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post #1651 of 2769
What causes these spikes? Is it something to do with memory, GPU or system memory? My DX11 game used to stutter A LOT with 8GB ram. Put 16GB in and it ran like butter. Went back to 8GB awhile ago and it's been better but not perfect. Increasing virtual memory from 8GB to 10GB seemed to help some too.

Should I try going with 16GB again and try Mantle one more time?
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post #1652 of 2769
They said it was memory leaks in BF4 mantle.
post #1653 of 2769
Gpu memory leak. You also should not use ultra textures if you have 2gb of VRAM or less.
post #1654 of 2769
Quote:
Originally Posted by Cmoney View Post

Can some people who are experiencing the CPU spikes try manually deleting the contents of you "cache" folder inside your BF4 documents folder.... do this before launch, and then while in game once you start getting the spikes. I have noticed that the first cache doesn't get re-created until restarting the game and I am able to make it through a round with virtually no spikes, and considerably improved FPS.

Try and report back.. I am just curious if this helps anyone else. (I'm on a single R9 280x with a 1090T)

Tried it, I get mixed results, some rounds (mainly on Domination or TDM) I can get less than 5 occurrences of stutter/fps drop. Though I had one round on Operation Locker where I had a massive amount of stutters that easily went over 30 instances. But on average, it's less than what it was before the patch. I hope the next patch and/or next driver update will get rid of this complete for my 7950.
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post #1655 of 2769
I tested it out with GPU-z. Dynamic VRAM hit 2228mb in Mantle mode (card is 2gb) using same settings as dx11.

That's what's causing my spikes. Guess there's still a memory leak. In dx11 it doesn't get past like 1800mb.
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post #1656 of 2769
I will say it again... Ultra textures needs at least 3GB of VRAM. If you're using 2000+ dynamic, that means you are using 2000+ system memory which means your VRAM is full. Same as your ram being full and using your hdd/ssd for virtual memory.
post #1657 of 2769
Also, add another ~250MB for msaa x2 @ 1080p.
post #1658 of 2769
Its not possible to calculate texture + aa vram because its dynamic
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post #1659 of 2769
Quote:
Originally Posted by yoshi245 View Post

Quote:
Originally Posted by Cmoney View Post

Can some people who are experiencing the CPU spikes try manually deleting the contents of you "cache" folder inside your BF4 documents folder.... do this before launch, and then while in game once you start getting the spikes. I have noticed that the first cache doesn't get re-created until restarting the game and I am able to make it through a round with virtually no spikes, and considerably improved FPS.

Try and report back.. I am just curious if this helps anyone else. (I'm on a single R9 280x with a 1090T)

Tried it, I get mixed results, some rounds (mainly on Domination or TDM) I can get less than 5 occurrences of stutter/fps drop. Though I had one round on Operation Locker where I had a massive amount of stutters that easily went over 30 instances. But on average, it's less than what it was before the patch. I hope the next patch and/or next driver update will get rid of this complete for my 7950.

Ya it has been mixed results for me too... strangely enough, it seems like the first round I play is the worst, and from then on I only get a spike here and there. Regardless, it is not worth the extra FPS for me at this time, I guess I will be sticking to DX11 until the next drivers/patch.
post #1660 of 2769
Actually, I never thought AMD could impress anyone with a second 28nm chip architecture. They have quite a pedigree of adopting state of the art technology almost instantaneously.
That said 290x's can run the "current" peaks of eyefinity resolutions. Comparing with 7970Ghz, 176 TMU's & 64 ROP's at 1 Ghz and 5Ghz ram via 512 bus can deliver %37 faster fps, or 2 times the pixel density until 11% higher memory bandwidth is fully taxed - which ever happens sooner.
So in that sense 290x is epic, but not as legendary as a new lithographic node would have been.
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