When Gaming, Computer Crashes and/or Creates Lag

ConfusedChris

Honorable
Oct 30, 2013
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10,510
So here is gist of the situation:

My roommate and I are PC gamers. Our game of choice is DotA2, an online game made by Valve and played on the Steam servers. Until recently we have had no trouble with our gaming. Recently though his computer began to crash after about 20 minutes of gaming. His computer is not overheating, and has no trouble rebooting. He does not get BSoD. Every time his computer crashes in this way my computer receives a 3 minute long lag spike.

We checked to see if it was caused by Valve's Source Engine by trying Torchlight 2, made by Runic Games using the OGRE game engine, the only similarity is we play both on steam. This caused his computer to crash also.

Thinking that it may have been caused by us playing the same game, he went off-line to play an independently made horror game (I forget which one) while I played DotA 2. His computer crashed again.

Now, we thought it must have just been all games cause this crash. He is participating in Blizzard Entertainment's new Beta for their game Hearthstone, an online TCG, He is able to play this without a problem. I have played DotA 2 while he was playing this before without a problem as well.

Today he downloaded League of Legends, made by RIOT games and similar to DotA 2, he played without his computer crashing but he got the lag spike that I normally get when his computer crashes.

I am not sure if system specs would matter (correct me if I am wrong) but other than software updates we have changed nothing over the past 4 months of everything working fine. Both computers are under a year old. His is Win7x64 mine is Win8.1x64. Our ISP is Comcast, we have their BLAST internet package. If you need any more information please let me know.
 
Solution
sounds like a tcpip issue with not getting a data acknowledgment. TCPIP will retransmit for 4 5 timeout periods before giving up and reseting your connection. total is like 240 seconds.
Often it is caused by a bug in the network driver on the local machine sending a bad packet that is rejected or dropped on its way to the server, your machine waits for the ack and resends the data (up to 5 times, and 5 timeout values) The server does not respond to the bad packet (various reasons for this, one it to block hacking attempts). in the end, a network driver update or secondary netcard with new drivers can work around the issue. You can use Microsoft network monitor to do a sniffer trace of the issue to verify. You can also use some...
start with the simple stuff. malware and virus scan. run hdtune check your hard drive for any smart errors. when a pc drops like his it a power issue. the powwer supply with his gpu max be maxing out and when the power supply gets hot it ripples out or drops below the atx spec. he can try hardware monitor to watch the voltage lines or use a digital volt meter.
 
sounds like a tcpip issue with not getting a data acknowledgment. TCPIP will retransmit for 4 5 timeout periods before giving up and reseting your connection. total is like 240 seconds.
Often it is caused by a bug in the network driver on the local machine sending a bad packet that is rejected or dropped on its way to the server, your machine waits for the ack and resends the data (up to 5 times, and 5 timeout values) The server does not respond to the bad packet (various reasons for this, one it to block hacking attempts). in the end, a network driver update or secondary netcard with new drivers can work around the issue. You can use Microsoft network monitor to do a sniffer trace of the issue to verify. You can also use some internal tools to debug but updating the driver is the fastest fix
 
Solution