Sapphire provides the new flagship 7970 Toxic GHz Edition with a full 6 GB of video memory and uses one of the new Tahiti XT2 chips, which is even clocked with 1.2 GHz thanks to “Lethal Boost”, as long as the card runs within the thermally intended limits. The then higher RAM clock of 1600 MHz also promises a rich gain, always provided you find a worthwhile task for this constellation. Reason enough to test this card especially in the high resolutions and to question whether this enormous memory expansion brings any added value at all.
What could be better for this than Eyefinity 6? But stop! Almost everyone will now object at this point that you need a special Eyefinity edition of the HD 7970 for this, as long as you use simple monitors with DVI input, because the conventional cards don’t have enough outputs. This is true in principle, but it is still wrong. We will namely show how you can very well create an Eyefinity landscape of extra width with 3 splitters and whether only a graphics card is even capable of moving the enormous pixel heaps quickly enough. We also don’t want to forget the test where we question the added value of the double-sized memory. Quite an extensive program, some of which we have outsourced to other venues in the form of a public event. The new Sapphire card has to prove itself against the already tested Gigabyte 7970 Windforce 5X, which we only overclocked to 1.2 GHz this time to test a direct comparison model with 3 GB memory expansion.
Technical data and details
Sapphire has used AMD’s Tahiti XT2 for the 7970 Toxic and thus also the TDP limiter introduced with the GHz Edition via the clock reduction when the load or temperature is too high. Whether this decision was really wise, we will find out later. First, let’s look at the sober facts about the card. With a memory expansion of 6 GB RAM and clock rates of up to 1600 MHz, you first use what is currently technically feasible with full hands.
The technical parameters are now revealed in the tabular overview:
| Sapphire 7970 Toxic GHz Edition |
Gigabyte 7970 SOC Windforce 5X |
Radeon HD 7970 GHz Edition |
Radeon HD 7970 | |
|---|---|---|---|---|
| Stream processors | 2048 | 2048 | 2048 | 2048 |
| Texture units | 128 | 128 | 128 | 128 |
| Full Color ROPs | 32 | 32 | 32 | 32 |
| GPU clock | Standard: 1050 MHz Base 1100 MHz Boost “Lethal Boost”: |
1080 MHz | 1000 MHz Base 1050 MHz Boost |
925 MHz |
| Texture fill rate | 140.8 MHz Gtex/s 153.6 Gtex/s |
138.2 Gtex/s | 134.4 Gtex/s | 118.4 Gtex/s |
| Memory clock | 1500 MHz 1600 MHz |
1375 MHz | 1500 MHz | 1375 MHz |
| Memory bus | 384-bit | 384-bit | 384-bit | 384-bit |
| Memory throughput | 288 GB/s 307.2 GB/s |
264 GB/s | 288 GB/s | 264 GB/s |
| Graphics memory | 6 GB GDDR5 | 3 GB GDDR5 | 3 GB GDDR5 | 3 GB GDDR5 |
| The size | 365 mm² | |||
| Transistors in billions | 4,31 | |||
| Structure size | 28 nm | |||
| Power connections | 2 x 8 pin | 2 x 8-pin | 1 x 8-pin, 1 x 6-pin | 1 x 8-pin, 1 x 6-pin |
| Power consumption maximum (TDP) |
320 watt | 300 watt | 275 W | 250 W |
- 1 - Einführung und Übersicht
- 2 - Unboxing und Features
- 3 - Platine, Kühlsystem und Stromversorgung
- 4 - Taktraten und der Lethal Boost
- 5 - Takt und Leistungsaufnahme bei Vollast
- 6 - Takt und Leistungsaufnahme beim Gaming
- 7 - Temperaturen und Lüfterdrehzahlen
- 8 - Lautstärkevergleiche im Video
- 9 - Wir bauen ein Eyefinity-System
- 10 - Eyefinity 6 und Benchmarkergebnisse
- 11 - Eyefinity 4 und Benchmarkergebnisse
- 12 - Zusammenfassung und Fazit
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