System Bottleneck

6 replies [Last post]
Junkyard Dawg
Junkyard Dawg's picture
Offline
Joined: 02/01/2012
Posts: 23

How do you tell what the bottleneck for your system would be? I am looking to upgrade my current gaming computer with some newer generation graphics cards. I have seen many posts where people that reply say something about the processor, RAM, or chipset on the motherboard is outdated and won't be able to take advantage of the newer technology. I do understand as new technologies become available motherboards and especially CPUs are designed to take advantage of new key technologies (i.e. PCI Express x16 3.0, USB 3.0, SATA 6.0 GB/s). I want to know if there is some reliable way of identifying potential bottlenecks in an existing system or a proposed build. I can discuss my current configuration if you think it will make it easier, but I am more leaning to a means of helping myself identify components that are holding me back, if any.

XFX nForce 780i SLI (LGA 775)
Intel Core 2 Extreme QX9770 (3.2 GHz, 1600 MHz FSB)
4 x PNY XLR8 DDR2 800 MHz (2 GB, 4-4-4-12)
2 x BFG Tech GeForce GTX 295 (Quad SLI)

spawnkiller
spawnkiller's picture
Offline
Joined: 05/06/2012
Posts: 310

it's not a "exact" science, that depens from a lot of factor so a core 2 quad @ 4.05ghz (my PC for example) with 1gb ram @ 667mhz will be bottlenecked by that ram and GPU performance will be affect by that too... but it's not the CPU that is guilty it's the slow ram...

so maybe your system will have bottleneck if you don't match same-range components... ex: low range I3 with a 250$ motherboard and a quad gtx680 config... or top of line I7 with 1gb ddr3 @ 1066mhz (don't know if it's compatible but it's an example) the I7 will never perform because he can't store stuff on ram an always depend on hard disk speed...

In conclusion if you have a quad-core or a dual core but top of the line or overlcocked, 1 GPU is still ok but don't expect SLI or Crossfire with new GPU on that kind of config...

I7 920 ?/GTX680 overclocked VS Core 2 quad @ 4.3ghz/GTX680 stock:
http://3dmark.com/compare/3dm11/3597285/3dm11/3547883

PS: we can't see if I7 is overclocked too but the GPU memory is 3604 vs 3174 for stock so that explain the 400pts difference and you see that core 2 quad always perform well even with the new gtx680...

Gaming PC: MSI Z77A-G45 ::: Intel Core I7 3770k @ 4.83Ghz ::: EVGA GTX680SC Signature ~1300mhz Boost/7122mhz ram ::: 16GB 4*4gb G.Skill 2240mhz CL10 ::: ASUS Xonar DX ::: Crucial M4 128gb (windows) + Intel 330 180gb (Steam games) + 1TB Caviar Black (storage) ::: Cooler Master Silent Pro Gold M1000 ::: Antec P280 ::: Noctua NHU12P SE2 ::: ASUS VE247H ::: Logitech G510 ::: Cooler Master Storm Sentinel II ::: Logitech X530 ::: Steelseries Siberia V-2 Black & gold edition

98% Of people under 25 surround their minds with rap music, if you're part of the 2% that stayed with rock, put this in your signature, ROCK IS BETTER!

spawnkiller
spawnkiller's picture
Offline
Joined: 05/06/2012
Posts: 310

Maybe you can post your config, we'll be able to check with you if there's a problem somewhere or where is the max you can put in without throwing your cash away ;)

Junkyard Dawg
Junkyard Dawg's picture
Offline
Joined: 02/01/2012
Posts: 23

Hey! Thanks for the quick replies. Below is my configuration. Please don't laugh. :-P I was considering upgrading my two graphics cards by replacing them with two GTX 580s. My system seems to run fine with quad SLI on the current configuration, since the motherboard thankfully supports x16 interface across the two PCI Express x16 2.0 slots. Hopefully it will be able to handle SLI on newer GPUs. I'm not expecting to go past the 500 series graphics cards from NVidia, since the 600 series runs on a faster interface speed (PCI Express x16 3.0).

I would like to also note that when I built this system about three years ago, I heard it was good to run your system in a 1:1 ratio with respect to the FSB and memory. The CPU runs on a maximum FSB speed of 1600 MHz. My memory is DDR2 800, which is 400 MHz and two peaks on the timing cycles. I set my motherboard to manually run the FSB at 400 MHz, with a multiplier of 4 (4 x 400 MHz = 1600 MHz). This comes out to everything running at a 1:1 ratio.

XFX NForce 780i SLI (PCI Express x16 2.0 on two of the slots)
Intel Core 2 Extreme QX9770 (Quad core CPU)
4 x PNY XLR8 DDR2 800 2GB (4-4-4-12 timings)
2 x BFG Tech GeForce GTX 295
4 x Western Digital VelociRaptor 150 GB (SATA 3 Gbps interface in RAID 0)

spawnkiller
spawnkiller's picture
Offline
Joined: 05/06/2012
Posts: 310

ha, you have a similar config to me ;) you'll have no problem at all to upgrade to SLI of 560 (2 x 560 are about 2 x gtx295 performance but with DirectX 11) or better i know you'll not have trouble with any card of the "5" series so go with 560 or up 570 or 580 depend on your budget...

Junkyard Dawg
Junkyard Dawg's picture
Offline
Joined: 02/01/2012
Posts: 23

Yeah, I'm really thinking about GTX 580s. I really appreciate your assistance. I feel a lot more comfortable getting those cards knowing my system won't cripple the performance too badly. Thank you.

spawnkiller
spawnkiller's picture
Offline
Joined: 05/06/2012
Posts: 310

yeah i'll upgrade too a 680 soon ;) was really happy too when i was checking benchmark on old rig ;)