AMD Radeon 7950 Flashed to 7970 with Unigine Benchies [ocuk]

[Arzachel]

If the ROPs arnt cutting it, AMD needs to fix its ratio of ROPs to TMU and Shaders.
So theres more ROPs pr TMU/Shader than there is now.

Im kinda suprised at the bandwidth thingy too, is that really whats holding the cards back?

I mean the 7950 comes with 240GB/s memory bandwidth.




Nuts.... thats what? 346 GB/s memory bandwidth?

I cant imagine that its a bottleneck at those speeds....
nor at the 240GB/s or so it comes with at stock.

I mean a 580 only has like 192GB/s memory bandwidth, and the 7950 isnt really *that* much faster than the 580, to warrent needing that much more memory bandwidth, is it?

The ROPs in Tahiti preform around 50% better than those in Cayman, so I don't think that's the bottleneck.

MrK6 said that he saw massive gains from overclocking the memory on the 7970. Seems like Tahiti just loves all the bandwidth you can throw at it 😀

 

[GaiaHunter]

Did you read this

Hi there

Right some odd Heaven results here:-

7950 @ 925MHz / 5500MHz = 1504 points
7950 on 7970 BIOS @ 925MHz / 5500MHz = 1545 points
7970 @ Stock (925/5500) = 1584 points

So even though according to GPU-Z the shaders are not unlocking, flashing to the Asus 7970 BIOS is definetely giving a performance boost, though its not quite at genuine 7970 performance levels, kind of like half way from the results.

So either some shaders are unlocking or the 7970 BIOS is making other improvements, maybe memory timings etc. which is giving the boost.

Still flashing the BIOS is so easy anyway and it would appear the 7970 BIOS is giving some performance enhancement even when clock speeds are identical.

I really expected shaders to make more difference in GCN. The way these new 7XXX series scale perfectly with overclocking - % increase in core = % increase in FPS. That is something we didn't see with 5XXX or 6XXX series, figured it would play out differently.

It is a single bench, synthetic at that.

 

[96Firebird]

I'm assuming this means the 7950 has the dual-BIOS switch as well?

 

[Lepton87]

The ROPs in Tahiti preform around 50% better than those in Cayman, so I don't think that's the bottleneck.

MrK6 said that he saw massive gains from overclocking the memory on the 7970. Seems like Tahiti just loves all the bandwidth you can throw at it 😀

How did you come up with that number? Also MrK6 tests results are strange, only he gets greater speed-ups from overclocking than the frequency increase in either memory or GPU. I haven't seen that behavior on any test site, if you did please link.

 

[AdamK47]

I'm curious to know what the ASIC quality ratings are on the 7950 GPUs.

 

[WMD]

How did you come up with that number? Also MrK6 tests results are strange, only he gets greater speed-ups from overclocking than the frequency increase in either memory or GPU. I haven't seen that behavior on any test site, if you did please link.

I have never seen that as well because that's just not possible. A 10% core and 10% mem oc will never net you 15% performance increase. Either the test are not repeatable or settings have changed.

 

[whelp]

Is it just me or HDMI port is NOT WORKING with 7970 bios on 7950? Can someone report status of mini-DPs?