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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 3593

post #35921 of 38721
Quote:
Originally Posted by wermad View Post

I found an older version of AB and I finally have some proper readouts on my four Lightnigns wheee.gif. Only one missing is memory usage. It shows only one card and there's no option for all four. Anyways, played BF4 and it should almost 6gb! its defiitely wrong. Played Lost planet it shows 5.5gb tongue.gif. Definitely inaccurate. I'll load up gpuz and see that shows.

I've seen some titles exhaust GPU memory. The one that caught my attention was Skyrim as the title is very mature but uses lots of high texture packs. The analysis was done only using MSI Afterburner. I have not played it for several months and certainly not with any of the 14.x version drivers.

By comparison playing Dead Space 3 and capping frames to 60, the machine hardly breaks a sweat and memory usage is very low.

The latter datapoint is using 14.3 beta which has been very stable for me, and I concur with others stating same.
post #35922 of 38721
Quote:
Originally Posted by wermad View Post

I found an older version of AB and I finally have some proper readouts on my four Lightnigns wheee.gif. Only one missing is memory usage. It shows only one card and there's no option for all four. Anyways, played BF4 and it should almost 6gb! its defiitely wrong. Played Lost planet it shows 5.5gb tongue.gif. Definitely inaccurate. I'll load up gpuz and see that shows.

Is AB showing duplicates of the vram you have? I remember when I had xfire 6850's afterburner showed my vram usage at around 1.8gb despite both being 1gb cards.
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post #35923 of 38721
Oh I almost forgot, I may have some memory leak issues with Arma 3 as well. While playing Altis Life my memory usage was hovering around 2.5gb and slowly going up. I'll see if these 14.3 beta1 drivers fix it.
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post #35924 of 38721
Ah, you might be right. this older version is probably reading it double (ddr).
post #35925 of 38721
Quote:
Originally Posted by Deadboy90 View Post

Quote:
Originally Posted by wermad View Post

I found an older version of AB and I finally have some proper readouts on my four Lightnigns wheee.gif. Only one missing is memory usage. It shows only one card and there's no option for all four. Anyways, played BF4 and it should almost 6gb! its defiitely wrong. Played Lost planet it shows 5.5gb tongue.gif. Definitely inaccurate. I'll load up gpuz and see that shows.

Is AB showing duplicates of the vram you have? I remember when I had xfire 6850's afterburner showed my vram usage at around 1.8gb despite both being 1gb cards.
with four cards it shows 6iirc
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post #35926 of 38721
Quote:
Originally Posted by Mega Man View Post

with four cards it shows 6iirc

Yea I know. Its happening in BF4 so if on one card memory use would be 1.5gb then 1.5x4 cards would be 6gb. Maybe AB if quadrupling his memory reading because of his 4 cards like it doubled mine with 2.
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post #35927 of 38721
More likely its reading double since its been known (and I forgot about this) to read like this as its Double Data Rate (ddr) ram. Remember, having "GDDR5" doesn't mean its 5x times faster, its the fifth generation of graphics double data ram. It just returned to me how this was coming up for my old Titans and 690s setup. The 690s have 2gb of ram each core and i was getting ~3.8gb. It wasn't until someone brought up that AB reads in it double data, so you just have to divide by two. 3gb in BF4 is not surprising.

Also, memory doesn't stack w/ multiple graphics core, so its still per core count.




On on interesting note. My BE is only loading ~70% in BF4 while the other three PEs arel oading ~95-98%. I'll have to keep an eye on this.
Edited by wermad - 4/20/14 at 11:54pm
post #35928 of 38721
Quote:
Originally Posted by gr8sho View Post

I've seen some titles exhaust GPU memory. The one that caught my attention was Skyrim as the title is very mature but uses lots of high texture packs. The analysis was done only using MSI Afterburner. I have not played it for several months and certainly not with any of the 14.x version drivers.

By comparison playing Dead Space 3 and capping frames to 60, the machine hardly breaks a sweat and memory usage is very low.

The latter datapoint is using 14.3 beta which has been very stable for me, and I concur with others stating same.

In my experience Afterburner, TriXX, GPU-z, etc are not reliable for measuring the memory usage on video cards. What they are reporting, as far as I understand, is max allocated memory which would be in essence the same as measuring the regular RAM usage by adding up the actual working set and the "standby" (basically a cache for recently used files and for prefetch) RAM usage amounts. In my experience you can be fine for quite a while after the memory has "ran out" of the video card according to the GPU monitoring programs and the only sure way to tell that you have hit the vRAM wall is the straight trip to single digit FPS regardless of where you were before. On a dual channel RAM platforms that is usually around 3 fps and on quad channel it has been around 7 fps for me. I have never managed to run out of vRAM on a single 1080p screen even when using 1 GB vRAM card. With 1 GB I start encountering it with 3+ 1080p and with 2 GB I have managed to hit it few times with 5x 1080p screens. With 3 GB I have never managed to reach the vRAM wall (at 10 megapixels screen resolution). Granted I have no experience with BF4 and the initial discussion leading to this was about that. I only wanted to note that the monitoring programs are not fully reliable for monitoring the real vRAM usage.
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post #35929 of 38721
Quote:
Originally Posted by Carniflex View Post

In my experience Afterburner, TriXX, GPU-z, etc are not reliable for measuring the memory usage on video cards. What they are reporting, as far as I understand, is max allocated memory which would be in essence the same as measuring the regular RAM usage by adding up the actual working set and the "standby" (basically a cache for recently used files and for prefetch) RAM usage amounts. In my experience you can be fine for quite a while after the memory has "ran out" of the video card according to the GPU monitoring programs and the only sure way to tell that you have hit the vRAM wall is the straight trip to single digit FPS regardless of where you were before. On a dual channel RAM platforms that is usually around 3 fps and on quad channel it has been around 7 fps for me. I have never managed to run out of vRAM on a single 1080p screen even when using 1 GB vRAM card. With 1 GB I start encountering it with 3+ 1080p and with 2 GB I have managed to hit it few times with 5x 1080p screens. With 3 GB I have never managed to reach the vRAM wall (at 10 megapixels screen resolution). Granted I have no experience with BF4 and the initial discussion leading to this was about that. I only wanted to note that the monitoring programs are not fully reliable for monitoring the real vRAM usage.

Crashes are a pretty reliable maker for running out of vram too. tongue.gif. And the only game I know for sure runs out of vram on 1 1080p with a 1gb card is modded skyrim. I'm sure BF4 would too if you set textures to ultra and aa to x4 as well but I haven't tried it.

Also, the 14.3 beta 1 drivers didn't help my mantle memory leak, they were what I was already using turns out. Sooooo its back to 13.12 once again. I'm never gonna get away from these drivers am I? frown.gif
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