The NVIDIA GeForce GTX 980 Review: Maxwell Mark 2
by Ryan Smith on September 18, 2014 10:30 PM ESTThe Test
For the launch of GTX 980 we are using NVIDIA’s press beta drivers for the card, release 334.07 beta. This is the first (semi) public release of the R343 driver set, and coinciding with the release of the Maxwell 2 architecture it also marks the end of support for NVIDIA’s D3D10 GPUs: the 8, 9, 100, 200, and 300 series. Beginning with R343 these products are no longer supported in new driver branches and have been moved to legacy status.
Meanwhile as noted earlier, due to time constraints and hardware problems today we are focusing our coverage on the GTX 980. Next week we will be looking at GTX 980 SLI (hint: it’s fast) and GTX 970.
And on a testing note, as is standard for our reviews we are using our reference Radeon R9 290X for our 290X benchmarks. For this reason we are including both the standard and uber modes for the sake of clarity and completeness. The temperature throttling that the reference 290X suffers from is basically limited to just the reference 290X, as the non-reference/custom models use open air coolers that have no problem dissipating the 290X’s full heat load. Both modes are included for this reason, to demonstrate how a reference 290X performs and how a custom model would perform. At this point you can still buy reference 290X cards, but the vast majority of retail cards will be of the non-reference variety, where the 290X Uber mode’s results will be more applicable.
| CPU: | Intel Core i7-4960X @ 4.2GHz |
| Motherboard: | ASRock Fatal1ty X79 Professional |
| Power Supply: | Corsair AX1200i |
| Hard Disk: | Samsung SSD 840 EVO (750GB) |
| Memory: | G.Skill RipjawZ DDR3-1866 4 x 8GB (9-10-9-26) |
| Case: | NZXT Phantom 630 Windowed Edition |
| Monitor: | Asus PQ321 |
| Video Cards: |
AMD Radeon R9 290X AMD Radeon R9 290 AMD Radeon HD 7970 AMD Radeon HD 6970 NVIDIA GeForce GTX 980 NVIDIA GeForce GTX 780 Ti NVIDIA GeForce GTX 780 NVIDIA GeForce GTX 770 NVIDIA GeForce GTX 680 NVIDIA GeForce GTX 580 |
| Video Drivers: |
NVIDIA Release 344.07 Beta AMD Catalyst 14.300.1005 Beta |
| OS: | Windows 8.1 Pro |
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Viewgamer - Friday, September 19, 2014 - link
To Ryan Smith. How can the GTX 980 possibly have a 165W TDP when it actually consumes 8 watts more than the 195W TDP GTX 680 !? please explain ? did Nvidia just play games with the figures to make them look more impressive ?ArmedandDangerous - Friday, September 19, 2014 - link
TDP =/= Power consumption although they are related. TDP is the amount of heat it will output.Carrier - Friday, September 19, 2014 - link
You're right, power consumption and heat output are related. That's because they're one and the same! What else could that electricity be converted to? Light? A massive magnetic field? Mechanical energy? (The fan, slightly, but the transistors aren't going anywhere.)Laststop311 - Friday, September 19, 2014 - link
no they aren't the same. Not all the electricity used is converted to heat. This is where the word EFFICIENCY comes into play. Yes it is related in a way but maxwell is more efficient with the electricity it draws using more of it and losing less of it to converted heat output. It's all in it's design.bernstein - Friday, September 19, 2014 - link
bullshit. since a gpu doesn't do chemical nor mechanical transformations all the energy used is converted to heat (by way of moving electrons around). efficiency in a gpu means how much energy is used for a fixed set of calculations (for example: flops)Senpuu - Friday, September 19, 2014 - link
It's okay to be ignorant, but not ignorant and belligerent.bebimbap - Friday, September 19, 2014 - link
there is "work" being done, as transistors have to "flip" by use of electrons. Even if you don't believe that "input energy =\= output heat" think of it this way100w incandescent bulb produces X amount of useful light
18w florescent bulb also produces X amount of useful light
in this sense the florescent bulb is much more efficient as it uses only 18w to produce the same light as the 100w incandescent. so if we say they produce the same amount of heat, then
100w florescent would produce ~5x the light of a 100w incandescent.
Laststop311 - Saturday, September 20, 2014 - link
ur so smart broGuspaz - Friday, September 19, 2014 - link
The power draw figures in this article are overall system power draw, not GPU power draw. Since the 980 offers significantly more performance than the 680, it's cranking out more frames, which causes the CPU to work harder to keep up. As as result, the CPU power draw increases, counteracting the benefits of lower GPU power draw.Carrier - Friday, September 19, 2014 - link
I don't think that can explain the whole difference. It performs similarly to a 780 Ti in Crysis 3, so the difference in power consumption can only come from the card. The 980 is rated 85W less in TDP but consumes only 68W less at the wall. The discrepancy gets worse when you add losses in the power supply.My guess is the TDP is rated at nominal clock rate, which is cheating a little because the card consistently runs much higher than nominal because of the boost.