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Author Topic: Knowing your system's bottleneck.  (Read 1629 times)

Online Arinoth

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Knowing your system's bottleneck.
« on: May 19, 2014, 01:46:51 PM »
I have been slowly upgrading my system lately and have discovered that it's not always easy to know what your exact bottleneck is or can be. I have decided to share my experience, to help others realize that sometimes when you think one thing is your bottleneck, it can very well be something else.

Let's start off with what my 'original' system was before the 'upgrade rush' of 2014. I had an Intel i7 2600k which was overclocked at 4GHz, running on a Gigabyte Z68X-UD4-B3 with G.Skill Sniper 2x4 GB 12800 (1600 MHz) DDR3 RAM, Intel 320 160GB (which is SATA 2) and a MSI GTX 560 Ti (with only one fan working).

I was fortunate enough to have access to this past winter's Intel Retail Edge deal, allowing me to pick up an Intel i7 4930K Desktop Processor and Intel  530 Series 180GB (SATA 3) SSD for a great deal. Thanks to Soullessone21, I bought one of his motherboards (MSI X79MA-GD45),  added to my plan of keeping the cost of the upgrade quite low. Selling off the LGA 1155 motherboard and processor also helped with off-setting the upgrade cost. Setting up the entire system I found I was not able to overclock the 4930k that well with the current RAM that I had, able to get to about 3.8GHz.

I began to play games, not really noticing that much of a difference in load time, probably as minor with the upgrade of the SATA3 SSD from the SATA2 one, though nothing that screamed out that I've made  a large performance jump.

Now we get to where I start to 'benchmark' how long it takes to load a level in Mass Effect 2 (namely as I had recently started going through the Mass Effect trilogy). With the most recent setup, I was noting load times between maps or levels to take about 10-15 seconds if it was a large one, and about 5-7 seconds when it was a smaller one. For any gamer, any sort of load time can seem extremely long, so I decided to upgrade my RAM, replacing what I had with g.SKILL Trident F3-2400 (2400MHz) 4x4 GB Quad Channel Memory. This allowed me to not only overclock my 4930k to 4.0 GHz (I am just running on air), it also cut down the loading time to about 6-9 seconds on large levels and 3-4 seconds on small levels.

As I plan to do some video game reviews soon, Soullessone21 sent me over a MSI GTX 770 to replace my slightly aged GTX 560 Ti. Now this is where I noticed the largest load time improvements. By that I never see the loading screen, large levels or small levels load within a second.

Sure upgrading from a Sandy Bridge to an Ivy Bridge-E may not much of an upgrade in processing power for games, same goes with upgrading from 1600 MHz RAM to 2400MHz RAM, the more important upgrades I noticed were going from a SATA 2 to a SATA 3 SSD and a GTX 560 Ti that may only be working at 3/4 to 7/8 of it's normal performance to a fast and silent GTX 770. So remember, just because you think something is your bottleneck or is slowing down your system, it may not always be the case.

Offline trodas

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Re: Knowing your system's bottleneck.
« Reply #1 on: May 19, 2014, 02:54:48 PM »
Congratulations for good upgrade! And you have a good point. Who could have quessed that the GFX card is the main bottleneck in loading times, right?

But actually... I would quessed that. Because the loading is not just about getting the data from HDD to RAM (any faster HDD, RAMs and CPU are welcome, but that is just the easy part) - the main part is getting the data to the GFX card memory and that is where things get complicated.
I remember, that back in old times, both nVidia FX5200 and ATI R9100 are almost similary "powerfull" cards, yet on ATI games loaded much slower, as the textures have to be "on the fly" converted before stored in Radeon memory, witch make the game (SoF2 in this case) load way slower.

Hopefully nothing like that could happen todays, still the textures could be for example compressed jpegs and need to be decompressed and loaded into the videoram thru the bus, witch need CPU time, RAM speed and PCIE bus speed as well, as the GFX card can accept the data "freaking fast" :)

BTW, congratulations to that nice GTX 770 upgrade!
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Re: Knowing your system's bottleneck.
« Reply #1 on: May 19, 2014, 02:54:48 PM »

Offline Bond007

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Re: Knowing your system's bottleneck.
« Reply #2 on: May 25, 2014, 06:34:55 PM »
Thanks for the info. I always thought vram speed would have an impact on game load times, but I did not think it would be that substantial.

Soullessone21 sent me over a MSI GTX 770 to replace my slightly aged GTX 560 Ti.

He just sent you a 770...lol. That's a good deal. You must have also seen a massive improvement in fps with that jump.

Enjoy...nice build!
Desktop: Arc Midi R2, Z77-D3H, 3570K @ 4.1ghz undervolted with Zalman Optima Cooler, Vengeance 2x4gb @ 1866mhz, XFX R9 280X DD, Fury 750w, WD Black 1TB, Intel 530 120GB

Away from home light Gamer: Aspire 15.6", A8-3500m undervolt and OC to 2Ghz, Vengeance 2x4gb, M500 240gb,

Offline Jadall

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Re: Knowing your system's bottleneck.
« Reply #3 on: May 25, 2014, 08:33:41 PM »
yeah first time I loaded mafia game up after I ran settings again (for game) right after graphics card install I was like WHOA. load time from like 10-15 seconds to like maybe 2 seconds. and I realized too I have an additonal whatever my card speed is 650 mhz chip instead of it in my case loading through the onboard graphics makes sense now what you guys are saying.

On the previous system the agp 1.0 64 mb graphics card was not seeming to do much vs that computer's 32 mb onboard graphics and when I first got the my current computer I have now was running them both computers (move my files around etc) and ran it off the onboard graphics and noticed some stuff ran better?? so in that particular case the graphics card supposidly better was not better.

Offline GaK_45

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Re: Knowing your system's bottleneck.
« Reply #4 on: May 30, 2014, 01:40:27 AM »
When it comes to games 7 time out of 10 its your storage subsystem.  2 out of 10 is the GPU and the last zinger is CPU/ram.

Even going to a SATA 3 SSD (good choice BTW)...its still slow enough to notice load times.

The only way around this major bottleneck is to either use a Ram Drive...or buy a M.2 or PCIe SSD.  A decent M.2 (NGFF) will boost load time performance above the best SATA 3 drives.  A PCIe...will blow it out of the water (BUT I dont consider the M6e by plextor to be a PCIE ssd...form factor be damned its a M.2 + adapter card drive). 

IF you cant afford that kind of coin...RamDrive 'tis the only way to play. ;)
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