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Why would Dxdiag show incorrect vram?

post #1 of 6
Thread Starter 
UPDATE 3-30-11: Im just looking for an answer to that question. I have 2gb gddr5, it shows 996mb. Updated driver, chipset drivers, latest directx drivers, latest bios update. Any takers?




after spending almost two days on google, Ive come to this thread. I just recently have a new build that i finished setting up. Im using a Firepro V7800 that I got for 550 dollars. It was used, but was in near new condition with all the correct packaging and stuff.

I have been using Maya 2011 for the last year or so. Along with Zbrush 4.0 and CS5 suite.

So I moved to this card from a Quadrofx 3450. I also moved to an AMD Phenom II system from an Intel Q6600 system. With a huge boost in ram to 16gb of gskill ripjaws 1600. So the nvidia card I used to have could handle pretty much anything I threw at it. It would only get really bogged down when playing back some ncloth simulations or doing some modeling in zbrush with 6million+ polys.

I thought that since the V7800 compared fairly well to the quadro 4000 I would give it a try. Now I have read on another forum, and this is the only other account of this happening that i have seen, that the 64 bit driver of the V7800 is only allowing the computer, or dxdiag to see 996mb of memory on the card. However I have opened up GPU-Z and it shows the full 2gb.

Now when using Maya I noticed that I now have a lag issue and really low drop in frame rate when manipulating a mesh that I previously had no issues with. I even changed the viewport renderer to high quality and to the viewport 2.0 setting with no luck. I have fast interaction on but that only really helps when moving the camera around.

I also read on the other persons thread that he had sent his card back for a new one and ran into the same issues again. So he decided to install the board on a 32 bit system with the 32 bit driver and it WORKED! What a rip off though. He, as well as I and so many other people would likely now have to limit our systems to a super slow OS just to get the card working properly.

Since Windows wont allow me to install a 32 bit driver on my x64 win7 I am going through the previous versions of the driver and may try to use the v8800 driver to make it work. Ive also already tried out the V7800 beta driver they have up which is 8.803 or something. It didnt work either.

System:
1090t phenom II black edition
h50 corsair cooler
ASUS m4a87td evo motherboard
16gb gskill ripjaws 1600 memory
Firepro V7800 ---37degrees idle---48 deg load
Thermaltake 775w psu
NZXT Phantom case with plenty of fans.


Update shortly after:

ok so i figured i have found part of the issue. I have amd overdrive and cpuid open at the same time when im using Maya. I checked these two softwares to see how much memory the gpu is using. They both report that under very complex scenes the gpu is not raising its clock speed to the maximum setting which is 700. The core is getting stuck at 157mhz!? and the memory clock is stuck at 300mhz. It may jump every so often to 1000mhz for memory and 700 core for a second but then it just goes baack down. AMD Overdrive says that this is a level 0 out of like 3 steps at which the gpu will increase its clock speeds to keep up. It just seems that the card is not clocking itself properly. I feel that this may be what is causing my crashes and lag in maya. Because while was manipulating a real complex object in the viewport, the fps sped up very quick when the gpu hit those higher clocks for a second. then back down and more lag.

Also i noticed that when im playing youtube videos regardless of what setting the quality is on, the core clock stays at 400 and the memory clock at 900. this is higher but still not highest.

I recently downloaded MSI afterburner as well as AMD GPU tool. Overclocked the GPU to the rated clock speeds of 700-core and 1000-memory. I then decided to bench test it with the GPUTool stability test. It ran great. fps was maxed at like 204. temps got as high as 70c till I fixed the fan curve to make it run faster. on 100% this fan is a screamer! but at 60-75 % the card came down to 62c! idle, without the overclocks it is sitting at 37C(i have two fans directly on it) and with the overclock idle sits somewhere around 53-55C which is awesome.

So my one and only last gripe which may or may not be an issue now, is the fact that I downloaded this ATI program called MemoryViewer. Its supposed to display the amount of memory that the gpu is actively using. every time i run it, even during stability tests it say the gpu is only using 37 or 55mb of memory? all the time, it doesnt fluctuate at all. even in maya 2011.

so thats my issue in a nutshell. Maya viewport performance is better, and i can run Crysis max settings at 1080 getting 25-35fps average. So is there a real problem with this card or am I trippin on nothin?

Edited by tazbo28 - 3/30/11 at 2:38pm
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
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CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
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post #2 of 6
Ignore that program you downloaded. A lot of the ATI tools were meant for last generations and older gpus.

Have you tried setting your systems power scheme to high power? You're having a power play issue. You can disable it.
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post #3 of 6
Thread Starter 
Im not aware of this power play issue? Ive never heard of setting something to high power.

If your reffering to the graphics card itself, I have found that when I do overclock it using the above mentioned softwares the voltage increases in three steps. The stock clock will set the voltage at .95v, then at around 400mhz its set at 1v, and at the highest 700mhz its set at 1.1v all automatically according to the clock speed.

If your refering to the bios or my operating system Im not sure how or where to find those settings, could you please elaborate?
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
  hide details  
Reply
post #4 of 6
Thread Starter 
Nevermind, well I have found out how to change my computers power plan if that is what you were talking about. I selected the "High performance" setting as it was previously on the "Balanced" setting. Hope this helps with some of the issues. If not Ill post some update. Thanks for the advice.
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
  hide details  
Reply
post #5 of 6
Thread Starter 
does anyone else have this card?
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
  hide details  
Reply
post #6 of 6
Thread Starter 
Bump for an answer
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Phenom II 1090t @ 3.86ghz ASUS M4A87TD EVO Firepro V7800 16gb G.Skill Ripjaws 
Hard DriveOSMonitorKeyboard
1tb WD Caviar Blck Windows 7 Ultimate x64 Dell 24" LED Logitech MX3200 
PowerCaseMouse
Thermaltake Toughpower XT 875w NZXT Phantom (White) Generic Dell optical 
  hide details  
Reply
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