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Bottlenecking a GPU?

Last response: in Graphics & Displays
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February 19, 2010 9:07:37 PM

So my housemate salvaged some ancient computer parts and wanted to salvage them because he only has a dell vostro laptop. The spec is AMD X2 3800+, Geforce 7800GS, and got his hands on a velociraptor drive because his friend works at WD company(funny how the retail value of this HDD almost outcosts rest of the computer). He told me that he wants to upgrade his GPU. I told him that getting a high-end card for this system won't do any good due to the topic of this thread title but he he still wishes to get something better. I believe he wants to be able to play some FPS games like L4D and CoD:MW2 @ 1680x1050 or 1920x1080.

Question is, would it be possible to run these games at high details @ following resolutions just by upgrading the GPU to something better? What series of GPU cards would you see the highest performance gain without bottlenecking the GPU potential? I was thinking of ~8800GT/9800GT for the particular system but wasn't 100% sure. Any opinions?

More about : bottlenecking gpu

a b U Graphics card
February 19, 2010 9:18:31 PM

http://www.tomshardware.co.uk/agp-radeon-overclocking,r...

This article uses a Athlon 64 X2 3800+ and a Athlon 64 X2 4200+ to simulate an overclock. The cards are 3850s and 4650s of both pcie and agp. You should note that overclocking to 2.6ghz will give a great performance boost and getting anything that is more powerful than the 3850 or 4650 will be bottlenecked.
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February 19, 2010 9:46:30 PM

The 7800gs was only made with an AGP slot. You'd need to get a new motherboard to see a worthwhile performance gain because that card is still pretty fast for an AGP card. The best you could do is put either a 3850 or 4670 in there but make sure you buy the AGP version. I don't know how much faster the system will be with one of those cards though according to Mr. Woligroski, you'll jump 5 tiers in graphics performance. With the system you're working with, I wouldn't upgrade and just save up for a new system. AGP cards cost more and you'll get much more performance from a similarly priced pci-e card.

Toms's GPU Hierarchy Feb '10: http://www.tomshardware.com/reviews/best-gaming-graphic...
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a b U Graphics card
February 19, 2010 10:43:32 PM

paperfox said:
http://www.tomshardware.co.uk/agp-radeon-overclocking,r...

This article uses a Athlon 64 X2 3800+ and a Athlon 64 X2 4200+ to simulate an overclock. The cards are 3850s and 4650s of both pcie and agp. You should note that overclocking to 2.6ghz will give a great performance boost and getting anything that is more powerful than the 3850 or 4650 will be bottlenecked.


A more powerful card (e.g. 4850 or GTS250/9800GTX+/8800GTS) will be bottleneck'ed, but still give more FPS'es than those two you point out.

I got an Athlon64 X2 4400+ s939 @2.53GHz 2GB DDR1@230Mhz and a Sapphire 4890 Vapor-X. I can run everything max'ed out ('cept Crysis, lol) @1280x1024 and 1920x1080 with 60+ FPS.

So, eylee86, just get the best you can buy and think about a replacement when you only get diaporams (or a slide show, lol). The FPS/$ ratio will suck, but still will get more FPS's out of your buy :p 

Cheers!

EDIT: Forgot to add... I owned a X1800XL, then a 4850 and now a 4890, so i've seen the FPS flow of my PC :p 
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a c 376 U Graphics card
February 19, 2010 11:34:55 PM

Just stick with the 7800GS. It's one of the best AGP cards. You could get an AGP HD3850 or HD4670 but it's really not worth it imo.
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February 20, 2010 11:26:00 PM

thanks for the reply guys, i thought that his mobo was Asus A8N-Sli SE... which definitely has PCI-E. maybe i read his system info wrong when i installed his gpu driver.
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a c 376 U Graphics card
February 21, 2010 3:39:58 AM

Well which did you get wrong? The video card or the motherboard?
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