The NVIDIA GeForce GTX 970 Review: Featuring EVGA
by Ryan Smith on September 26, 2014 10:00 AM ESTSynthetics
As always we’ll also take a quick look at synthetic performance. These tests mainly serve as a canary for finding important architectural and configuration changes.
Tessellation performance has scaled very closely with the change in SMMs and clock speeds, just as we would expect here.
Texel throughput has also taken a hit in accordance with the loss of SMMs and clock speed. Based on gaming performance the GTX 970 doesn’t appear to be too badly handicapped here, but it definitely doesn’t have much in the way of texel throughput to spare.
Pixel throughput on the other hand ends up being extremely odd and not at all what we were expecting. The GTX 970 takes an incredible dive here, with its pixel fillrate dropping by 26%. At a high level this test is bounded by memory bandwidth and ROP throughput, and both of these factors should be identical between GTX 980 and GTX 970. Instead we see GTX 970 lose more performance than should theoretically be possible, as the 26% drop is more than the accumulated difference between the clock speed and SMM differences.
At this point we’re still trying to figure out exactly what’s going on. We have no other evidence that there’s a difference in ROP throughput or memory bandwidth between the GTX 980 and GTX 970 so it is not clear to us where the difference lies. One possibility is that this is somehow bottlenecked at the Raster Engine level – where each of the four engines accounts for 25% of the work – but the pigeonhole principle means that NVIDIA can’t disable a GPC since at least 1 SMM must be active in each GPC partition. This matter will require further research.
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wetwareinterface - Saturday, September 27, 2014 - link
they did it because they have customers with at most one dp monitor and if using multiple monitors most have dvi still. also they have all these connectors they bought up laying around so....Gigaplex - Monday, September 29, 2014 - link
It's trivial to convert from DP to DVI but not the other way around.Mr Perfect - Monday, September 29, 2014 - link
Hmm, it has a blower too. It looks like their own design though, I wonder if it matches the 980's blower in noise and cooling.ggathagan - Friday, September 26, 2014 - link
Gigabyte's version has the same I/O setup as the 980Mr Perfect - Monday, September 29, 2014 - link
Good find. That one's an option then.HanzNFranzen - Friday, September 26, 2014 - link
Well, it was quite a run for me and AMD. I was a GeForce user back in the day with the Geforce 2 and then the Ti 4600. In 2002 I switched up to AMD when they released the 9700 Pro and never looked back. I have been waiting and waiting for the R9 cards to drop in price to go into my new X99 build. I waited for these 900 cards thinking the response would be somewhat quick as far as an announcement for a competing Radeon or at least a price drop for the 290X. But it never came. (Except that the 390 may be factory water cooled.... which was an "uh oh.." in my mind as far as heat and power is concerned). So 12 years later, I am now back to NVidia as I just ordered my GTX 980 yesterday. I think that NVidia finally released a card at a price and power consumption that just cannot be ignored. A truly impressive feat they have pulled off with the Maxwell line, and I have chosen to reward that effort with my business. Who knows, MaxWELL in a HasWELL-e build... perhaps fate was involved? It is to be named my Wellness system =P Will be quite an upgrade from a i7 920 and 6950. I can't wait to get it assembled!! And by the way, thanks for the 2 great reviews Ryan!wetwareinterface - Saturday, September 27, 2014 - link
i'm curious why you'd spend all that money on a cpu ram motherboard config and then get a gaming card. you could have saved a ton of money and bought 4790, msi gaming series board ddr3 ram and bought 2 980's if gaming is your focus youd have the faster gaming cpu and graphics card setup that way.HanzNFranzen - Saturday, September 27, 2014 - link
I would agree if I were a 'tick tock' cadence upgrader, and if gaming were my only focus. I weighed going 4790 for a few months. But coming off of a X58 build that I've owned for 6 years it may be possible that this build stays with me just as long, and I believe a 6 core will be the better option than a 4 core in the long run. As far as a gaming card, this is a desktop build not a workstation.asgallant - Friday, September 26, 2014 - link
Color me intrigued by the 970. I'm considering a pair of these in SLI for 4k gaming (as other reviews indicate they scale quite well), but I'm running a Sandy-Bridge era rig, with x8/x8 PCIe 2 as the only SLI option, and would like to know if I'd run into a PCIe bandwidth bottleneck on these cards. Any chance of a quick scaling test making it into the (assumed to be coming) SLI review?boozed - Friday, September 26, 2014 - link
Improvements in performance and efficiency have finally progressed to the point that it makes sense to upgrade that four year old system. Wow.