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I come to you in my hour of need - Inexplicable lag on a homebuilt rig

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August 31, 2010 12:03:37 AM

Greetings all.

I have built computers for many years, so this is certainly not my first time around the block.

Here is what I have in my rig right now:


GIGABYTE GA-MA790X-UD4P AM3/AM2+/AM2 AMD 790X ATX AMD Motherboard

SAPPHIRE 100269HDMI Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card

AMD Phenom II X4 940 Black Edition Deneb 3.0GHz Socket AM2+ 125W Quad-Core Processor HDZ940XCGIBOX

SeaSonic S12 Energy Plus SS-550HT 550W ATX12V V2.3 / EPS12V V2.91 SLI Certified CrossFire Ready 80

CORSAIR XMS2 2GB (4x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model TWIN2X2048-6400

Western Digital Caviar SE16 WD3200KS 320GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive -Bare Drive


Not a shabby build by any means, and so far as I can tell all bios/jumper settings are correct.

However I am getting some pretty funky lag when playing games like StarCraft 2 and Modern Warfare 2 even on medium settings or less.

I have multiple case fans (and in a well ventilated area), but I do only have stock fans for the components but no overclocking.

I have just purchased 3dMark06 Advanced and am running a full scan to which I will post a link of with a complete breakdown of system specs shortly.

Cause if I can't figure this out soon I'm just going to sell the whole dang thing and build a new one from scratch.

I appreciate the help!

More about : hour inexplicable lag homebuilt rig

August 31, 2010 12:26:29 AM

Thats a pretty nice rig there and I would think that the games you are talking about are not going to be anywhere near the capabilities of the system.

I have a similar setup of a 940 on an asus m3a78 board with 6gb of ddr2, a 550w psu, and a 4770 graphics card, i run both of those games at 1680x1050 at near max settings.

You mention the word lag? I assume your playing online multi-player? could this problem be due to internet connectivity? have your tried rebooting your modem, router, and computer....etc... have you run a speedtest on your connection? what type of connection do you have?

Hope that helps for you.
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August 31, 2010 12:32:52 AM

I am running a 10mb Down, 2 mb Up cable modem service on a new Wireless N+ router. I have it physically connected to my rig using the MB Nic.

The results of my speed tests during the times I experience lag are right where they should be.

It is definitely PC based lag and not internet based lag such as packet loss or intermittent connectivity.
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September 1, 2010 2:55:22 AM

Bump. Any thoughts??
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September 5, 2010 11:46:46 PM

Hmmmmm, still no ideas? Any other websites that you all could refer me to that may be able to assist?
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September 6, 2010 2:40:10 AM

To ceck if it's lag in your connection or with your PC, try the freeware "FRAPS" If your framerate is frequently below 30FPS, it's definitely a problem with your PC.
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