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EVG 980Ti slow in one PC compared to same card in another PC

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RonVideo
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2016/05/29 10:38:16 (permalink)
I installed an EVGA GTX-980 in the first 16x slot of an HP z820 with dual CPUs. (All slots run at their full rated speed with 2 CPUs.)
 
It works, but is considerably slower (measured using Passmark PerformanceTest) than the same EVGA card in another non-HP machine with the same video driver version and video card firmware:
 
HP z820 - 3d Graphic Mark = 8,160
Other PC - 3d Graphic Mark = 12,671
 
The HP did not automatically run the video card at PCIe 3.0, so I modified the registry so that it would, but (as expected) the difference was insignificant.
Unless there is something faulty with video card in the HP which is causing it to drag it feet, what could be going on here?
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    TheSadClown
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    Re: EVG 980Ti slow in one PC compared to same card in another PC 2016/05/29 11:39:55 (permalink)
    We would need full specs of both machines to figure out whats going on. 
    #2
    Sajin
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    Re: EVG 980Ti slow in one PC compared to same card in another PC 2016/05/29 15:14:43 (permalink)
    Different hardware = different results.


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
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    RonVideo
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    Re: EVG 980Ti slow in one PC compared to same card in another PC 2016/05/29 17:53:07 (permalink)
    I guess I am not sure how much interaction there is between the video card and the rest of the computer. On the Passmark site they show a 980Ti and the person who submitted it had a 3d Mark score of 11,571, which is in line with the score I got with my second PC. The only thing it says about that guy's hardware is:  Bus Interface: PCIe 3.0 x16, Max Memory Size: 6144 MB.
     
    My HP z820 has two Xeon E5-2680 @ 2.70 GHz, 128 GB DDR3 RAM, PCIe 3.0 slots for video card, etc. When you have two CPU's, all the PCIe slot run at their max electrical speed. The z820 is about 3 years old.
     
    The other PC is a couple years newer: Asus Sabertooth X99, 32 GB RipJaws4 DDR4-2800, Intel i7-5930K 3.5 GHz, PCI-e 3.0 slots.
     
    The dual Xeons with 16 cores substantially exceed the performance of the Asus on the Passmark CPU mark, but the Asus motherboard has a higher memory performance score with its faster DD4 RAM, even though only 32 GB.
     
    Could three-year old hardware being holding back the 980Ti's performance?
    #4
    arestavo
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    Re: EVG 980Ti slow in one PC compared to same card in another PC 2016/05/29 18:12:47 (permalink)
    I think it has more to do with the fact that you are running a 2P server motherboard. Back when I had my old 780 Ti Classifieds, I tried running one in a 4P AMD server board and it struggled with any game/benchmark.
     
    The only thing I can think of is make sure your server board's BIOS is up to date, and the motherboard drivers are up to date - the Intel management engine in particular.
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    RonVideo
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    Re: EVG 980Ti slow in one PC compared to same card in another PC 2016/05/30 15:51:01 (permalink)
    Does the Intel Management Engine really have an effect on video performance? I thought it was mainly for remote management. It is an interesting idea, especially since I routinely don't install it; it is also not on my Asus machine, however. But I installed it on the HP and unfortunately the 3d results were the same.
     
    I guess I am really going to have to install the 980Ti in another machine or try another video card in the HP to confirm the situation.
     
    There are a lot of video card parameters sampled by MSI Afterburner, which is what I am using, as well as other similar utilities. I wonder if they might reveal a possible answer to my problem?
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    arestavo
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    Re: EVG 980Ti slow in one PC compared to same card in another PC 2016/05/30 16:15:27 (permalink)
    Whoops, the IME might not be the one I'm thinking of - its the one that updates your drivers for various Intel motherboard components.
     
    Did you set Windows to adjust for best performance of Programs, not Background Services? I'm thinking that most server installations default to background services.
     
    In the end, server boards aren't really set up for what gamers do, which is why I went with an enthusiast board that I threw in gobs of RAM and soon a 2690 V4.
    post edited by arestavo - 2016/05/30 16:19:21
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    RonVideo
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    Re: EVG 980Ti slow in one PC compared to same card in another PC 2016/05/30 17:17:35 (permalink)
    I think you meant Intel Chipset Device Software, which I did update.
    I don't really understand why a workstation/xeon board would be worse than a mainstream/gamer's board with regard to video performance. These HP workstations are especially geared for content creation using high-end CAD/3d software.
    But thanks for your suggestions.
    #8
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