeds offer miniscule benefits above 1600MHz when it comes to gaming. I doubt 1333MHz RAM would impact your fps THAT much.
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post #5 of 6
Thread Starter 
Turns out it was a combination of a few things.
1) Reformatted and installed windows on SSD
2) Bumped mem clock to 1866 with 10-11-10-28 timings on XMS3 1333
3) Reinstalled BF4
Using same in game settings my fps stays at or very near 120, without all the spikes to the low 60's
post #6 of 6
Battlefield 4 is unusually sensitive to memory bandwidth. Ivy Bridge's sweet spot is DDR3-1600; DDR3-1333 leaves performance on the table.
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