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Radeon 7850 Giving Fps Drop W/ Low Utilization


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#1 Mothykins

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Posted 30 October 2014 - 09:00 PM

High settings, GPU reading around 80% useage, frame-rate dropping to 25-35 fps at times, even in testing grounds on DX9 mode. Hilariously, max settings with particles turned to high seems to net the same overall results.

DX11 produces the same results, just more CPU use and lower overall fps.

Pretty sure it's not the Processor, nor the Ram, but it may be a limitation of the card? Will post specs for you fellows:
  • Operating System

    Windows 7 Home Premium 64-bit SP1
  • CPU

    AMD Phenom II X6 1090T
  • RAM

    12.0GB Dual-Channel DDR3 @ 535MHz (8-8-8-20)
  • Motherboard

    ASUSTeK Computer INC. Crosshair IV Formula (AM3)
  • Graphics

    SAMSUNG (1920x1080@60Hz)
    1024MB ATI AMD Radeon HD 7800 Series (XFX Pine Group)
  • Storage

    931GB Western Digital WDC WD1002FAEX-00Z3A0 ATA Device (SATA)

More on the XFX:
Voltage 0.900 V
GPU Clock 860.0 MHz
Core Voltage 0.900 V
Driver version 14.301.1001.0
BIOS Version 113-785ZNF80.SB
Memory Type GDDR5
Memory 1024 MB
Bandwidth 153.6 GB/s

any settings or config settings to try? tricks with the card itself?



EDIT: I disabled Cockpit glass on a whim, suddenly getting much smoother fps...

What.

Edited by Cavale, 30 October 2014 - 09:34 PM.


#2 lollibast

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Posted 31 October 2014 - 04:15 AM

I have a similar issue. I use a AMD Radeon HD 7900 Series graphics card and have low frames (around 20-30) with low useage (around 30-40%). I turned all the settings to low but my framerate is ridiculous.

#3 Napoleon_Blownapart

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Posted 31 October 2014 - 07:52 AM

12.0GB Dual-Channel DDR3 @ 535MHz (8-8-8-20) is this right?

is this 3x4G sticks?maybe youre running single channel with the 3rd stick?instead of dual with 2 or 4sticks ? (just a guess)
others will comment but you can try removing a stick and see if 8gigs as dual channel runs better

i think dx11 utilizes the gpu more and dx9 uses the cpu more

#4 bar10jim

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Posted 31 October 2014 - 10:43 AM

View PostCavale, on 30 October 2014 - 09:00 PM, said:

Hilariously, max settings with particles turned to high seems to net the same overall results.



This seems to be indicative of being CPU bound. Check other AMD threads in the forum.

#5 Aratan Aenor

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Posted 31 October 2014 - 12:21 PM

View PostCavale, on 30 October 2014 - 09:00 PM, said:


EDIT: I disabled Cockpit glass on a whim, suddenly getting much smoother fps...



How much smoother?


View Postbar10jim, on 31 October 2014 - 10:43 AM, said:


This seems to be indicative of being CPU bound. Check other AMD threads in the forum.



My stock 1055T and 7970 run a steady 50 fps on Very High settings with MSAA enabled, a 1090T with a 7850 shouldn't have any problems with High settings.

#6 Flapdrol

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Posted 31 October 2014 - 01:09 PM

View PostCavale, on 30 October 2014 - 09:00 PM, said:

Pretty sure it's not the Processor

Why do you think this?

#7 Mothykins

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Posted 31 October 2014 - 05:21 PM

View PostGorantir, on 31 October 2014 - 07:52 AM, said:

12.0GB Dual-Channel DDR3 @ 535MHz (8-8-8-20) is this right?

is this 3x4G sticks?maybe youre running single channel with the 3rd stick?instead of dual with 2 or 4sticks ? (just a guess)
others will comment but you can try removing a stick and see if 8gigs as dual channel runs better

i think dx11 utilizes the gpu more and dx9 uses the cpu more

It's running a mixed pair or Ram Dual channel; it hasn't been an issue before: here's the two sets:
Type DDR3
Size 2048 MBytes
Manufacturer OCZ
Max Bandwidth PC3-8500F (533 MHz)


Type DDR3
Size 4096 MBytes
Manufacturer Corsair
Max Bandwidth PC3-10700H (667 MHz)

I could pull the smaller OCZ chips and see what happens though. Let me pull up my

View PostFlapdrol, on 31 October 2014 - 01:09 PM, said:

Why do you think this?

Cores run really steady across the board, no major hiccups. Could be wrong though.

View PostAratan Aenor, on 31 October 2014 - 12:21 PM, said:

How much smoother?

We're talking 5-10 FPS average increase, though I still get major dips to 20-30 range. Pretty silly.

#8 Flapdrol

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Posted 01 November 2014 - 04:57 AM

Low fps in this game is almost always the cpu.

Anyway, I sometimes have terrible fps, and have to restart the client, repairtool might help.

#9 Chrithu

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Posted 02 November 2014 - 02:27 AM

It actually IS the CPU. Try OCing it. I run a 1055T and OCing it helps tremendously. My mainboard and cooling alows just a jump from 3.3 GHz to 3.5 GHz but that alone helped to raise my avergae FPS by 10 and thus prevents it from dropping below 30 even in the most busy screen action.

I tested OCing to 3.63 GHz which raised the min observed FPS I got to 40ish but sadly makes the system super unstable.

So yeah. Basically what many people in the hardware subforum state is very true: MWO needs a lot of CPU Power to run smooth. 3.5 GHz seems to be the minimum needed to prevent dropping below 30 FPS and according to what I read at 4 GHz you finally reach the point where your GPUs can become the bottleneck.

#10 Vimeous

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Posted 02 November 2014 - 03:49 AM

I ran a 7850 2GB in my q9450 and got 18-20 minimum at 2560x1440 with very high settings and DX11 in MWO.
The same card and subsequently my current 6870 1GB in my 4670K and get 20-22 minimum with the same settings.
No overclocks on any hardware.

Considering the supposed chasm in CPU performance between chips I'd of thought the improvement would be greater.

Benchmarks suggest the 7870 was a chunk faster than the 7850. I also remember custom cooler 7850's supposedly OC'ed to 7870 levels quite convincingly (Custom PC mag if memory serves).
I'd try a test OC to your 7850 as it's free and if you get more fps then great!

Aratan, AnanTech's benchmarks (http://www.anandtech...duct/508?vs=549) suggest the 7970 is 30-50% faster than the 7850 across the board. That would suggest what the OP is seeing is an accurate reflection of GPU performance.

#11 Mothykins

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Posted 02 November 2014 - 10:00 AM

View PostVimeous, on 02 November 2014 - 03:49 AM, said:

I ran a 7850 2GB in my q9450 and got 18-20 minimum at 2560x1440 with very high settings and DX11 in MWO.
The same card and subsequently my current 6870 1GB in my 4670K and get 20-22 minimum with the same settings.
No overclocks on any hardware.

Considering the supposed chasm in CPU performance between chips I'd of thought the improvement would be greater.

Benchmarks suggest the 7870 was a chunk faster than the 7850. I also remember custom cooler 7850's supposedly OC'ed to 7870 levels quite convincingly (Custom PC mag if memory serves).
I'd try a test OC to your 7850 as it's free and if you get more fps then great!

Aratan, AnanTech's benchmarks (http://www.anandtech...duct/508?vs=549) suggest the 7970 is 30-50% faster than the 7850 across the board. That would suggest what the OP is seeing is an accurate reflection of GPU performance.

Let me expand a little on this; This is an update of graphics cards from a 4870, which got nearly the exact same results running on medium. I'm beginning to suspect the culprit is the cards overall memory size. If you notice, my card is the Oddball 1GB memory size, not the 2GB (To be fair, I paid $20 for it, so I'm not terribly upset) which means those benchmarks aren't exactly correct...

On a bit of experimentation, I can keep the dips above 30fps by clocking to 1025MHz core and 1300MHz memory, with a 20% power draw increase. Overall better performance though (About 10 Fps, which is huge.) Gets a bit toasty, and my case isn't the best for ventilation though (The debate is if I should pull the thing apart and Mod the case, or just get a new case...)

View PostJason Parker, on 02 November 2014 - 02:27 AM, said:

It actually IS the CPU. Try OCing it. I run a 1055T and OCing it helps tremendously. My mainboard and cooling alows just a jump from 3.3 GHz to 3.5 GHz but that alone helped to raise my avergae FPS by 10 and thus prevents it from dropping below 30 even in the most busy screen action.

I tested OCing to 3.63 GHz which raised the min observed FPS I got to 40ish but sadly makes the system super unstable.

So yeah. Basically what many people in the hardware subforum state is very true: MWO needs a lot of CPU Power to run smooth. 3.5 GHz seems to be the minimum needed to prevent dropping below 30 FPS and according to what I read at 4 GHz you finally reach the point where your GPUs can become the bottleneck.

I could OC it, as I can get to about 3.8Ghz without much issue...





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