Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > OK I KNOW PCIE 2.0 IS BACKWARDS COMPATIBLE but...

OK I KNOW PCIE 2.0 IS BACKWARDS COMPATIBLE but...

Forum Graphic & Displays : Graphics Cards - OK I KNOW PCIE 2.0 IS BACKWARDS COMPATIBLE but...

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Cuui   10-23-2009 at 03:09:58 AM

I have a 1.x only motherboard and am looking at buying one of the new gtx models, probably the 275 and I was wondering how much of a diminshment in performance one could expect or how the actual performance specs would be affected. I don't want to spend money if my computer is going to end up limiting what the card can do.

I saw in some forum that somebody said their new gtx card ran the same as an 8600 gt because this issue. Is this true? You'll have to forgive me I'm not smart enough w/ computers to figure out bandwidth and busspeed and what it all actually means.

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FallenSniper   10-23-2009 at 03:19:37 AM

The performance loss is very minimal. To put it simply... Any loss in performance you have will be negligible and the card will still be worthwhile. ^^

------------------------------ Yes I listen to kpop
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Bronze Graphics badge shadow187   10-23-2009 at 03:20:34 AM

First of all, for around the same price of a GTX275, you can grab an HD5850. This card is much faster, boasts DX11, and uses a low amount of power.

Second, IIRC, a 5870 saw a loss of 1% performance when switched to a PCI-E2.0 8x slot (the equivalent of a PCI-E1.0 16x). So no, you should be just fine.

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Bronze Graphics badge EXT64   10-23-2009 at 05:15:24 AM

The loss is minimal, if any. Back in the day they posted a example for an older card all the way down to 4x and 1x and it ran surprisingly well. The only cards really pushing the limit are the dual and perhaps the 5870. I'll go try to find the article.

------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
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Bronze Graphics badge Bluescreendeath   10-23-2009 at 05:16:33 AM

GTX275s costs around $200, 5850s cost around $260

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Bronze Graphics badge EXT64   10-23-2009 at 05:21:43 AM

Here's one Article:

http://www.tomshardware.com/review [...] ,2095.html

------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
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