Yes, but even adjusting for this would have the R9 270X superior to the 7870 XT by ~1%.The 7950 was 10% faster than the 7870 during the 7870 XT reviews. In the R9 270X review the difference is 9%.
Ah, I missed that. In the TPU review the 270X sets the Core Clock to 1050 MHz. That is 5%. I don't see where you're getting 16% on the memory. Reference is 1400 MHz, and that was the clock in the TPU review: no overclock there.The R9 270X is OC 5% on the core and 16% on the memory.
Wait, what? Shouldn't the more robust/wider architecture of Tahiti LE (in the 7870 XT) benefit more from overclocking the core- at least per MHz- than for Pitcairn aka "Curacao" (in the 270X)? Both were boosted 50 MHz on the core in the TPU benchmarks; in fact, that's actually a 5.4% OC for the 7870 XT compared to a 5% OC for the 270X.At stock clocks the 7870 XT isn't much faster than the 7870 - since the 7870 is clocked higher it has a higher pixel rate (32 vs 29.6) and the Tahiti Achilles heel seems to be in that department (even the 7970 has problems to create a gap to the 7950 at high clocks), but once you overclock the differences between the 7870 XT and the 7870/R9 270X are bigger.
This may help back up Rvenger. This is not the whole story, but take it for what you will.
Yes, but even adjusting for this would have the R9 270X superior to the 7870 XT by ~1%.
Ah, I missed that. In the TPU review the 270X sets the Core Clock to 1050 MHz. That is 5%. I don't see where you're getting 16% on the memory. Reference is 1400 MHz, and that was the clock in the TPU review: no overclock there.
Wait, what? Shouldn't the more robust/wider architecture of Tahiti LE (in the 7870 XT) benefit more from overclocking the core- at least per MHz- than for Pitcairn aka "Curacao" (in the 270X)? Both were boosted 50 MHz on the core in the TPU benchmarks; in fact, that's actually a 5.4% OC for the 7870 XT compared to a 5% OC for the 270X.
Also, is that really the gist of it? You take a 925 MHz 7870 XT boosted to 975 MHz, and it will underperform against a 1000 MHz 270X boosted to 1050 MHz? Despite all those other advantages? That still doesn't seem right.
The price signs are for dollars, F2F, but the "eu info" links make me suspicious. There's been two leaks, so far, on 290X pricing: TPU had it at $729; Tom's Hardware placed it at $799. I know those are dollar signs, but the "eu info" buttons have me skeptical. Just the rumored specs on the 290X so far alone make the likelihood that they would price it $75-$125 below the current low-end range for the GTX 780s highly, highly unlikely, IMO. They see it at a competitor to the Titan, I'm sure.
550$ 290X would be great! I just kinda question the mere 50$ difference between the 290X and 290 if that is true. Strange to say the least, i'd expect a 100$ difference, if anything.
The price signs are for dollars, F2F, but the "eu info" links make me suspicious. There's been two leaks, so far, on 290X pricing: TPU had it at $729; Tom's Hardware placed it at $799. I know those are dollar signs, but the "eu info" buttons have me skeptical. Just the rumored specs on the 290X so far alone make the likelihood that they would price it $75-$125 below the current low-end range for the GTX 780s highly, highly unlikely, IMO. They see it at a competitor to the Titan, I'm sure.
I'm not talking about the original 7870, I'm talking about the 7870 XT which has entirely different architecture (Tahiti LE vs. Pitcairn) in addition to different reference clocks (925/1500).R9 270X
1050/1400
7870
1000/1200
5% higher core and 16% higher memory - that explains why the R9 270X is on par with a 7950 while before it was 10% slower.
Really, that's meaningless. Once you OC a 7870 XT to 1000, you've overclocked it ~8%. Sure, it would outperform a stock 270X at that clock. However, what happens when you OC the 270X 8% to 1080? The 7870 XT falls behind again? As I outlined above...the 7870 XT core-boosted 50 is getting edged by a 270X boosted the same amount.Once you get that 7870 XT to 1000 or a 1050 it will beat a R9 270X and a 7870 and even a stock 7950.=
Thus, any overclock to the Tahiti should yield superior performance increases over equal overclocks in Pitcairn. So why is the Tahiti 7870 XT boosted 5.4% to 975 losing to a Pitcairn/Curacao 270X boosted 5.0% to 1050?It is all in the pixel rate - the Tahiti is bottleneck there.
This may help back up Rvenger. This is not the whole story, but take it for what you will.
I comprehend the shader calculation. That makes sense. I also comprehend the unwritten ROP calculation:It will depend of the game - if the game is shaders limited, the 7870 XT will just pull away.
975*1536=1497600
1050*1280=1344000
That is 11% more shader power but less 7.8% ROP power for the 7870 vs the R9 270X.
I comprehend the shader calculation. That makes sense. I also comprehend the unwritten ROP calculation:
7870 XT > 975*32= 31,200
R9 270X > 1050*32= 33,600
Nevertheless, I was under the impression that shader performance had become the prime fillrate consideration in the gaming world, and operating under that assumption, one would assume that the 7870 XT would get a serious boost in the benchmarks from that advantage.
Furthermore, the 7870 XT memory is clocked at 1500, not 1400, in addition to having more TMUs, so you'd think at these relatively higher resolutions that any texture-heavy games would again see a serious advantage for the 7870 XT. It boasts outright superior processing power.
Yet the 270X outperforms it even with a shared 5% boost. A 75 Mhz core clock overcomes all those advantages. Just seems strange.
I dont know if anyone noticed it, but it stroke me as a surprise AIBs are marketing mantle as a feature in their SKUs descriptions, take http://www.newegg.com/Product/Produc...82E16814161440 as an example. I tought it was a bell only for AMD to drum (at least, at this time with just 1 game confirmed and really no information besides a few slides).
Mantle There’s optimization, and then there’s Mantle. Games enabled with Mantle speak the language of GCN architecture to unlock revolutionary performance and image quality. (Application support is required.)
Mantle support on all current GCN cards, no reason to upgrade if you already have a 7xxx series card, Mantle will keep us relevant for eight plus years!
http://www.webhallen.com/dk-da/hard...90x_4gb_battlefield_4_bundle_limited_edition/
Listed price (That used to be 9999 DKK) from a subbrand of the largest nordic gamerhardware e-tailer.
There is noway in hell r290x is close to 500 USD, if this price is correct.
Taking recent launches in effect from MSRP US to MSRP Nordic - were looking at 800 ish, such 799 seems correct.
8,529.00 DKK = 1,551.44 USD
http://www.webhallen.com/dk-da/hard...90x_4gb_battlefield_4_bundle_limited_edition/
Listed price (That used to be 9999 DKK) from a subbrand of the largest nordic gamerhardware e-tailer.
There is noway in hell r290x is close to 500 USD, if this price is correct.
Taking recent launches in effect from MSRP US to MSRP Nordic - were looking at 800 ish, such 799 seems correct.
8,529.00 DKK = 1,551.44 USD