I've not had the iFly long only about 4 or 5 days so I only had one patch to install anyway, I still think the NGX is better FPS wise, I just wish the NGX was easier on memory requirements then there wouldn't be so many OOM episodes, I even get them on climb out from an airport if it was a particulary long (1hr) preflight.

Funny you should say that the iFly is less resource hungry, in my experience the NGX is better frame rate wise. In the cruise I get about 50% higher frame rate in the NGX. I like both of them very much but lately I've been flying the iFly more as it's much more stable simulation, I've only had 1 OOM episode and zero CTDs, I wish I could say that about the NGX.

When I say resource hungry, I don't mean frame rates necessarily, more how much it taxes your system overall, and there is no doubt the PMDG one needs a gutsier computer on that score, although to be fair, I've had the PMDG on a two hour flight with EFB, TOPCAT, Radar Contact, FS Passengers, ASE and REX all running with it, and apart from a few slightly laggy texture loads on the engine nacelles and the tailfin when I switched to an external view, it performed admirably well. I can certainly sympathise with people who are having issues with either aircraft, but it really is mostly the user's computer and the detail choices one makes that are at the heart of how well the things will run, and I know I can get away with more when using the iFly. Al

I am avoiding the additional purchase because I buy almost everything that gets released, but fly almost nothing...

... but I can't help thinking about the irony that PMDG posted a picture of their cockpit a while back under the title of 'this is what an NG cockpit really looks like' as an obvious dig at iFly, only for us to find that it actually isn't what an NG cockpit looks like in at least that one minor detail LOL...

Indeed.

I am avoiding the additional purchase because I buy almost everything that gets released, but fly almost nothing...

Same here lol...Gettin rid of the iFly and keeping that money for the NGX is the best move I've done in months. I even took the extended download service for the first time! It is uch a GREAT add-on...There's no way I would continue flying the iFly after the NGX... Personal taste of course.

I don't see why locking FPS with the external limiter would harm FPS, but i'll give it a try, thanks

Just tried it by removing FPS limiter but didn't change a thing. Still same mouse-over FPS drop

I have both and I think they are both excellent products. I find the Ifly product to be more predictable. It is easier for me to get it to do what I want. Keep in mind I have been flying the Ifly 3 months longer so that may have something to do with it but I don't recall having these little odd behaviors like I do with the pmdg product. I get the odd glitch from the pmdg product but that is likely more to do with me missing a step or something like that. I really like the way pmdg has tied so much functionality into the CDU and the level of cockpit lighting control. I like the Ifly's 2d panels especially having a thrust panel. I think it is a shame pmdg did not include a 2d thrust panel. I prefer pmdg's use of hot spots on the main 2d panel to bring up sub panels. I think it is a shame Ifly did not include a small external lighting panel like pmdg did. The pmdg has gone a little further in almost every way than the Ifly has but for me it does not add up too significantly......yet. So which plane do I fly more often this week? The IFly by about 2 to 1. Why? Because Ifly is the best 737-600 and 737-700 airplane available for FSX at this time. I prefer routes to smaller communities and airports. Eric

I second etrjazz, the ifly is more predicable and I have less issues with other addons than the PMDG. The PMDG is graphically very very good (far better than the ifly)I'm not sure about the systems modeling although the PMDG does have more systems functionality. I've actually encountered more issues with PMDG systems modeling than IFly: Brake temp, CWS autopilot mode, VNAV descent path calcs.The ifly IS less frame rate hungryThe ifly has an API, so I can fly with FS2Crew (This is a big plus for me)The Ifly appears to be less resource hungry than the PMDG.The PMDG still has some major issues: crashing, LNAV hold instability in cross winds (Very bad at cruise altitudes unless you tweak the turbulence and wind settings which results in very little turbulence at all, not very realistic) All in all, the PMDG is not worth the extra money (Yet) if you like eye candy, then sure buy it, for me it would be better with less attention to detail and more attention to programmatic integrity, software performance and less bugs.....

I second etrjazz, the ifly is more predicable and I have less issues with other addons than the PMDG. The PMDG is graphically very very good (far better than the ifly)I'm not sure about the systems modeling although the PMDG does have more systems functionality. I've actually encountered more issues with PMDG systems modeling than IFly: Brake temp, CWS autopilot mode, VNAV descent path calcs.The ifly IS less frame rate hungryThe ifly has an API, so I can fly with FS2Crew (This is a big plus for me)The Ifly appears to be less resource hungry than the PMDG.The PMDG still has some major issues: crashing, LNAV hold instability in cross winds (Very bad at cruise altitudes unless you tweak the turbulence and wind settings which results in very little turbulence at all, not very realistic) All in all, the PMDG is not worth the extra money (Yet) if you like eye candy, then sure buy it, for me it would be better with less attention to detail and more attention to programmatic integrity, software performance and less bugs.....

And what abouit when the SP1 gets released in a few days ? Most of those issues you mentioned will be academic, including low res textures for the memory impaired. Who said FS2crew won't be available for the PMDG ? It will once the SDK is released. FS2 Crew was not released the same day as Ifly 737 either. System modeling is spot on in the PMDG, think you might have thrown the baby out with the bath water on this one Paul. I am not bagging the iFly either, it serves a niche market, but to compare it to the PMDG is folly if you don't realise that the two products are miles apart.

...The PMDG still has some major issues: crashing, LNAV hold instability in cross winds (Very bad at cruise altitudes unless you tweak the turbulence and wind settings which results in very little turbulence at all, not very realistic)...

The problem with the turbulence in FSX is that its nothing like real life turbulence at all. There is no real life effect similar to the FSX turbulence. Turning turbulence completely off makes the sim far more realistic than keeping it on

I second etrjazz, the ifly is more predicable and I have less issues with other addons than the PMDG. ...The ifly IS less frame rate hungryThe ifly has an API, so I can fly with FS2Crew (This is a big plus for me)The Ifly appears to be less resource hungry than the PMDG.The PMDG still has some major issues: crashing, LNAV hold instability in cross winds (Very bad at cruise altitudes unless you tweak the turbulence and wind settings which results in very little turbulence at all, not very realistic) All in all, the PMDG is not worth the extra money (Yet) if you like eye candy, then sure buy it, for me it would be better with less attention to detail and more attention to programmatic integrity, software performance and less bugs.....

Well all the above is your opinion and your experience.Mine differs. I never had problems with the pmdg 737NGX (actually I had one but it was fixed right away with a hotfix), performance could not be better.The NGX works smoother than the ifly here. I don't think the NGX is expensive.However if you rather have quantity over quality then maybe yes you are right and you should stick to ifly

I dont know if quality is the correct expression to describe the NGX ... it has as many bugs as the average Captain Sim product, lol!

I think the most disturbing thing about the NGX are the fans. We don't know what SP1 will bring, we can only assume and hope for things. But some of us already write known problems being present since 4 Hotfixes down to an 'academic' nature.I'd say that this word shouldn't belong to your vocabulary if you use it on future/assumed/wished items only. So why not wait and see? Nobody questioned the potential of the nice NGX, but some sources (including the PMDG forums) currently show a lack of quality and support attitude in regard to another established product.Lets call it competition for a reason. Seems like the 3 hour test flight from the Avsim Gold Star review actually awarded the potential and the 'system depth' myths only by the way. Maybe SP1 helps there though, but we don't know. I hope it's worth the wait, would be nice. Are the activation problems ruled out by now?

I had a Flight with NGX last time and it was really nice experience but then at 5 Nm fully establish for landing sudden a CTD it was a G3D.DLL another time i menage to land but then a freeze of instrument didn't let me vacate the runway.The bad mistake from PMDG is optimization, all the aircraft are really demanding with latest expensive PC and the lacks of SDK since day one which should be complementary with the product due to the desire to simulate in depth and not just run with a joystick.Also why don't still update further old aircraft the 747 in fsx it's an FS9 porting the MD11 can be still optimize.

I had a Flight with NGX last time and it was really nice experience but then at 5 Nm fully establish for landing sudden a CTD it was a G3D.DLL another time i menage to land but then a freeze of instrument didn't let me vacate the runway.The bad mistake from PMDG is optimization, all the aircraft are really demanding with latest expensive PC and the lacks of SDK since day one which should be complementary with the product due to the desire to simulate in depth and not just run with a joystick.Also why don't still update further old aircraft the 747 in fsx it's an FS9 porting the MD11 can be still optimize.

Incorrect on the 747, it is fully fsx native. The MD11 is highly optimized for performance, and only has a couple of small details that could be corrected. Supposedly, the 747 is going to get a makeover to bring it up to the NGX level of detail.

Incorrect on the 747, it is fully fsx native.

Sorry no way