Tag Archives: PhysX

Current changes

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A few weeks ago I started upgrading and changing several things on my media centre PC. Most importantly, I’ve exchanged the mainboard and the RAM. Another component that’s changed was the graphics card. I switched from a common GeForce GTX 560ti to a GeForce GTX 560ti 448.

The “old” graphics card was a SuperClocked version by EVGA, which had a lot of power but the EVGA Classified Edition of the GeForce 560ti 448 was too intriguing to be resisted to. The EVGA CE uses six power phases and is more a 570 than a 560. The big issue with the 570 is the lack power phases – four instead of five. One of my previous 570 cards died due to this fact during an overclocking session and a slight voltage increase.

I also exchanged the chassis, which looks much more elegant than the old chassis I’ve used and is a little quieter. The only noisy thing that is currently inside is the graphics card, but the cooling components will be exchanged in the very nearby future.

The CPU that was once working in my work PC wandered into the media centre giving me much more core horse power. The CPU is now overclocked but does not cause too much heat, thanks to a stock voltage.

After setting up the system and installing all the things I actually need (tons of games and XBMC) I’m very satisfied with the final result. Everything feels much smoother and the overall gamin performance has increased a lot. The only thing that bothers me currently is the noise level of the system during gaming sessions. But like I said, this is going to be solved.

The reason why I actually did those changes to the system was mainly the new Batman video game. And my plan worked perfectly well. The game’s now finished and I did not notice any weird performance issues, except the rumble with the Joker and his henchmen and the Catwoman fight in the strong room. Those were more PhysX related and my dedicated 9800GT had a little struggle with these fights.

Whatever the case, I’ve finally got a “debugged” system where everything finally works, which was not the case on the old system. For instance, ‘L.A. Noire’ did not even start. XBMC is working smoothly and I had no issues with exporting and importing the media library data.

Ah, push it! Push it real good…!

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Like I said in my previous blog entry, I’m going to upgrade my gaming rig. As a show of gratitude for my old system I just had to push the last bit of power out of it. I’m currently using two graphics cards in this system that are also going to be in the new system. It’s mainly a replacement of motherboard, RAM and CPU. Graphics card #1 is a Geforce GTX 570 by Point of View and it’s a charged model, which means it’s already overclocked by factory defaults. Stock clocks are 810MHz for the core and 1980MHz for the memory.

Graphics card #2 is a Geforce 9800 GT Green Edition by XFX, which is pretty common without any overclocks. Anyhow, the fan design looks pretty nice on this card. Stock clocks are 550MHz for the core and 700MHz for the memory.

I was able to push the Geforce GTX 570 up to a 880MHz core clock which is pretty good, if you consider that the stock core is actually 725MHz on a completely non-overclocked graphics card. The Geforce 9800 GT received no more than a fifty MHz overclock to the core and no overclock to the memory. So far so good, but I wasn’t very happy with these results and I also wasn’t very satisfied with the fact that all these overclocks happened in software only by using the MSI Afterburner.

After some research I finally found a version of NiBiTor that was able to actually handle my BIOS files that I read out with GPU-Z. The Geforce 9800 GT was pretty to modify. I was able to set the core-, shader- and memory-clock on the “main-page” of the program and I slightly adjusted the core voltage to 1.05V to get a little “insurance” on the core.

My Red Led Fan

The Geforce GTX 570 was a little bit more difficult, because I wasn’t just able to adjust the clocks on the main page. NiBiTor offers a sub-menu especially for Fermi CPUs and the bunch of numbers I first saw was way confusing. After a couple of minutes of asking Google I finally found a good website explaining how to adjust the clock speeds correctly and I was ready to let the editing begin. I also had to adjust the minimum and maximum voltage on the core for two simple reasons. #1 – I wanted to get a little bit more coolness in idle mode so I decided to undervolt my card a tiny little bit from 0.92V to something around 0.85V without any stability issues. #2 – I wanted to increase the maximum headroom by increasing the voltage in 3D performance mode. The defaults were around 1.062V and I decided to bring it up to 1.151V and the maximum allowed voltage was set to a value beyond 1.2V which I probably never going to use. Damage risk, you know?

I knew what my cards were able to do in the past and I did not have to experiment that much to find the stable clock values. So the final results on my cards have been the following. The Geforce 9800 GT now runs with a clock core of 725MHz and a memory clock of 900MHz. I did not wanted to push the memory to far because it simply wouldn’t make any sense. You always have to consider that this card is used for PhysX only.

The Geforce GTX 570 got a real blast. The core now runs stable on 950MHz and the memory was pushed slightly to 2150MHz. That’s an increase of 31% compared to the stock clocks given by Nvidia. 3D Mark 2011 increased by 400-500 points. The average score on factory default clocks was around 5,300-5,400 and after overclock around 5,900 points. Unfortunately wasn’t I able to kick it beyond the 6,000 point mark. I’m pretty sure I can push the final score on the new system to something between 7,000 and 7,500 points. I’ll keep you informed.

Closet cleaned

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Last weekend stood under the flag of rearrangement and getting rid of some useless things from the past. Out of a clear blue sky I decided to sort out some of my old IT books to get some space to place the old books of my grandfather inside my bookcase. Seriously, I don’t need a book about Novell DOS 6.2 or MS DOS anymore and if I’ll feel that urgent need to find some information about this ancient operating systems I would find much more knowledge bases on the net than in a single book. And due to fact that I stopped coding in 2005 I thought that there’s no more need for books like C++ and shit like that. I finally made it in nearly five hours of pure bookcase management to find a worthy place for every book. My beloved game strategy guides are now on eye height and everything else is well sorted and easy to find.

Secondly did I finally made it to exchange the mainboards of my internet PC with the one built in in my media center PC. I did this because the board of my internet PC offers two 16x PCIx slots and I wanted to use one graphic card as a dedicated PhysX accelerator like I do in my gaming system (GF260+GF9800GT). The exchange went better than expected, the systems are still working, except for some pulse server bugs on Fedora. The bug in Fedora is not a major one because Fedora 14 is going to be released this week and I don’t want to do an upgrade, I feel like re-installing the system by keeping the home folder, like I did several times in the past. The whole setup procedure runs pretty fast, because all that is left to do after the core setup routine is to install the missing packages, every application is already configured in my home folder.

Unfortunately do I have to run my Linux internet system with a crappy GeForce 8600GT because this graphic card knows a nothing about PhysX so I had to place my GF9800GT in my media center for a while till it is getting replaced by a new PhysX dedicated card. I’ll also replace the cpu fan of my media center because the stock one sold by AMD is a kind of cheap and noisy and is going to be replaced by an Arctic Cooling Xtreme Freezer Rev.2. Hopefully the noise will disappear after that and the AMD Phenom II X4 965 will feel comfortable without making too much noise. Anyhow, the whole media center is going to be much quieter than it is now.