Overclocking the GV-N250ZL-1GI Using Gigabyte’s Gamer HUD Lite
Because Gigabyte doesn’t offer any voltage control for the GV-N250ZL-1GI, overclocking the card is a very straightforward affair. Just increase the clocks and stress test for artifacts. No artifacts? Increase the clocks some more. Artifacts present? Decrease the clocks. Rinse and repeat.
Gigabyte claims a 10% to 30% increase in overclocking ability over competing GeForce GTS 250 cards. That’s a pretty tough thing to measure, seeing as how every card will overclock a little differently. How will we put that to the test? With colossal variances in every card, let’s throw together a useless and pseudo-scientific methodology just for fun.
First off, we have to consider that the GPU in the GTS 250 is already close to its ceiling at stock speeds. Remember, this is the exact same GPU as the older GeForce 9800 GTX+, which is itself an overclocked and die-shrunk GeForce 9800 GTX released with an original 675 MHz clock speed. It’s not uncommon for a GeForce GTS 250 to top out under 780 MHz with stock cooling.
For the sake of argument, let’s say most cards can make it to 800 MHz, which is a 62 MHz overclock. So, for Gigabyte’s claim of a 10% overclocking increase, we’ll say that most GV-N250ZL-1GI cards should be able to get to at least 806.2 MHz on the GPU. Hey, let’s round it up to 807 MHz to keep things clean. Did the GV-N250ZL-1GI beat the spread?
It sure did. With absolutely no modifications except to raw clock speeds, our sample GV-N250ZL-1GI made it to 815 MHz rock-solid stable. That’s a 20% increase over an "expected" overclock according to our unscientific calculation.
In all seriousness, an 815 MHz core clock and a 1,925 MHz shader clock are very good results for a stock GeForce GTS 250 without as much as a fan-speed increase. Sure, the 2,210 MHz memory overclock could have been better, but memory is often more of a challenge.
Of course, we have to question how much the Ultra Durable VGA feature is responsible for this overclock compared to the sweet, quiet Zalman cooler. But the bottom line is that for whatever reason, the GV-N250ZL-1GI gave us a respectable overclocking result. Now, let’s see where those overclocks get us when it comes to performance.
Hi rags_20 -
Actually, the appearance of the card in that picture is caused by barrel or pincushion distortion of the lens used to take the photo. The card itself isn't bent.
looks bad... and eratic. and makes the forums/coments system
more clutered than need be.
ps. your not running the same bench markes as Toms so your not really comparable.
yes, same game and engine, but for example in crysis, the frame rates are completely different from the start, through to the snowey bit at the end.
pps. are you comparing your card to there card at the same resolution?
I've been looking for a comparison like this for several weeks. Thank you although it didn't help me too much in my decision. I also missed some comments regarding the Physix, Cuda, DirectX 10 or 10.1 and Havok discussion.
I would be very happy to read a review for the Gainward HD4850 Golden Sample "Goes Like Hell" with the faster GDDR5 memory. If it then CLEARLY takes the lead over the GTS 250 and gets even closer to the HD4870 then my decision will be easy. Less heat, less consumption and almost same performance than a stock 4870. Enough for me.
btw. Resolutions I'm most interested in: 1440x900 and 1650x1080 for 20" monitor.
No, its classified as a C2Q. E6600 is classified as C2D.
Directly from the article on page 11:
Clearly this is not an ideal setup to eliminate the processor from affecting benchmark results of the two cards. Most games are not multithreaded, so the 2.4Ghz clock of the Q6600 will undoubtedly hold back a lot of games since they will not be able to utilize all 4 cores.
Stop triple posting!
Later in the article you write,
Your math is wrong. A claim of 20% over clock on the GV-N250ZL-1GI would equal 885.6 MHz. 10% of 738MHz = 73.8 MHz. So a 10% overclock would equal 811.8 MHz. 815 MHz is nowhere near 20%. In fact, according to your numbers, the GV-N250ZL-1GI barely lives up to its 10% minimal capability.