The NVIDIA GeForce GTX 750 Ti and GTX 750 Review: Maxwell Makes Its Move
by Ryan Smith & Ganesh T S on February 18, 2014 9:00 AM ESTPower, Temperature, & Noise
As always, last but not least is our look at power, temperature, and noise. Next to price and performance of course, these are some of the most important aspects of a GPU, due in large part to the impact of noise. All things considered, a loud card is undesirable unless there’s a sufficiently good reason – or sufficiently good performance – to ignore the noise.
| GeForce GTX 750 Series Voltages | ||||
| Ref GTX 750 Ti Boost Voltage | Zotac GTX 750 Ti Boost Voltage | Zotac GTX 750 Boost Voltage | ||
| 1.168v | 1.137v | 1.187v | ||
For those of you keeping track of voltages, you’ll find that the voltages for GM107 as used on the GTX 750 series is not significantly different from the voltages used on GK107. Since we’re looking at a chip that’s built on the same 28nm process as GK107, the voltages needed to drive it to hit the desired frequencies have not changed.
| GeForce GTX 750 Series Average Clockspeeds | |||||
| Ref GTX 750 Ti | Zotac GTX 750 Ti | Zotac GTX 750 | |||
| Max Boost Clock |
1150MHz
|
1175MHz
|
1162MHz
|
||
| Metro: LL |
1150MHz
|
1172MHz
|
1162MHz
|
||
| CoH2 |
1148MHz
|
1172MHz
|
1162MHz
|
||
| Bioshock |
1150MHz
|
1175MHz
|
1162MHz
|
||
| Battlefield 4 |
1150MHz
|
1175MHz
|
1162MHz
|
||
| Crysis 3 |
1149MHz
|
1174MHz
|
1162MHz
|
||
| Crysis: Warhead |
1150MHz
|
1175MHz
|
1162MHz
|
||
| TW: Rome 2 |
1150MHz
|
1175MHz
|
1162MHz
|
||
| Hitman |
1150MHz
|
1175MHz
|
1162MHz
|
||
| GRID 2 |
1150MHz
|
1175MHz
|
1162MHz
|
||
| Furmark |
1006MHz
|
1032MHz
|
1084MHz
|
||
Looking at average clockspeeds, we can see that our cards are essentially free to run at their maximum boost bins, well above their base clockspeed or even their official boost clockspeed. Because these cards operate at such a low TDP cooling is rendered a non-factor in our testbed setup, with all of these cards easily staying in the 60C or lower range, well below the 80C thermal throttle point that GPU Boost 2.0 uses.
As such they are limited only by TDP, which as we can see does make itself felt, but is not a meaningful limitation. Both GTX 750 Ti cards become TDP limited at times while gaming, but only for a refresh period or two, pulling the averages down just slightly. The Zotac GTX 750 on the other hand has no such problem (the power savings of losing an SMX), so it stays at 1162MHz throughout the entire run.
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texasti89 - Tuesday, February 18, 2014 - link
http://media.bestofmicro.com/4/R/422667/original/F...texasti89 - Tuesday, February 18, 2014 - link
Also I was referring to the 750ti (60w) not the 750 (55w) in my comment. Words in the article reflect reviewers opinions. Benchmark results from various tech websites give same conclusion.texasti89 - Tuesday, February 18, 2014 - link
Another one to look at : http://www.techpowerup.com/reviews/NVIDIA/GeForce_...tspacie - Tuesday, February 18, 2014 - link
[Coming soon to a flu near you]This is a caching error or similar on page 4, right?
mindbomb - Tuesday, February 18, 2014 - link
Hello Ryan and Ganesh. I'd like to point out for your video tests that there is no luma upscaling or image doubling for a 1080p video on a 1080p display, since luma is already scaled. You need to test those with a 720p video, and they are mutually exclusive, since image doubling will convert 1280x720 to 2560x1440, where you will need to downscale rather than upscale.ganeshts - Tuesday, February 18, 2014 - link
Luma upscaling is present for 480i / 576i / 720p videos and downscaling for the 4Kp30 video. We have nine different sample streams.jwcalla - Tuesday, February 18, 2014 - link
I'd like to see AT adopt some OpenGL benchmarks in the future.Us OpenGL consumers are out here. :)
Ryan Smith - Thursday, February 20, 2014 - link
So would I. But at the moment there aren't any meaningful games using OpenGL that are suitable for benchmarking. After Wolfenstein went out of date and Rage was capped at 60fps, we ended up stuck in that respect.Roland00Address - Tuesday, February 18, 2014 - link
Feel better Ryan, don't let the flu get you down! (Or is it Ganesh T S?)Looks like Nvidia has a 8800gt/9800gt on its hands (for different reasons than the original 8800gt)
Hrel - Tuesday, February 18, 2014 - link
Seriously impressive performance/watt figures in here. Makes me wonder when we're going to see this applied to their higher end GPU's.Looking at TSMC's site they are already producing at 20nm in 2 fabs. Starting in May of this year they'll have a 3rd up. Do you think it's likely May/June is when we'll see Maxwell make it's way into higher end GPU's accompanied by a shift to 20nm?
That approach would make sense to me, they'd have new product out in time for Summer Sales and have enough time to ramp production and satiate early adopters before back to school specials start up.
On a personal note: I'm still running a GTX460 and the GTX750ti seems to be faster in almost every scenario at lower power draw in a smaller package. So that's pretty cool. But since TSMC is already producing 20nm chips I'm going to wait until this architecture can be applied at a smaller manufacturing process. That GPU is in a media PC, so gaming is a tertiary concern anyway.