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shadak




Posts: 1097
Location: Prague
PostPosted: Wed, 10th Mar 2010 15:41    Post subject: ATI 5870 strange performance
Sorry I know theres bunch of topics like this but this has been bugging me quite a bit.

My system is C2D @ 3.77 Ghz , 4GB RAM + GTX280 (OC'd)

Now I was thinking about upgrade and since I only use it for games I though Id get a new card and not i7 CPU which was in my mind as well.

So I bought ATI 5870 but for some reason in all the games I tried it had either same or worse performance than GTX280 Sad ... Tested BC2, GTA4, L4D2, Crysis.
I cleaned all the leftovers from nVidia drivers etc, even tried bunch of old ATI drivers + OC and voltage increase. Nothing really changed.

Anyone experienced something similar please ? I already returned the card for full refund as it would be a waste of money but from all the benchmarks I saw 5870 was destroying GTX285 so I thought I would get at least some improvement. Dont get me wrong the current setup performs nicely but I wanted to get something new Smile
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Werelds
Special Little Man



Posts: 15098
Location: 0100111001001100
PostPosted: Wed, 10th Mar 2010 16:24    Post subject: Re: ATI 5870 strange performance
shadak wrote:
Sorry I know theres bunch of topics like this but this has been bugging me quite a bit.

My system is C2D @ 3.77 Ghz , 4GB RAM + GTX280 (OC'd)

Now I was thinking about upgrade and since I only use it for games I though Id get a new card and not i7 CPU which was in my mind as well.

So I bought ATI 5870 but for some reason in all the games I tried it had either same or worse performance than GTX280 Sad ... Tested BC2, GTA4, L4D2, Crysis.
I cleaned all the leftovers from nVidia drivers etc, even tried bunch of old ATI drivers + OC and voltage increase. Nothing really changed.

Anyone experienced something similar please ? I already returned the card for full refund as it would be a waste of money but from all the benchmarks I saw 5870 was destroying GTX285 so I thought I would get at least some improvement. Dont get me wrong the current setup performs nicely but I wanted to get something new Smile


You left the most important detail out: What resolution do you game at?

I'll tell you the main problem with the games you tested though:
- GTA4 = CPU hungry piece of shit, worst game to test a videocard with. My 5870 does just as fine as my 9800GTX because my E8400 limits it to shit. GTA4 is not optimised at all, and actually DOES require a better CPU than you have.
- Crysis has the same problem as the above to an extent; it should be doing better than the 285 though, because the CPU limit kicks in much later here.
- L4D2: CPU hungry game again, I haven't played it in a while but I'll load it up and check the GPU load.

See the trend? Bad games to test it in Razz
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shadak




Posts: 1097
Location: Prague
PostPosted: Wed, 10th Mar 2010 16:30    Post subject:
lol yeah might be the problem Smile I knew about GTA4 so I tried all others. Oh well, will wait for some big CPU+GFX upgrade I guess.

I use 1680x1050 for games btw.
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TSR69
Banned



Posts: 14962
Location: Republic of the Seven United Provinces
PostPosted: Wed, 10th Mar 2010 16:30    Post subject:
can you run GPU-Z and show the 1st tab?
http://www.techpowerup.com/gpuz/

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shadak




Posts: 1097
Location: Prague
PostPosted: Wed, 10th Mar 2010 16:33    Post subject:
I dont have the 5870 anymore but vaguely remember the GPUZ tabs, which part did you want to check ? It all seemed ok tho, the clocks, PCIE at 16x etc. Was an ASUS card.
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TSR69
Banned



Posts: 14962
Location: Republic of the Seven United Provinces
PostPosted: Wed, 10th Mar 2010 16:35    Post subject:
nevermind pwerelds is probably correct in assuming your CPU is the culprit

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Mortibus




Posts: 18053
Location: .NL
PostPosted: Wed, 10th Mar 2010 19:03    Post subject:
had same problem with c2d@3ghz+260gtx, quad did the trick Wink
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shadak




Posts: 1097
Location: Prague
PostPosted: Wed, 10th Mar 2010 20:09    Post subject:
cheers guys, decided to go for i7 upgrade when I save some cash Evil or Very Mad
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Werelds
Special Little Man



Posts: 15098
Location: 0100111001001100
PostPosted: Wed, 10th Mar 2010 21:24    Post subject:
No point.

Really, if you're gaming at 1680x1050 then that's why the 5870 didn't do more. It's completely CPU limited at that resolution. Upgrading to an i7 won't do much either, although at that resolution it'll have more impact than upgrading your GPU.

A C2D is still fine, especially since you've got it running at 3.7 - to see any real benefit from either a CPU or GPU upgrade, you need to start playing at 1920x1080 at the very least whilst turning up every bit of detail Razz
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