The biggest problem of Radeon HD 4850 is that this card reaches high temperatures (70 degrees celcius) even in idle (i.e. not loaded). So manufacturers decided to discard the stock cooler in favour of a better and more efficient cooler. In these reviews, the Sapphire’s solution, the Radeon HD 4850 Toxic edition, is analyzed. This Radeon features a Zalman heatpipe fan, providing more efficient cooling, quieter operation and more headroom for performance tuning.
Due to the better cooling solution, frequencies have been overclocked
Toxic Radeon HD 4850 has the following features:
– GPU: RV770
– stream processors: 800
– ROPs: 16
– transistors: 956M
– memory 512Mb / 256-bit
– core clock: 675MHz
– memory clock: 1100Mhz
– DirectX 10 / OpenGL 2.1
However, the Sapphire cooling solution is one of the noisiest cards under idle: around 40db
. But this cooler does its job by keeping GPU temperature at least 20 degrees lower
than a standard Radeon HD 4850.
More information about Toxic HD 4850: Toxic HD 4850 @ Sapphire
More news about Radeon HD 4850: Radeon HD 4850 @ Geeks3D
FiringSquad has reviewed the MSI’s Radeon HD 4850 that runs significantly cooler than ATI’s stock Radeon 4850 reference design. To reach that goal and offer maximum cooling performance, MSI uses four copper heatpipes for cooling the RV770 GPU. With their copper design, the heatpipes are capable pulling quite a bit of heat off the GPU. This heat must then be dispersed in order to prevent the heatpipes themselves from becoming a hotspot on the graphics card. To accomplish this, MSI employs a dual-slot aluminum heatsink.
Main features of the Radeon HD 4850:
– GPU: RV770
– 800 stream processors
– ROPs: 16
– Transistors: 956 million
– Memory: 512Mb GDDR3 256-bit
– core clock: 625MHz
– memory clock: 1.0GHz
– DirectX 10 / Shader Model 4.1
– OpenGL 2.1
Read the complete review here: MSI R4850 512M Review
The weird thing is FiringSqaud has used the Catalyst 7.7
to test this Radeon. Mistake???
More reviews on the Radeon HD 4850: Radeon HD 4850 reviews @ Geeks3D
Turbo3D announces its Radeon HD 4850 / 4870 equipped with the Accelero Twin Turbo active cooler. Feel the Breeze, Feel the Power as Force3D says… I’d like to see how these cards will react with FurMark 😉
– Press Release.
AMD’s new ATI Radeon HD 4800 series provides shader powered antialiasing features!The guys at [H]ardOCP examine in-game IQ and AA scaling. They’ve got all the information on using the Edge-detect Custom Filtering AA and what it will do for you in-game. If you are not sure how to best leverage your new 4870 or 4850 video cards, read the complete article HERE.
TT-Hardware nous propose un article comparatif des performances entre la GeForce GTX 280 et les Radeon HD 4870/4850.
Lire le test complete ICI.
La GeForce GTX 280 confirme qu’elle est bien la carte de tous les superlatifs : la plus grosse, la plus complexe, la plus performante mais aussi la plus encombrante, la plus bruyante, la plus gourmande et surtout la plus chère (de 460 € à plus de 500 €). Des points faibles qui pèsent lourd par rapport aux avantages surtout que la Radeon HD 4870 vient jouer les trouble-fêtes. En effet, si la Radeon HD 4870 est un peu en retrait par rapport à sa rivale, elle est surtout beaucoup moins chère (230 €) et nettement plus discrète. Sa seule contrepartie est une consommation importante au repos. La Radeon HD 4850 (moins de 160 €) est la révélation de ce comparatif : elle ne souffre d’aucun point faible. Ses prestations la mettent en concurrence avec la GeForce 8800 GTS OC MSI ainsi que les GeForce 9800 GTX et GTX+ (220 à 230 €). Ces dernières sont au moins 30% plus chères et nettement plus bruyantes et donc dans l’état actuel des choses sans le moindre intérêt ! Seules les GeForce 8800 GTS 512 Mo peuvent encore tirer leur épingle du jeu en raison d’un prix inférieur à 200 € et un silence de fonctionnement plus qu’appréciable. Particulièrement intéressante à son lancement, la GeForce 9600 GT est aujourd’hui caduque.
TT-Hardware has published a comparative article about GeForce GTX 280 and Radeon HD 4870/4850 performances.
Read the complete article HERE (in french only).
TUL Corporation’s PCS HD4850 is the world’s first graphics card to offer on-board 2gig video memory. The card is based on RV770 core chip, with 800 stream processors and 2GB of GDDR3 high-speed memory.
Memory size makes a great impact on performance, even a powerful GPU can suffer from bottlenecks due to slow and insufficient video memory. The more the memory buffer, the more the data graphics can be saved – thus eliminating the need to access system memory and providing faster graphical performance.
– Press Release
-source of source-
Sapphire has always offered the most influential ATI graphics products available, and the new Radeon HD 4850 is no different. Although it still uses GDDR3 clocked at 993 (1986 MHz DDR), unlike the 4870 version that is decked out with GDDR5, the Sapphire 100242L model offers 24x custom filter anti-aliasing (CFAA) on its 625 MHz 800-core RV770 GPU. Benchmark Reviews tests the Sapphire Radeon HD 4850 graphics card against the closest competition, and even compare CrossFireX performance in this performance review.
Read the full review HERE.
Since Radeon series 4800 cards offer so much value, it might even be interesting to pair them in CrossfireX mode. AMDs ATI solution can be paired and matched as well. So today Guru3D has placed several cards together in CrossfireX mode.
Read the complete review HERE
No kidding it is sick how much performance these cards combined can push, the 2-way GPU scaling is just really superb. Crossfire with two series 4800 cards definitely makes more sense than NVIDIA’s high-end SLI money wise.
The chaps overs at Phoronix have analyzed the performance of the Radeon HD 4850 under Linux.
Read the complete article HERE.
While the ATI Radeon HD 4800 series was greeted with same-day Linux support, this first-cut Linux support clearly isn’t as well optimized as the Windows driver.
Alternatively, to this point they may have spent all of their resources tuning the DirectX performance and have forgone tuning the OpenGL side.
What’s the explanation for the Radeon HD 4850 on Linux falling so far behind their competitors? According to AMD engineers the Linux driver has yet to be well optimized.
The french website hardware.fr has just released a huge article (23-page) on the architecture of the Radeon HD 4870 and 4850. Currently this article is in french only but should be translated soon in english.
Read the full article HERE.
Hardware.fr vient tout juste de sortir un énorme dossier sur l’analyse détaillée des Radeon HD 4870 et 4850. Un must-to-read pour tous les graphics geeks que nous sommes!
Les 23 pages du dossier sont disponible ICI.
Expreview has just published a huge 25-page review about Radeon HD 4870 and 4850. Expreview compares Radeon 4870 and 4850 with other modern graphics cards such as Radeon HD 3870/3870 X2, GeForce GTX 280/260 and GeForce 9800 GTX.
Read the complete review HERE.
Radeon HD 4870
Radeon HD 4850
FurMark has been used to stress Radeon HD 4870 and 4850’s GPUs.
So, numbers can talk for itself. With the price tag $199(HD 4850) and $299 (HD 4870), RV770 is the BEST bang for the buck. Compare to GTX 260, A $299 only HD 4870 is a smarter choice. Yes, using this kind of word seems quite biased, but if you read all numbers from our review you will see my point.
Compare to GTX 260, HD 4870 is only 3/4 of its price while test items show the card have almost the same firepower!
HD 4850’s rival is 9800GTX, and we can see while their price keeps the same, HD 4850 have more than 15% leading.
TechSpot has published a review about ASUS’s Radeon HD 4850 Extreme.
Read the review HERE.
Overall the Radeon HD 4850 has proven to be a real winner, and possibly one the best $200 graphics cards we have ever reviewed. The power consumption levels are excellent, performance was amazing, and hopefully with some decent cooling the overclocking will improve as well.
TweakTown has tested four Radeon HD 4850 in CrossfireX on the trusty 4GHz QX9650.
Read the review HERE.
Two cards really is the sweet spot for HD 4850s at the moment; we see some good gains over a single card and the cost is still relatively low compared to the competition.
AMD have a winner on their hands with the HD 4850; just don’t expect to see the same value for money as you start climbing the ranks with three or four cards. It could still be a while before we see these kinds of setups represent any form of value for money, much like NVIDIA with their Tri SLI GTX 280 setup.
Guru3D has reviewed the new product of ATI, the Radeon HD 4850. Two graphics cards makers are in the spotlight: Force3D and PowerColor.
The Radeon 4850 features 800 shader processors, 40 textures units and a 55nm fabrication process.
Read the full review HERE
At 199 USD this is just a bitching nice product. By releasing the Radeon HD 4850 not only you get a very feature packed and stuffed product,
you’ll also purchase a product that is competing with a GeForce 9800 GTX really well.
At this very moment, I’d pick up the Radeon HD 4850 for several reasons though. One of them is DX 10.1 support, the second one is slightly
(on average) better performance.
Back to the 4850 then, not everything about it is perfect though, sorry. The temperatures this card reaches are not really fun to observe,
80-85 Degrees C is normal for this card. Heat is dumped inside the PC due to the single slot cooler, and it certainly dumps a lot of heat.
The Radeon HD 48×0 series will have 800 SPU (Shader Processing Unit).
bit-tech.net took some photos of a Radeon HD 4850 graphics card at Computex 2008:
More pitures HERE
Here are the pictures of the Radeon HD 4850 and 4870, both powered by the RV770 GPU.
Voici les images des Radeon HD 4850 et 4870, toutes les deux équipées du GPU RV770.
ATI Radeon HD 4850
ATI Radeon HD 4870